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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

[x] Annual report pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
[No Fee Required]
For the year ended December 31, 1999 or

[ ] Transition report pursuant to Section 13 or 15(d) of the
Securities
Exchange Act of 1934 [No Fee Required]
For the transition period from to
Commission file number 0-17178

DEAN WITTER MULTI-MARKET PORTFOLIO L.P.

(Exact name of registrant as specified in its Limited Partnership
Agreement)

DELAWARE 13-3469595
(State or other jurisdiction of
(I.R.S. Employer
incorporation or organization)
Identification No.)

c/o Demeter Management Corporation
Two World Trade Center, - 62nd Flr., New York, N.Y.
10048
(Address of principal executive offices)
(Zip Code)

Registrant's telephone number, including area code
(212) 392-5454

Securities registered pursuant to Section 12(b) of the Act:

Title of each class
Name of each exchange
on which
registered

None None

Securities registered pursuant to Section 12(g) of the Act:


Units of Limited Partnership Interest

(Title of Class)

Indicate by check-mark whether the registrant (1) has filed
all reports required to be filed by Section 13 or 15(d) of the
Securities Exchange Act of 1934 during the preceding 12 months
(or for such shorter period that the registrant was required to
file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes X No
Indicate by check-mark if disclosure of delinquent filers
pursuant to Item 405 of Regulation S-K (section 229.405 of this
chapter) is not contained herein, and will not be contained, to
the best of registrant's knowledge, in definitive proxy or
information statements incorporated by reference in Part III of
this Form 10-K or any amendment of this Form 10-K.[X ]

State the aggregate market value of the Units of Limited
Partnership Interest held by non-affiliates of the registrant.
The aggregate market value shall be computed by reference to the
price at which units were sold as of a specified date within 60
days prior to the date of filing: $7,728,832 at January 31, 2000.

DOCUMENTS INCORPORATED BY REFERENCE
(See Page 1)






DEAN WITTER MULTI-MARKET PORTFOLIO L.P.
INDEX TO ANNUAL REPORT ON FORM 10-K
DECEMBER 31, 1999

Page No.


DOCUMENTS INCORPORATED BY REFERENCE. . . . . . . . . . . . . . .
. . . . . 1
Part I .
Item 1. Business. . . . . . . . . . . . . . . . . . . . . .
. . . . 2-4

Item 2. Properties. . . . . . . . . . . . . . . . . . . . .
. . . . 4

Item 3. Legal Proceedings. . . . . . . . . . . . . . . . . . .
. . 5-6

Item 4. Submission of Matters to a Vote of Security Holders
. . . . 7
Part II.

Item 5. Market for the Registrant's Partnership Units
and Related Security Holder Matters. . . . . . . . . .
. . 8

Item 6. Selected Financial Data. . . . . . . . . . . . . . . .
. . . 9

Item 7. Management's Discussion and Analysis of Financial
Condition and Results of Operations. . . . . . . . . .
. .10-23

Item 7A. Quantitative and Qualitative Disclosures About
Market Risk . . . . . . . . . . . . . . . . . . . . .
. 23-36

Item 8. Financial Statements and Supplementary Data. . . . . .
. . .36

Item 9. Changes in and Disagreements with Accountants on
Accounting and Financial Disclosure. . . . . . . . . .
. . 36
Part III.

Item10. Directors and Executive Officers of the Registrant .
. . 37-41

Item11. Executive Compensation . . . . . . . . . . . . . . . .
. . . 41

Item12. Security Ownership of Certain Beneficial Owners
and Management . . . . . . . . . . . . . . . . . .
. . . . 41

Item13. Certain Relationships and Related Transactions . . . .
. . 42
Part IV.

Item14. Exhibits, Financial Statement Schedules, and
Reports on Form 8-K . . . . . . . . . . . . . . . . . .
. . 43






DOCUMENTS INCORPORATED BY REFERENCE


Portions of the following documents are incorporated by reference
as follows:


Documents Incorporated Part of Form 10-K

Partnership's Prospectus dated
June 24, 1988 I

Annual Report to Dean Witter
Multi-Market Portfolio L.P.
Limited Partners for the year
ended December 31, 1999 II, III and IV





























PART I

Item 1. BUSINESS

(a) General Development of Business. Dean Witter Multi-Market

Portfolio L.P. (formerly, Dean Witter Principal Guaranteed Fund

L.P.) (the "Partnership") is a Delaware limited partnership

organized to engage primarily in the speculative trading of

futures contracts, forward contracts, and other commodity

interests (collectively, "futures interests").



The general partner for the Partnership is Demeter Management

Corporation ("Demeter"). The non-clearing commodity broker is

Dean Witter Reynolds Inc. ("DWR") and an unaffiliated clearing

commodity broker, Carr Futures Inc. ("Carr"), provides clearing

and execution services. The Trading Advisor is Dean Witter

Futures & Currency Management Inc. ("DWFCM" or the "Trading

Advisor"). Demeter, DWR and DWFCM are wholly-owned subsidiaries

of Morgan Stanley Dean Witter & Co. ("MSDW").



The Partnership's Net Asset Value per unit of limited partnership

interest ("Unit(s)") as of December 31, 1999 was $1,100.09,

representing a loss of 8.8 percent from the Net Asset Value per

Unit of $1,205.86 at December 31, 1998. For a more detailed

description of the Partnership's business see subparagraph (c).







(b) Financial Information about Industry Segments. For financial

information reporting purposes, the Partnership is deemed to

engage in one industry segment, the speculative trading of

futures interests. The relevant financial information is

presented in Items 6 and 8.



(c) Narrative Description of Business. The Partnership is in the

business of speculative trading of futures interests, pursuant to

trading instructions provided by the Trading Advisor. For a

detailed description of the different facets of the Partnership's

business, see those portions of the Partnership's prospectus (the

"Prospectus"), dated June 24, 1988, incorporated by reference in

this Form 10-K, set forth below:

Facets of Business

1. Summary 1. "Summary of the Prospectus"
(Pages 2-11 of the
Prospectus).

2. Commodity Markets 2. "The Commodities Markets"
(Pages 158-168 of the
Prospectus).

3. Partnership's Commodity 3. "Trading Policies" (Pages
Trading Arrangements and 153-154 of the Prospectus
Policies and Supplemental Informa-
tion Regarding Dean
Witter Futures & Currency
Management Inc. dated
August 27, 1993).








4. Management of the Partnership 4. "The Management
Agreement"
(Pages 156-158 of the
Prospectus and
Supplemental
Information Regarding
Dean Witter Futures &
Currency
Management Inc.
dated August 27,
1993).
"The General
Partner"
(Pages 36-52 of
the
Prospectus) "The
Commodity Broker"
(Pages 154-155 of
the
Prospectus) and
"The
Limited
Partnership
Agreement" (Pages
169-
174 of the
Prospectus).

5. Taxation of the Partnership's 5. "Material Federal Income
Limited Partners Tax Considerations"
and "State and Local
Income Tax Aspects"
(Pages 176-185 of the
Prospectus).

(d) Financial Information About Foreign and Domestic Operations
and Export Sales.

The Partnership has not engaged in any operations in foreign

countries; however, the Partnership (through the commodity

brokers) enters into forward contract transactions where foreign

banks are the contracting party and trades in futures interests

on foreign exchanges.

Item 2. PROPERTIES

The executive and administrative offices are located within the

offices of DWR. The DWR offices utilized by the Partnership are

located at Two World Trade Center, 62nd Floor, New York, NY

10048.





Item 3. LEGAL PROCEEDINGS

The class actions first filed in 1996 in California and in New

York State courts were each dismissed in 1999. However, in the

New York State class action, plaintiffs appealed the trial

court's dismissal of their case on March 3, 2000.



On September 6, 10, and 20, 1996, and on March 13, 1997,

purported class actions were filed in the Superior Court of the

State of California, County of Los Angeles, on behalf of all

purchasers of interests in limited partnership commodity pools

sold by DWR. Named defendants include DWR, Demeter, DWFCM, MSDW,

certain limited partnership commodity pools of which Demeter is

the general partner (all such parties referred to hereafter as

the "Morgan Stanley Dean Witter Parties") and certain trading

advisors to those pools. On June 16, 1997, the plaintiffs in the

above actions filed a consolidated amended complaint, alleging,

among other things, that the defendants committed fraud, deceit,

negligent misrepresentation, various violations of the California

Corporations Code, intentional and negligent breach of fiduciary

duty, fraudulent and unfair business practices, unjust

enrichment, and conversion in the sale and operation of the

various limited partnership commodity pools. The complaints seek

unspecified amounts of compensatory and punitive damages and

other relief. The court entered an order denying class

certification on August 24, 1999. On September 24, 1999, the

court entered an order dismissing





the case without prejudice on consent. Similar purported class

actions were also filed on September 18 and 20, 1996, in the

Supreme Court of the State of New York, New York County, and on

November 14, 1996 in the Superior Court of the State of Delaware,

New Castle County, against the Morgan Stanley Dean Witter Parties

and certain trading advisors on behalf of all purchasers of

interests in various limited partnership commodity pools sold by

DWR. A consolidated and amended complaint in the action pending

in the Supreme Court of the State of New York was filed on August

13, 1997, alleging that the defendants committed fraud, breach of

fiduciary duty, and negligent misrepresentation in the sale and

operation of the various limited partnership commodity pools. The

complaints seek unspecified amounts of compensatory and punitive

damages and other relief. The New York Supreme Court dismissed

the New York action in November 1998, but granted plaintiffs

leave to file an amended complaint, which they did in early

December 1998. The defendants filed a motion to dismiss the

amended complaint with prejudice on February 1, 1999. By

decision dated December 21, 1999, the New York Supreme Court

dismissed the case with prejudice.



In addition, on December 16, 1997, upon motion of the plaintiffs,

the action pending in the Superior Court of the State of Delaware

was voluntarily dismissed without prejudice.







Item 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

None.












































PART II

Item 5. MARKET FOR THE REGISTRANT'S PARTNERSHIP UNITS AND
RELATED SECURITY HOLDER MATTERS

(a) Market Information

There is no established public trading market for Units of the

Partnership.

(b) Holders

The number of holders of Units at December 31, 1999 was

approximately 1,312.

(c) Distributions

No distributions have been made by the Partnership since it

commenced trading operations on August 31, 1988. Demeter has

sole discretion to decide what distributions, if any, shall be

made to investors in the Partnership. Demeter currently does not

intend to make any distribution of Partnership profits.






























Item 6. SELECTED FINANCIAL DATA (in dollars)







For the Years
Ended December 31,
1999 1998 1997
1996 1995


Total Revenues
(including interest) (52,906) 1,454,762 2,476,075 358,079 1,268,953

Net Income (Loss) (848,874) 540,864 1,393,549 (1,110,424)
(1,045,666)

Net Income (Loss)
Per Unit (Limited
& General Partners) (105.77) 64.23 133.87 (73.06)
(73.49)

Total Assets 8,030,735 10,054,538 11,035,294 12,169,963 15,916,814

Total Limited
Partners' Capital 7,791,740 9,851,534 10,451,503 1
1,628,908 15,216,606

Net Asset Value Per
Unit 1,100.09 1,205.86
1,141.63 1,007.76 1,080.82


















Item 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS

Liquidity - The Partnership deposits its assets with DWR as non-

clearing broker and Carr as clearing broker in separate futures

trading accounts established for the Trading Advisor, which

assets are used as margin to engage in trading. The assets are

held in either non-interest-bearing bank accounts or in

securities and instruments permitted by the Commodity Futures

Trading Commission ("CFTC") for investment of customer segregated

or secured funds. The Partnership's assets held by the commodity

brokers may be used as margin solely for the Partnership's

trading. Since the Partnership's sole purpose is to trade in

futures and forwards, it is expected that the Partnership will

continue to own such liquid assets for margin purposes.



The Partnership's investment in futures and forwards may, from

time to time, be illiquid. Most U.S. futures exchanges limit

fluctuations in prices during a single day by regulations

referred to as "daily price fluctuations limits" or "daily

limits". Trades may not be executed at prices beyond the daily

limit. If the price for a particular futures contract has

increased or decreased by an amount equal to the daily limit,

positions in that futures contract can neither be taken nor

liquidated unless traders are willing to effect trades at or

within the limit. Futures prices have occasionally moved the

daily limit for







several consecutive days with little or no trading. These market

conditions could prevent the Partnership from promptly

liquidating its futures contracts and result in restrictions on

redemptions.



There is no limitation on daily price moves in trading forward

contracts on foreign currencies. The markets for some world

currencies have low trading volume and are illiquid, which may

prevent the Partnership from trading in potentially profitable

markets or prevent the Partnership from promptly liquidating

unfavorable positions in such markets and subjecting it to

substantial losses. Either of these market conditions could

result in restrictions on redemptions.



The Partnership has never had illiquidity affect a material

portion of its assets.



Capital Resources. The Partnership does not have, or expect to

have, any capital assets. Redemptions of Units in the future

will affect the amount of funds available for investments in

futures interests in subsequent periods. It is not possible to

estimate the amount and therefore, the impact of future

redemptions of Units.







Results of Operations.

General. The Partnership's results depend on its Trading Advisor

and the ability of the Trading Advisor's trading programs to take

advantage of price movements or other profit opportunities in the

futures, forwards, and options markets. The following presents a

summary of the Partnership's operations for the three years ended

December 31, 1999 and a general discussion of its trading

activities during each period. It is important to note, however,

that the Trading Advisor trades in various markets at different

times and that prior activity in a particular market does not

mean that such market will be actively traded by the Trading

Advisor or will be profitable in the future. Consequently, the

results of operations of the Partnership are difficult to discuss

other than in the context of its Trading Advisor's trading

activities on behalf of the Partnership as a whole and how the

Partnership has performed in the past.




At December 31, 1999, the Partnership's total capital was

$7,901,749, a decrease of $2,070,371 from the Partnership's total

capital of $9,972,120 at December 31, 1998. For the year ended

December 31, 1999, the Partnership generated a net loss of

$848,874 and total redemptions aggregated $1,221,497.







For the year ended December 31, 1999, the Partnership recorded

total trading losses, net of interest income, of $52,906 and

posted a decrease in Net Asset Value per Unit. The Partnership

experienced losses in the global interest rate futures markets of

approximately 8.93%, primarily from short Australian interest

rate futures positions as prices increased during July and August

on the temporary strength in U.S. bonds and weaker-than-expected

business spending data out of Australia. Additional losses were

recorded from short Japanese bond futures positions as prices

increased during the first and third quarters. In the currency

markets, losses of approximately 6.92% were recorded primarily

from Australian dollar positions. Throughout a majority of the

first quarter, losses were experienced from long Australian

dollar positions as its value dropped significantly relative to

the U.S. dollar on speculation regarding potential currency

devaluations in the Asian region. Early in the third quarter,

additional losses were recorded from long positions in this

currency due to depressed commodities prices, emerging market

concerns and on-going talks that China may eventually devalue its

currency. Newly established short positions in the Australian

dollar resulted in losses during September as its value

strengthened relative to the U.S. dollar following the rally in

gold prices. Offsetting currency gains of 3.82% were recorded

from Japanese yen positions, primarily long positions. During

the third quarter, gains were recorded from long positions in the

Japanese yen





as the value of the yen climbed to a 44-month high versus the

U.S. dollar due to continued optimism over Japan's economic

recovery. The energy markets produced gains of approximately

7.21%. During March, gains were recorded from long positions in

oil futures as prices moved significantly higher on news that

both OPEC and non-OPEC countries had reached an agreement to cut

total output beginning April 1st. Gains were also recorded in

this market complex during the third quarter after OPEC ministers

confirmed that they would uphold their global cutbacks until

April of 2000. Total expenses for the year were $795,968,

resulting in a net loss of $848,874. The value of a Unit

decreased from $1,205.86 at December 31, 1998 to $1,100.09 at

December 31, 1999.



At December 31, 1998, the Partnership's total capital was

$9,972,120, a decrease of $828,723 from the Partnership's total

capital of $10,800,843 at December 31, 1997. For the year ended

December 31, 1998, the Partnership generated net income of

$540,864 and total redemptions aggregated $1,369,587.



For the year ended December 31, 1998, the Partnership recorded

total trading revenues, including interest income, of $1,454,762

and posted an increase in Net Asset Value per Unit. Gains of

approximately 13.35% were recorded in the global interest rate

futures markets from bond futures in most major world countries

throughout the year. The most significant gains were recorded in

German bond futures, (approximately 5.34%), U.S. bond futures,

(approximately



4.15%) and Japanese bond futures, (approximately 2.85%) from

primarily long positions during August and September as investors

sought the safety of fixed income investments from notable

volatility in the global financial markets. Additional profits

were recorded from short Japanese government bond futures

positions during December as prices declined amid a surge in

Japanese bond yields, which was attributed to news that Japan's

Ministry of Finance would end outright purchases of government

debt. Total expenses for the year were $913,898, resulting in

net income of $540,864. The value of a Unit increased from

$1,141.63 at December 31, 1997 to $1,205.86 at December 31, 1998.



At December 31, 1997, the Partnership's total capital was

$10,800,843, a decrease of $1,136,439 from the Partnership's

total capital of $11,937,282, at December 31, 1996. For the year

ended December 31, 1997, the Partnership generated net income of

$1,393,549 and total redemptions aggregated $2,529,988.



For the year ended December 31, 1997, the Partnership recorded

total trading revenues, including interest income, of $2,476,075

and posted an increase in Net Asset Value per Unit. 1997 was a

profitable year for the Partnership. Gains of approximately

20.07% were recorded in the currency markets primarily from

sustained price movements during January and February and then

again in November and December from short Japanese yen positions

as the value of the U.S. dollar increased versus the yen. A

portion of the Partnership's overall



gains was offset by losses of approximately 4.74% recorded in the

global interest rate futures markets primarily due to a sharp

trend reversal in international interest rate futures prices

during the fourth quarter and as a result of short-term

volatility in domestic bond and stock index futures. Offsetting

gains were recorded from long global interest rate futures

positions during June and July. Although many of the profitable

periods with long price trends were followed by trend reversals

and short-term volatile price movement, DWFCM's intermediate to

long-term trend following trading methodology was able to retain

profits. Total expenses for the year were $1,082,526, resulting

in net income of $1,393,549. The value of a Unit increased from

$1,007.76 at December 31, 1996 to $1,141.63 at December 31, 1997.



The Partnership's overall performance record represents varied

results of trading in different futures interests markets. For a

further description of 1999 trading results, refer to the letter

to the Limited Partners in the accompanying Annual Report to

Limited Partners for the year ended December 31, 1999, which is

incorporated by reference to Exhibit 13.01 of this Form 10-K.

The Partnership's gains and losses are allocated among its

partners for income tax purposes.







Credit Risk.

Financial Instruments. The Partnership is a party to financial

instruments with elements of off-balance sheet market and credit

risk. The Partnership may trade futures, forwards, and options

in a portfolio of agricultural commodities, energy products,

foreign currencies, interest rates, precious and base metals,

soft commodities, and stock indices. In entering into these

contracts, the Partnership is subject to the market risk that

such contracts may be significantly influenced by market

conditions, such as interest rate volatility, resulting in such

contracts being less valuable. If the markets should move

against all of the positions held by the Partnership at the same

time, and if the Trading Advisor was unable to offset positions

of the Partnership, the Partnership could lose all of its assets

and investors would realize a 100% loss.



In addition to the Trading Advisor's internal controls, the

Trading Advisor must comply with the trading policies of the

Partnership. These trading policies include standards for

liquidity and leverage with which the partnership must comply.

The Trading Advisor and Demeter monitor the Partnership's trading

activities to ensure compliance with the trading policies.

Demeter may require the Trading Advisor to modify positions of

the Partnership if Demeter believes they violate the

Partnership's trading policies.



In addition to market risk, in entering into futures, forwards,

and options contracts there is a credit risk to the Partnership

that the counterparty on a contract will not be able to meet its

obligations to the Partnership. The ultimate counterparty or

guarantor of the Partnership for futures contracts traded in the

United States and the foreign exchanges on which the Partnership

trades is the clearinghouse associated with such exchange. In

general, a clearinghouse is backed by the membership of the

exchange and will act in the event of non-performance by one of

its members or one of its member's customers, which should

significantly reduce this credit risk. For example, a

clearinghouse may cover a default by drawing upon a defaulting

member's mandatory contributions and/or non-defaulting members'

contributions to a clearinghouse guarantee fund, established

lines or letters of credit with banks, and/or the clearinghouse's

surplus capital and other available assets of the exchange and

clearinghouse, or assessing its members. In cases where the

Partnership trades off-exchange forward contracts with a

counterparty, the sole recourse of the Partnership will be the

forward contracts counterparty.



There is no assurance that a clearinghouse or exchange will meet

its obligations to the Partnership, and Demeter and the commodity

brokers will not indemnify the Partnership against a default by

such parties. Further, the law







is unclear as to whether a commodity broker has any obligation to

protect its customers from loss in the event of an exchange or

clearinghouse defaulting on trades effected for the broker's

customers. Any such obligation on the part of a broker appears

even less clear where the default occurs in a non-U.S.

jurisdiction.



Demeter deals with these credit risks of the Partnership in

several ways. First, it monitors the Partnership's credit

exposure to each exchange on a daily basis, calculating not only

the amount of margin required for it but also the amount of its

unrealized gains at each exchange, if any. The commodity brokers

inform the Partnership, as with all their customers, of its net

margin requirements for all its existing open positions, but do

not break that net figure down, exchange by exchange. Demeter,

however, has installed a system which permits it to monitor the

Partnership's potential margin liability, exchange by exchange.

As a result, Demeter is able to monitor the Partnership's

potential net credit exposure to each exchange by adding the

unrealized trading gains on that exchange, if any, to the

Partnership's margin liability thereon.



Second, the Partnership's trading policies limit the amount of

its Net Assets that can be committed at any given time to futures

contracts and require, in addition, a minimum amount of

diversification in the Partnership's trading,



usually over several different products. One of the aims of such

trading policies has been to reduce the credit exposure of the

Partnership to a single exchange and, historically, the

Partnership's exposure to any one exchange has typically amounted

to only a small percentage of its total Net Assets. On those

relatively few occasions where the Partnership's credit exposure

may climb above such level, Demeter deals with the situation on a

case by case basis, carefully weighing whether the increased

level of credit exposure remains appropriate. Material changes

to the trading policies may be made only with the prior written

approval of the limited partners owning more than 50% of Units

then outstanding.



Third, Demeter has secured, with respect to Carr acting as the

clearing broker for the Partnership, a guarantee by Credit

Agricole Indosuez, Carr's parent, of the payment of the "net

liquidating value" of the transactions (futures and forward

contracts) in the Partnership's account.



With respect to forward contract trading, the Partnership trades

with only those counterparties which Demeter, together with DWR,

have determined to be creditworthy. At the date of this filing,

the Partnership deals only with Carr as its counterparty on

forward contracts. The guarantee by Carr's parent, discussed

above, covers these forward contracts.





See "Financial Instruments" under Notes to Financial Statements

in the Partnership's Annual Report to Limited Partners for the

year ended December 31, 1999, which is incorporated by reference

to Exhibit 13.01 of this Form

10-K.



Year 2000. Commodity pools, like financial and business

organizations and individuals around the world, depend on the

smooth functioning of computer systems. The Year 2000 issue

arose since many of the world's computer systems (including those

in non-information technology systems) traditionally recorded

years in a two-digit format. If not addressed, such computer

systems may have been unable to properly interpret dates beyond

the year 1999, which may have led to business disruptions in the

U.S. and internationally. Such disruptions could have adversely

affected the handling or determination of futures trades and

prices and other services for the Partnership. Accordingly,

Demeter has fully participated in a firmwide initiative

established by MSDW to address issues associated with the Year

2000. As part of this initiative, MSDW reviewed its global

software and hardware infrastructure for mainframe, server and

desktop computing environments and engaged in extensive

remediation and testing. The Year 2000 initiative also

encompassed the review of agencies, vendors and facilities for

Year 2000 compliance.







Since 1995, MSDW prepared actively for the Year 2000 issue to

ensure that it would have the ability to respond to any critical

business process failure, to prevent the loss of workspace and

technology, and to mitigate any potential financial loss or

damage to its global franchise. Where necessary, contingency

plans were expanded or developed to address specific Year 2000

risk scenarios, supplementing existing business policies and

practices. In conjunction with MSDW's Year 2000 preparations,

Demeter monitored the progress of Carr and the Trading Advisor

throughout 1999 in their Year 2000 compliance and, where

applicable, tested its external interfaces, with Carr and the

Trading Advisor. In addition, Demeter, the commodity brokers,

the Trading Advisor and all U.S. futures exchanges were subjected

to monitoring by the CFTC of their Year 2000 preparedness, and

the major foreign futures exchanges engaged in market-wide

testing of their Year 2000 compliance during 1999.



MSDW and Demeter consider the transition into the Year 2000

successful from the perspective of their internal systems and

global external interactions. Over the millennial changeover

period, no material issues were encountered, and MSDW, Demeter

and the Partnership conducted business as usual.



Risks Associated With the Euro. On January 1, 1999, eleven

countries in the European Union established fixed conversion

rates on their existing sovereign currencies and converted to a

common single currency (the euro). During a



three-year transition period, the sovereign currencies will

continue to exist but only as a fixed denomination of the euro.

Conversion to the euro prevents the Trading Advisor from trading

those sovereign currencies and thereby limits its ability to take

advantage of potential market opportunities that might otherwise

have existed had separate currencies been available to trade.

This could adversely affect the performance results of the

Partnership.



Item 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET
RISK

Introduction

The Partnership is a commodity pool involved in the speculative

trading of futures interests. The market-sensitive instruments

held by the Partnership are acquired for speculative trading

purposes only and, as a result, all or substantially all of the

Partnership's assets are at risk of trading loss. Unlike an

operating company, the risk of market-sensitive instruments is

central, not incidental, to the Partnership's main business

activities.



The futures interests traded by the Partnership involve varying

degrees of market risk. Market risk is often dependent upon

changes in the level or volatility of interest rates, exchange

rates, and prices of financial instruments and commodities.

Fluctuations in market risk based upon these







factors result in frequent changes in the fair value of the

Partnership's open positions, and, consequently, in its earnings

and cash flow.



The Partnership's total market risk is influenced by a wide

variety of factors, including the diversification among the

Partnership's open positions, the volatility present within the

markets, and the liquidity of the markets. At different times,

each of these factors may act to increase or decrease the market

risk associated with the Partnership.



The Partnership's past performance is not necessarily indicative

of its future results. Any attempt to numerically quantify the

Partnership's market risk is limited by the uncertainty of its

speculative trading. The Partnership's speculative trading may

cause future losses and volatility (i.e. "risk of ruin") that far

exceed the Partnership's experiences to date or any reasonable

expectations based upon historical changes in market value.



Quantifying the Partnership's Trading Value at Risk

The following quantitative disclosures regarding the

Partnership's market risk exposures contain "forward-looking

statements" within the meaning of the safe harbor from civil

liability provided for such statements by the Private Securities

Litigation Reform Act of 1995 (set forth in Section 27A of the

Securities Act of 1933 and Section 21E of the Securities Exchange

Act of 1934).



All quantitative disclosures in this section are deemed to be

forward-looking statements for purposes of the safe harbor,

except for statements of historical fact.



The Partnership accounts for open positions using mark-to-market

accounting principles. Any loss in the market value of the

Partnership's open positions is directly reflected in the

Partnership's earnings, whether realized or unrealized, and cash

flow. Profits and losses on open positions of exchange-traded

futures interests are settled daily through variation margin.



The Partnership's risk exposure in the market sectors traded by

the Trading Advisor is estimated below in terms of Value at Risk

("VaR"). The VaR model used by the Partnership includes many

variables that could change the market value of the Partnership's

trading portfolio. The Partnership estimates VaR using a model

based upon historical simulation with a confidence level of 99%.

Historical simulation involves constructing a distribution of

hypothetical daily changes in the value of a trading portfolio.

The VaR model takes into account linear exposures to price and

interest rate risk. Market risks that are incorporated in the

VaR model include equity and commodity prices, interest rates,

foreign exchange rates, and correlation among these variables.

The hypothetical changes in portfolio value are based on daily

percentage





changes observed in key market indices or other market factors

("market risk factors") to which the portfolio is sensitive. The

historical observation period of the Partnership's VaR is

approximately four years. The one-day 99% confidence level of

the Partnership's VaR corresponds to the negative change in

portfolio value that, based on observed market risk factors,

would have been exceeded once in 100 trading days.



VaR models, including the Partnership's, are continuously

evolving as trading portfolios become more diverse and modeling

techniques and systems capabilities improve. Please note that

the VaR model is used to numerically quantify market risk for

historic reporting purposes only and is not utilized by either

Demeter or the Trading Advisors in their daily risk management

activities.


The Partnership's Value at Risk in Different Market Sectors

The following tables indicates the VaR associated with the

Partnership's open positions as a percentage of total Net Assets

by primary market risk category as of December 31, 1999 and 1998.

As of December 31, 1999 and 1998, the Partnership's total

capitalization was approximately $8 million and $10 million,

respectively.








Primary Market December 31, 1999 December 31,
1998
Risk Category Value at Risk Value at
Risk

Interest Rate (.22)% (.50)%

Currency (.79) (.95)

Commodity (.81) (1.03)

Equity (.16) (.19)

Aggregate Value at Risk (1.26)% (1.37)%

Aggregate Value at Risk represents the aggregate VaR of all the

Partnership's open positions and not the sum of the VaR of the

individual Market Categories listed above. Aggregate VaR will be

lower as it takes into account correlation among different

positions and categories.



The table above represents the VaR of the Partnership's open

positions at December 31, 1999 and 1998 only and is not

necessarily representative of either the historic or future risk

of an investment in the Partnership. Because the Partnership's

only business is the speculative trading of futures interests,

the composition of its trading portfolio can change significantly

over any given time period, or even within a single trading day.

Any changes in open positions could positively or negatively

materially impact market risk as measured by VaR.







The table below supplements the year end VaR by presenting the

Partnership's high, low and average VaR, as a percentage of total

Net Assets for the four quarterly reporting periods from January

1, 1999 through December 31, 1999.



Primary Market Risk Category High Low

Average

Interest Rate (1.87)% (.22)% (.92)%

Currency (1.94) (.79) (1.59)

Commodity (1.32) (.81) (1.02)

Equity (.72) (.16) (.36)

Aggregate Value at Risk (3.05)% (1.26)% (2.25)%

Limitations on Value at Risk as an Assessment of Market Risk

The face value of the market sector instruments held by the

Partnership is typically many times the applicable margin

requirements. Margin requirements generally range between 2% and

15% of contract face value. Additionally, the use of leverage

causes the face value of the market sector instruments held by

the Partnership to typically be many times the total

capitalization of the Partnership. The value of the

Partnership's open positions thus creates a "risk of ruin" not

typically found in other investments. The relative size of the

positions held may cause the Partnership to incur losses greatly

in excess of VaR within a short period of time, given the effects

of the leverage employed and market volatility. The VaR tables

above, as well as the past



performance of the Partnership, gives no indication of such "risk

of ruin". In addition, VaR risk measures should be viewed in

light of the methodology's limitations, which include the

following:

past changes in market risk factors will not always result

in accurate predictions of the distributions and correlations of

future market movements;

changes in portfolio value in response to market movements

may differ from those of the VaR model;

VaR results reflect past trading positions while future risk

depends on future positions;

VaR using a one-day time horizon does not fully capture the

market risk of positions that cannot be liquidated or hedged

within one day; and

the historical market risk factor data used for VaR

estimation may provide only limited insight into losses that

could be incurred under certain unusual market movements.



VaR tables above present the results of the Partnership's VaR for

each of the Partnership's market risk exposures and on an

aggregate basis at December 31, 1999 and for the end of the four

quarterly reporting periods during calendar year 1999. Since VaR

is based on historical data, VaR should not be viewed as

predictive of the Partnership's future financial performance or

its ability to



manage or monitor risk. There can be no assurance that the

Partnership's actual losses on a particular day will not exceed

the VaR amounts indicated above or that such losses will not

occur more than 1 in 100 trading days.



Non-Trading Risk

The Partnership has non-trading market risk on its foreign cash

balances not needed for margin. These balances and any market

risk they may represent are immaterial. The Partnership also

maintains a substantial portion (approximately 89%) of its

available assets in cash at DWR. A decline in short-term

interest rates will result in a decline in the Partnership's cash

management income. This cash flow risk is not considered

material.



Materiality, as used throughout this section, is based on an

assessment of reasonably possible market movements and any

associated potential losses, taking into account the leverage,

optionality and multiplier features of the Partnership's market-

sensitive instruments.



Qualitative Disclosures Regarding Primary Trading Risk Exposures

The following qualitative disclosures regarding the Partnership's

market risk exposures - except for (A) those disclosures that are

statements of historical fact and (B) the descriptions of how the

Partnership manages its primary market risk exposures -

constitute forward-looking statements within the meaning of



Section 27A of the Securities Act and Section 21E of the

Securities Exchange Act. The Partnership's primary market risk

exposures as well as the strategies used and to be used by

Demeter and the Trading Advisor for managing such exposures are

subject to numerous uncertainties, contingencies and risks, any

one of which could cause the actual results of the Partnership's

risk controls to differ materially from the objectives of such

strategies. Government interventions, defaults and

expropriations, illiquid markets, the emergence of dominant

fundamental factors, political upheavals, changes in historical

price relationships, an influx of new market participants,

increased regulation and many other factors could result in

material losses as well as in material changes to the risk

exposures and the risk management strategies of the Partnership.

Investors must be prepared to lose all or substantially all of

their investment in the Partnership.



The following were the primary trading risk exposures of the

Partnership as of December 31, 1999, by market sector. It may be

anticipated however, that these market exposures will vary

materially over time.



Interest Rate. The largest exposure during the fourth quarter was

in the interest rate sector. Exposure was spread across the U.S.,

Swiss, Australian, and Japanese interest rate sectors. Interest

rate movements directly affect





the price of the sovereign bond positions held by the Partnership

and indirectly affect the value of its stock index and currency

positions. Interest rate movements in one country as well as

relative interest rate movements between countries materially

impact the Partnership's profitability.



The Partnership's primary interest rate exposure is generally to

interest rate fluctuations in the G-7 countries and Australia.

The G-7 countries consist of France, U.S., Britain, Germany,

Japan, Italy and Canada. Demeter anticipates that G-7 and

Australian interest rates will remain the primary interest rate

exposure of the Partnership for the foreseeable future. The

changes in interest rates, which have the most effect on the

Partnership, are changes in long-term and medium-term

instruments. Consequently, even a material change in short-term

rates would have little effect on the Partnership, were the

medium to long term rates to remain steady.



Currency. The next most significant exposure in the Partnership

is in the currency complex. The Partnership's currency exposure

is to exchange rate fluctuations, primarily fluctuations that

disrupt the historical pricing relationships between different

currencies and currency pairs. Interest rate changes as well as

political and general economic conditions influence these

fluctuations. The Partnership trades in a large number of

currencies,





including cross-rates i.e., positions between two currencies

other than the U.S. Dollar.



For the fourth quarter of 1999, the Partnership's foreign

currency exposure was in the euro currency crosses and outright

U.S. dollar positions (outright positions consist of the U.S.

dollar vs. other currencies). The currency trading VaR figure

includes foreign margin amounts converted into U.S. dollars with

an incremental adjustment to reflect the exchange rate risk

inherent to the dollar-based Partnership in expressing VaR in a

functional currency other than dollars.



Commodity.

Metals. The next noteworthy exposure was in the base and

precious metals markets. The Partnership's metals market exposure

in the fourth quarter of 1999 was to fluctuations in the prices

of base metals, as well as exposure in the gold and silver

markets. A significant amount of exposure was evident in the

base metals as the Partnership held sizeable positions due to a

period of low volatility prior to the upward price breakout.



The Partnership aims to equally weight market exposure in the

metals as much as possible, however base metals, during periods

of volatility, may affect





performance more dramatically than the precious metals markets.

Demeter anticipates that base metals will remain the primary

metals market exposure of the Partnership.



Energy. On December 31, 1999, the Partnership's energy exposure

was in futures contracts in the New York and Brent crude oil

markets. Price movements in these markets result from political

developments in the Middle East, weather patterns, and other

economic fundamentals. As oil prices have increased over 100%

this year, and, given that the agreement by OPEC to cut

production is closing in on expiring in March of 2000, it is

possible that volatility will remain on the high end. Significant

profits and losses have been and are expected to continue to be

experienced in these markets.



Soft Commodities. On December 31, 1999, the Partnership had

moderate exposure in the markets that comprise these sectors.

Most of the exposure however was in the cotton and sugar markets.

Supply and demand inequalities, severe weather disruptions and

market expectations affect price movements in these markets.



Equity. The Partnership's equity exposure on December 31, 1999

to price risk in the S&P 500 futures index was noteworthy. The

stock index futures traded by the Partnership are by law limited

to futures on broadly-based indices. Demeter anticipates little,

if any, trading in non G-7 stock indices. The



Partnership is primarily exposed to the risk of adverse price

trends or static markets in the U.S. and Japanese indices.

(Static markets would not cause major market changes but would

make it difficult for the Partnership to avoid being "whipsawed"

into numerous small losses.)



Qualitative Disclosures Regarding Non-Trading Risk Exposure

The following was the only non-trading risk exposure of the

Partnership as of December 31, 1999:



Foreign Currency Balances. The Partnership's foreign currency

balances are in Japanese yen, British pounds, euros, Swiss francs

and Australian dollars. The Partnership controls the non-trading

risk of these balances by regularly converting these balances

back into dollars upon liquidation of the respective position.



Qualitative Disclosures Regarding Means of Managing Risk Exposure

The Partnership and the Trading Advisor, separately, attempt to

manage the risk of the Partnership's open positions in

essentially the same manner in all market categories traded.

Demeter attempts to manage market exposure by diversifying the

Partnership's assets among different market sectors and trading

approaches, and monitoring the performance of the Trading Advisor





daily. In addition, the Trading Advisor establishes

diversification guidelines, often set in terms of the maximum

margin to be committed to positions in any one market sector or

market-sensitive instrument.



Demeter monitors and controls the risk of the Partnership's non-

trading instruments, cash. Cash is the only Partnership

investment directed by Demeter, rather than the Trading Advisor.



Item 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The Financial Statements are incorporated by reference to the

Partnership's Annual Report which is filed as Exhibit 13.01

hereto.



Supplementary data specified by Item 302 of Regulation S-K

(selected quarterly financial data) is not applicable.




Item 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
ACCOUNTING AND FINANCIAL DISCLOSURE.


None.









PART III

Item 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

There are no directors or executive officers of the Partnership.

The Partnership is managed by Demeter.


Directors and Officers of the General Partner

The directors and officers of Demeter are as follows:



Robert E. Murray, age 39, is Chairman of the Board, President and

a Director of Demeter. Mr. Murray is also Chairman of the Board,

President and a Director of DWFCM. Effective as of the close of

business on January 31, 2000, Mr. Murray replaced Mr. Hawley as

Chairman of the Board of Demeter and DWFCM. Mr. Murray is

currently a Senior Vice President of DWR's Managed Futures

Department. Mr. Murray began his career at DWR in 1984 and is

currently the Director of the Managed Futures Department. In this

capacity, Mr. Murray is responsible for overseeing all aspects of

the firm's Managed Futures Department. Mr. Murray currently

serves as Vice Chairman and a Director of the Managed Funds

Association, an industry association for investment professionals

in futures, hedge funds and other alternative investments. Mr.

Murray graduated from Geneseo State University in May 1983 with a

B.A. degree in Finance.





Mitchell M. Merin, age 46, is a Director of Demeter. Mr. Merin

is also a Director of DWFCM. Mr. Merin was appointed the Chief

Operating Officer of Individual Asset Management for MSDW in

December 1998 and the President and Chief Executive Officer of

Morgan Stanley Dean Witter Advisors in February 1998. He has

been an Executive Vice President of DWR since 1990, during which

time he has been director of DWR's Taxable Fixed Income and

Futures divisions, Managing Director in Corporate Finance and

Corporate Treasurer. Mr. Merin received his Bachelor's degree

from Trinity College in Connecticut and his M.B.A. degree in

finance and accounting from the Kellogg Graduate School of

Management of Northwestern University in 1977.



Joseph G. Siniscalchi, age 54, is a Director of Demeter. Mr.

Siniscalchi joined DWR in July 1984 as a First Vice President,

Director of General Accounting and served as a Senior Vice

President and Controller for DWR's Securities Division through

1997. He is currently Executive Vice President and Director of

the Operations Division of DWR. From February 1980 to July 1984,

Mr. Siniscalchi was Director of Internal Audit at Lehman Brothers

Kuhn Loeb, Inc.



Edward C. Oelsner, III, age 57, is a Director of Demeter. Mr.

Oelsner is currently an Executive Vice President and head of the

Product Development Group at Morgan Stanley Dean Witter Advisors,

an affiliate of DWR. Mr. Oelsner



joined DWR in 1981 as a Managing Director in DWR's Investment

Banking Department specializing in coverage of regulated

industries and, subsequently, served as head of the DWR Retail

Products Group. Prior to joining DWR, Mr. Oelsner held positions

at The First Boston Corporation as a member of the Research and

Investment Banking Departments from 1967 to 1981. Mr. Oelsner

received his M.B.A. in Finance from the Columbia University

Graduate School of Business in 1966 and an A.B. in Politics from

Princeton University in 1964.



Lewis A. Raibley, III, age 37, is Vice President, Chief Financial

Officer and a Director of Demeter. Mr. Raibley is also a

Director of DWFCM. Mr. Raibley is currently Senior Vice

President and Controller in the Individual Asset Management Group

of MSDW. From July 1997 to May 1998, Mr. Raibley served as

Senior Vice President and Director in the Internal Reporting

Department of MSDW and prior to that, from 1992 to 1997, he

served as Senior Vice President and Director in the Financial

Reporting and Policy Division of Dean Witter Discover & Co. He

has been with MSDW and its affiliates since June 1986.



Richard A. Beech, age 48, is a Director of Demeter. Mr. Beech

has been associated with the futures industry for over 23 years.

He has been at DWR since August 1984 where he is presently Senior

Vice President and head of Branch Futures. Mr. Beech began his

career at the Chicago Mercantile Exchange, where he became the

Chief Agricultural Economist doing market



analysis, marketing and compliance. Prior to joining DWR, Mr.

Beech also had worked at two investment banking firms in

operations, research, managed futures and sales management.



Ray Harris, age 43, is a Director of Demeter. Mr. Harris is

currently Executive Vice President, Planning and Administration

for Morgan Stanley Dean Witter Asset Management and has worked at

DWR or its affiliates since July 1982, serving in both financial

and administrative capacities. From August 1994 to January 1999,

he worked in two separate DWR affiliates, Discover Financial

Services and Novus Financial Corp., culminating as Senior Vice

President. Mr. Harris received his B.A. degree from Boston

College and his M.B.A. in finance from the University of Chicago.



Mark J. Hawley, age 56, served as Chairman of the Board and a

Director of Demeter and DWFCM throughout 1999. Mr. Hawley joined

DWR in February 1989 as Senior Vice President and served as

Executive Vice President and Director of DWR's Product Management

for Individual Asset Management throughout 1999. In this

capacity, Mr. Hawley was responsible for directing the activities

of the firm's Managed Futures, Insurance, and Unit Investment

Trust Business. From 1978 to 1989, Mr. Hawley was a member of

the senior management team at Heinold Asset Management, Inc., a

commodity pool operator, and was responsible for a





variety of projects in public futures funds. From 1972 to 1978,

Mr. Hawley was a Vice President in charge of institutional block

trading for the Mid-West at Kuhn Loeb & Company. Mr. Hawley

resigned effective January 31, 2000.



All of the foregoing directors have indefinite terms.



Item 11. EXECUTIVE COMPENSATION

The Partnership has no directors and executive officers. As a

limited partnership, the business of the Partnership is managed

by Demeter which is responsible for the administration of the

business affairs of the Partnership but receives no compensation

for such services.



Item 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND

MANAGEMENT

(a) Security Ownership of Certain Beneficial Owners - As of

December 31, 1999 there were no persons known to be beneficial

owners of more than 5 percent of the Units.



(b) Security Ownership of Management - At December 31, 1999,

Demeter owned 100 Units of General Partnership Interest

representing a 1.39 percent interest in the Partnership.



(c) Changes in Control - None



Item 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Refer to Note 2 - "Related Party Transactions" of "Notes to

Financial Statements", in the accompanying Annual Report to

Limited Partners for the year ended December 31, 1999 which is

incorporated by reference to Exhibit 13.01 of this Form 10-K. In

its capacity as the Partnership's retail commodity broker, DWR

received commodity brokerage commissions (paid and accrued by the

Partnership) of $493,558 for the year ended December 31, 1999.

In its capacity as the Partnership's trading advisor, DWFCM

received management fees of $264,552 for the year ended December

31, 1999.































PART IV

Item 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON

FORM 8-K

(a) 1. Listing of Financial Statements

The following financial statements and report of independent

auditors, all appearing in the accompanying Annual Report to

Limited Partners for the year ended December 31, 1999, are

incorporated by reference to Exhibit 13.01 of this Form 10-K:

- - Report of Deloitte & Touche LLP, independent auditors, for
the years ended December 31, 1999, 1998 and 1997.

- - Statements of Financial Condition as of December 31, 1999
and 1998.

- - Statements of Operations, Changes in Partners' Capital, and
Cash Flows for the years ended December 31, 1999, 1998 and
1997.

- - Notes to Financial Statements.


With the exception of the aforementioned information and the

information incorporated in Items 7, 8 and 13, the Annual Report

to Limited Partners for the year ended December 31, 1999 is not

deemed to be filed with this report.



2. Listing of Financial Statement Schedules

No financial statement schedules are required to be filed with

this report.



(b) Reports on Form 8-K

No reports on Form 8-K have been filed by the Partnership during

the last quarter of the period covered by this report.



(c) Exhibits

Refer to Exhibit Index on Page E-1.



SIGNATURES

Pursuant to the requirements of Sections 13 or 15(d) of the
Securities Exchange Act of 1934, the registrant has duly caused
this report to be signed on its behalf by the undersigned,
thereunto duly authorized.

DEAN WITTER MULTI-
MARKET PORTFOLIO L.P.
(Registrant)

BY: Demeter
Management Corporation,
General
Partner

March 29, 2000 BY: /s/ Robert E. Murray
Robert E. Murray, Director,
Chairman of the Board and
President

Pursuant to the requirements of the Securities Exchange Act of
1934, this report has been signed below by the following persons
on behalf of the registrant and in the capacities and on the
dates indicated.

Demeter Management Corporation.

BY: /s/ Robert E. Murray ____ March 29,
2000
Robert E. Murray, Director,
Chairman of the Board and
President

/s/ Joseph G. Siniscalchi ___ March 29,
2000
Joseph G. Siniscalchi, Director

/s/ Edward C. Oelsner III ___ March 29,
2000
Edward C. Oelsner III, Director

/s/ Mitchell M. Merin _______ March 29, 2000
Mitchell M. Merin, Director

/s/ Richard A. Beech ________ March 29, 2000
Richard A. Beech, Director

/s/ Ray Harris ___ March 29,
2000
Ray Harris, Director

/s/ Lewis A. Raibley, III ___ March 29,
2000
Lewis A. Raibley, III, Director, Chief
Financial Officer and Principal
Accounting Officer


EXHIBIT INDEX

Item

3.01 Limited Partnership Agreement of the Partnership, dated as
of June 24, 1988 is incorporated by reference to Exhibit
3.01 and Exhibit 3.02 of the Partnership's Registration
Statement on Form S-1 (File No. 33-21532).

19.01 Supplemental Information Regarding DWFCM dated August 27,
1993 is incorporated by reference to Exhibit 19 of
the Partnership's Annual Report on Form 10-K for the
fiscal year ended December 31, 1993.

13.01 December 31, 1999 Annual Report to Limited Partners is
filed herewith.







Multi-
Market
Portfolio

December 31, 1999
Annual Report

MORGAN STANLEY DEAN WITTER


Demeter Management Corporation
Two World Trade Center
62nd Floor
New York, NY 10048
Telephone (212) 392-8899

Dean Witter Multi-Market Portfolio L.P.
(formerly, Dean Witter Principal Guaranteed Fund)
Annual Report 1999

Dear Limited Partner:

This marks the twelfth annual report for the Dean Witter Multi-Market Portfolio
L.P. (the "Fund"). The Fund began the year at a Net Asset Value per Unit of
$1,205.86 and finished the year at a Net Asset Value per Unit of $1,100.09, re-
flecting a loss of 8.8%. Since its inception in September 1988, the Fund has
increased by 10.0% (a compound annualized return of 0.8%).

Overall, the Fund experienced difficulty in the global interest rate futures
markets primarily from short Australian interest rate futures positions as
prices increased during July and August on the temporary strength in U.S. bonds
and weaker-than-expected business spending data out of Australia. Additional
losses were recorded from short Japanese bond futures positions as prices in-
creased during the first quarter and third quarter. In the currency markets,
losses were recorded throughout a majority of the first quarter from long Aus-
tralian dollar positions as its value dropped significantly relative to the
U.S. dollar on speculation regarding potential currency devaluations in the
Asian region. Early in the third quarter, losses were recorded from long posi-
tions in this currency due to depressed commodities prices, emerging market
concerns and on-going talks that China may eventually devalue its currency.
Newly established short positions in the Australian dollar resulted in addi-
tional losses during September as its value strengthened relative to the U.S.
dollar following the rally in gold prices. Offsetting currency gains were rec-
orded during the third quarter from long positions in the Japanese yen as the
value of the yen climbed to a 44-month high versus the U.S. dollar due to con-
tinued optimism over Japan's economic recovery. The energy markets were profit-


able during March from long positions in oil futures as prices moved signifi-
cantly higher on news that both OPEC and non-OPEC countries had reached an
agreement to cut total output beginning April 1st. Gains were also recorded in
this market during the third quarter after OPEC ministers confirmed that they
would uphold their global cutbacks until April of 2000.

While we are disappointed that the Fund had a difficult year in 1999, we remind
investors that managed futures funds such as Multi-Market Portfolio are de-
signed to provide diversification and non-correlation, that is the ability to
perform independently, of global equities and bonds. Managed futures have his-
torically performed independently of traditional investments, such as stocks
and bonds. Managed futures have historically performed independently of tradi-
tional investments, such as stocks and bonds. This is referred to as non-corre-
lation, or the potential for managed futures to perform when traditional mar-
kets such as stocks and bonds may experience difficulty performing. Of course,
managed futures funds will not automatically be profitable during unfavorable
periods for these traditional investments and vice versa. The degree of non-
correlation of any given managed futures fund will vary, particularly as a re-
sult of market conditions, and some funds will have significantly lesser de-
grees of non-correlation (i.e., greater correlation) with stocks and bonds than
others. 1999 proved to be another strong year for equities, due in large part
to continued growth and stability in most major world economies accompanied by
low inflation. This environment, while strong for equities, provided few major
sustained price trends in the world's futures and currency markets, and as
such, a difficult trading environment for the money manager in this Fund whose
trading strategy relies on the existence of longer-term price trends for trad-
ing opportunities. Nevertheless, we remain confident in the role that managed
futures investments play in the overall investment portfolio, and we believe
this confidence is well-founded based on the longer-term diversified non-corre-
lated returns of this alternative investment. Demeter Management Corporation,
as General Partner to the Fund, has been and continues to be an active investor
with more than $18 million invested among the 24 man-


aged futures funds to which we act as General Partner.

Should you have any questions concerning this report, please feel free to con-
tact Demeter Management Corporation at Two World Trade Center, 62nd Floor, New
York, NY 10048, or your Morgan Stanley Dean Witter Financial Advisor.

I hereby affirm, that to the best of my knowledge and belief, the information
contained in this report is accurate and complete. Past performance is not a
guarantee of future results.

Sincerely,


/s/ Robert E. Murray

Robert E. Murray
Chairman
Demeter Management Corporation
General Partner


Dean Witter Multi-Market Portfolio L.P.
Independent Auditors' Report

The Limited Partners and the General Partner:

We have audited the accompanying statements of financial condition of Dean Wit-
ter Multi-Market Portfolio L.P. (formerly Dean Witter Principal Guaranteed Fund
L.P.) (the "Partnership") as of December 31, 1999 and 1998 and the related
statements of operations, changes in partners' capital, and cash flows for each
of the three years in the period ended December 31, 1999. These financial
statements are the responsibility of the Partnership's management. Our respon-
sibility is to express an opinion on these financial statements based on our
audits.

We conducted our audits in accordance with generally accepted auditing stan-
dards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of materi-
al misstatement. An audit includes examining, on a test basis, evidence sup-
porting the amounts and disclosures in the financial statements. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement pre-
sentation. We believe that our audits provide a reasonable basis for our opin-
ion.

In our opinion, such financial statements present fairly, in all material re-
spects, the financial position of Dean Witter Multi-Market Portfolio L.P. at
December 31, 1999 and 1998 and the results of its operations and its cash flows
for each of the three years in the period ended December 31, 1999 in conformity
with generally accepted accounting principles.


/s/ Deloitte & Touche LLP

February 14, 2000
(March 3, 2000 as to Note 5)
New York, New York


Dean Witter Multi-Market Portfolio L.P.
Statements of Financial Condition



December 31,
--------------------
1999 1998
--------- ----------
$ $

ASSETS
Equity in futures interests trading accounts:
Cash 7,643,949 9,760,647
Net unrealized gain on open contracts 358,067 263,650
--------- ----------
Total Trading Equity 8,002,016 10,024,297
Interest receivable (DWR) 28,719 30,027
Due from DWR -- 214
--------- ----------
Total Assets 8,030,735 10,054,538
========= ==========
LIABILITIES AND PARTNERS' CAPITAL
LIABILITIES
Redemptions payable 108,909 57,282
Accrued management fee (DWFCM) 20,077 25,136
--------- ----------
Total Liabilities 128,986 82,418
--------- ----------
PARTNERS' CAPITAL
Limited Partners (7,082.809 and 8,169.739 Units,
respectively) 7,791,740 9,851,534
General Partner (100 Units) 110,009 120,586
--------- ----------
Total Partners' Capital 7,901,749 9,972,120
--------- ----------
Total Liabilities and Partners' Capital 8,030,735 10,054,538
========= ==========
NET ASSET VALUE PER UNIT 1,100.09 1,205.86
========= ==========







The accompanying notes are an integral part of these financial statements.


Dean Witter Multi-Market Portfolio L.P.
Statements of Operations



For the Years Ended
December 31,
-------------------------------
1999 1998 1997
-------- ---------- ---------
$ $ $

REVENUES
Trading profit (loss):
Realized (473,435) 2,510,342 552,341
Net change in unrealized 94,417 (1,434,215) 1,476,857
-------- ---------- ---------
Total Trading Results (379,018) 1,076,127 2,029,198
Interest income (DWR) 326,112 378,635 446,877
-------- ---------- ---------
Total Revenues (52,906) 1,454,762 2,476,075
-------- ---------- ---------
EXPENSES
Brokerage commissions (DWR) 493,558 564,599 675,853
Management fee (DWFCM) 264,552 305,385 341,705
Transaction fees and costs 37,858 43,914 64,968
-------- ---------- ---------
Total Expenses 795,968 913,898 1,082,526
-------- ---------- ---------
Net Income (Loss) (848,874) 540,864 1,393,549
======== ========== =========
Net Income (Loss) Allocation:
Limited Partners (838,297) 515,914 1,352,583
General Partner (10,577) 24,950 40,966
Net Income (Loss) per Unit:
Limited Partners (105.77) 64.23 133.87
General Partner (105.77) 64.23 133.87


Statements of Changes in Partners' Capital
For the Years Ended December 31, 1999, 1998 and 1997




Units of
Partnership Limited General
Interest Partners Partner Total
----------- ---------- -------- ----------
$ $ $

Partners' Capital, December 31,
1996 11,845.388 11,628,908 308,374 11,937,282
Net income -- 1,352,583 40,966 1,393,549
Redemptions (2,384.523) (2,529,988) -- (2,529,988)
---------- ---------- -------- ----------
Partners' Capital, December 31,
1997 9,460.865 10,451,503 349,340 10,800,843
Net income -- 515,914 24,950 540,864
Redemptions (1,191.126) (1,115,883) (253,704) (1,369,587)
---------- ---------- -------- ----------
Partners' Capital, December 31,
1998 8,269.739 9,851,534 120,586 9,972,120
Net loss -- (838,297) (10,577) (848,874)
Redemptions (1,086.930) (1,221,497) -- (1,221,497)
---------- ---------- -------- ----------
Partners' Capital, December 31,
1999 7,182.809 7,791,740 110,009 7,901,749
========== ========== ======== ==========


The accompanying notes are an integral part of these financial statements.


Dean Witter Multi-Market Portfolio L.P.
Statements of Cash Flows



For the Years Ended
December 31,
----------------------------------
1999 1998 1997
---------- ---------- ----------
$ $ $

CASH FLOWS FROM
OPERATING ACTIVITIES
Net income (loss) (848,874) 540,864 1,393,549
Noncash item included in net income
(loss):
Net change in unrealized (94,417) 1,434,215 (1,476,857)
(Increase) decrease in operating assets:
Interest receivable (DWR) 1,308 4,321 6,874
Due from DWR 214 8,044 (6,630)
Increase (decrease) in operating
liabilities:
Accrued management fee (DWFCM) (5,059) (2,452) (2,831)
Accrued brokerage commissions (DWR) -- -- (14,948)
Accrued transaction fees and costs -- -- (2,350)
---------- ---------- ----------
Net cash provided by (used for) operating
activities (946,828) 1,984,992 (103,193)
---------- ---------- ----------
CASH FLOWS FROM FINANCING ACTIVITIES
Increase (decrease) in redemptions
payable 51,627 (149,581) 21,899
Redemptions of Units (1,221,497) (1,369,587) (2,529,988)
---------- ---------- ----------
Net cash used for financing activities (1,169,870) (1,519,168) (2,508,089)
---------- ---------- ----------
Net increase (decrease) in cash (2,116,698) 465,824 (2,611,282)
Balance at beginning of period 9,760,647 9,294,823 11,906,105
---------- ---------- ----------
Balance at end of period 7,643,949 9,760,647 9,294,823
========== ========== ==========

The accompanying notes are an integral part of these financial statements.


Dean Witter Multi-Market Portfolio L.P.
Notes to Financial Statements

1. Summary of Significant Accounting Policies

Organization--Dean Witter Multi-Market Portfolio L.P. (the "Partnership") is a
limited partnership organized to engage in the speculative trading of futures
contracts, forward contracts and other commodity interests (collectively,
"futures interests").

The general partner for the Partnership is Demeter Management Corporation
("Demeter"). The non-clearing commodity broker is Dean Witter Reynolds Inc.
("DWR") and an unaffiliated clearing commodity broker, Carr Futures Inc.
("Carr"), provides clearing and execution services. The Trading Advisor is Dean
Witter Futures & Currency Management Inc. ("DWFCM" or the "Trading Advisor").
Demeter, DWR and DWFCM are wholly-owned subsidiaries of Morgan Stanley Dean
Witter & Co. ("MSDW").

On May 31, 1997, Morgan Stanley Group Inc. was merged with and into Dean Wit-
ter, Discover & Co. ("DWD"). At that time DWD changed its corporate name to
Morgan Stanley, Dean Witter, Discover & Co. ("MSDWD"). Effective February 19,
1998, MSDWD changed its corporate name to Morgan Stanley Dean Witter & Co.

Demeter is required to maintain a 1% minimum interest in the equity of the
Partnership and income (losses) are shared by Demeter and the Limited Partners
based upon their proportional ownership interests.

Use of Estimates--The financial statements are prepared in accordance with gen-
erally accepted accounting principles, which require management to make esti-
mates and assumptions that affect the reported amounts in the financial state-
ments and related disclosures. Management believes that the estimates utilized
in the preparation of the financial statements are prudent and reasonable. Ac-
tual results could differ from those estimates.

Revenue Recognition--Futures interests are open commitments until settlement
date. They are valued at market on a daily basis and the resulting net change
in unrealized gains and losses are reflected in the change in unrealized profit
(loss) on open contracts from one period to the next in the statements of oper-
ations. Monthly, DWR pays the Partnership interest income based upon 80% of the
average daily Net Assets for the month at a rate equal to the average yield on
13-week U.S. Treasury bills. For purposes of such interest payments, Net Assets
do not include monies due the Partnership on futures interests, but not actual-
ly received.

Net Income (Loss) per Unit--Net income (loss) per unit of limited partnership
interest ("Unit(s)") is com-


Dean Witter Multi-Market Portfolio L.P.
Notes to Financial Statements--(Continued)

puted using the weighted average number of Units outstanding during the period.

Equity in Futures Interests Trading Accounts--The Partnership's asset "Equity
in futures interests trading accounts," reflected in the statements of finan-
cial condition, consists of (A) cash on deposit with DWR and Carr to be used as
margin for trading and (B) net unrealized gains or losses on open contracts,
which are valued at market, and calculated as the difference between original
contract value and market value.

The Partnership, in the normal course of business, enters into various con-
tracts with Carr acting as its commodity broker. Pursuant to brokerage agree-
ments with Carr, to the extent that such trading results in unrealized gains or
losses, the amounts are offset and reported on a net basis on the Partnership's
statements of financial condition.

The Partnership has offset the fair value amounts recognized for forward con-
tracts executed with the same counterparty as allowable under terms of the mas-
ter netting agreement with Carr, the sole counterparty on such contracts. The
Partnership has consistently applied its right to offset.

Brokerage Commissions and Related Transaction Fees and Costs--Brokerage commis-
sions are accrued on a half-turn basis at 80% of DWR's published non-member
rates. Transaction fees and costs are accrued on a half-turn basis. Total bro-
kerage commissions, transaction fees and costs are capped at 13/20 of 1% (a
7.8% maximum annual rate) per month of the Partnership's month-end Net Assets.

Operating Expenses--The Partnership incurs a monthly management fee and may in-
cur an incentive fee. Demeter and/or DWR bear all other operating expenses.

Redemptions--Limited Partners may redeem some or all of their Units at 100% of
the Net Asset Value per Unit as of the last day of any month upon five business
days advance notice by redemption form to Demeter.

Distributions--Distributions, other than redemptions of Units, are made on a
pro-rata basis at the sole discretion of Demeter. No distributions have been
made to date.

Income Taxes--No provision for income taxes has been made in the accompanying
financial statements, as partners are individually responsible for reporting
income or loss based upon their respective share of the Partnership's revenues
and expenses for income tax purposes.


Dean Witter Multi-Market Portfolio L.P.
Notes to Financial Statements--(Continued)

Dissolution of the Partnership--The Partnership will terminate on December 31,
2025 or at an earlier date if certain conditions set forth in the Limited Part-
nership Agreement occur.

2. Related Party Transactions

The Partnership pays brokerage commissions to DWR as described in Note 1. The
Partnership's cash is on deposit with DWR and Carr in futures interests trading
accounts to meet margin requirements as needed. DWR pays interest on these
funds as described in Note 1.

Demeter, on behalf of the Partnership and itself, has entered into a Management
Agreement with DWFCM to make all trading decisions for the Partnership.

Compensation to DWFCM by the Partnership consists of a management fee and an
incentive fee as follows:

Management Fee--As of the last day of each month, the Partnership pays a month-
ly management fee equal to 1/4 of 1% (a 3% annual rate) of the Partnership's
adjusted Net Assets, as defined, that are allocated to futures interest trading
accounts which DWFCM trades on behalf of the Partnership.

Incentive Fee--The Partnership will pay a quarterly incentive fee equal to 15%
of the trading profits earned by the Partnership as of the end of each calendar
quarter. Trading profits represent the amount by which profits from futures,
forwards and options trading exceed losses after brokerage commissions, manage-
ment fees and transaction fees and costs have been deducted. No incentive fee
will be paid until the existing trading loss carryforward (adjusted for
redemptions) has been recovered.

3. Financial Instruments

The Partnership trades futures contracts, forward contracts and other commodity
interests. Futures and forwards represent contracts for delayed delivery of an
instrument at a specified date and price. Risk arises from changes in the value
of these contracts and the potential inability of counterparties to perform un-
der the terms of the contracts. There are numerous factors which may signifi-
cantly influence the market value of these contracts, including interest rate
volatility.

In June 1998, the Financial Accounting Standards Board ("FASB") issued State-
ment of Financial Accounting Standard ("SFAS") No. 133, "Accounting for Deriva-
tive Instruments and Hedging Activities" effective for fiscal years beginning
after June 15, 1999. In June 1999, the FASB issued SFAS No. 137, "Accounting
for Derivative Investments and Hedging Activities--Deferral of the Effective
Date of SFAS No. 133," which defers the re-


Dean Witter Multi-Market Portfolio L.P.
Notes to Financial Statements--(Continued)

quired implementation of SFAS No. 133 until fiscal years beginning after June
15, 2000. However, the Partnership had previously elected to adopt the provi-
sions of SFAS No. 133 beginning with the fiscal year ended December 31, 1998.
SFAS No. 133 supercedes SFAS No. 119 and No. 105, which required the disclosure
of average aggregate fair values and contract/notional values, respectively, of
derivative financial instruments for an entity which carries its assets at fair
value. The application of SFAS No. 133 does not have a significant effect on
the Partnership's financial statements.

The net unrealized gains on open contracts are reported as a component of "Eq-
uity in futures interests trading accounts" on the statements of financial con-
dition and totaled $358,067 and $263,650 at December 31, 1999 and 1998, respec-
tively.

Of the $358,067 net unrealized gain on open contracts at December 31, 1999,
$327,051 related to exchange-traded futures contracts and $31,016 related to
off-exchange-traded forward currency contracts.

Of the $263,650 net unrealized gain on open contracts at December 31, 1998,
$638,989 related to exchange-traded futures contracts and $(375,339) related to
off-exchange-traded forward currency contracts.

Exchange-traded futures contracts held by the Partnership at December 31, 1999
and 1998 mature through September 2000 and June 1999, respectively. Off-
exchange-traded forward currency contracts held by the Partnership at December
31, 1999 and December 31, 1998 mature through March 2000, and April 1999, re-
spectively.

The Partnership has credit risk associated with counterparty nonperformance.
The credit risk associated with the instruments in which the Partnership is in-
volved is limited to the amounts reflected in the Partnership's statements of
financial condition.

The Partnership also has credit risk because DWR and Carr act as the futures
commission merchants or the counterparties, with respect to most of the Part-
nership's assets. Exchange-traded futures contracts are marked to market on a
daily basis, with variations in value settled on a daily basis. Each of DWR and
Carr, as a futures commission merchant for the Partnership's exchange-traded
futures contracts, are required, pursuant to regulations of the Commodity
Futures Trading Commission to segregate from their own assets, and for the sole
benefit of their commodity customers, all funds held by them with respect to
exchange-traded futures contracts, including an amount equal to the
net unrealized gains on


Dean Witter Multi-Market Portfolio L.P.
Notes to Financial Statements--(Continued)

all open futures contracts, which funds, in the aggregate, totaled $7,971,000
and $10,399,636 at December 31, 1999 and 1998, respectively. With respect to
the Partnership's off-exchange-traded forward currency contracts, there are no
daily settlements of variations in value nor is there any requirement that an
amount equal to the net unrealized gain on open forward contracts be segregat-
ed. With respect to those off-exchange-traded forward currency contracts, the
Partnership is at risk to the ability of Carr, the sole counterparty on all of
such contracts, to perform. The Partnership has a netting agreement with Carr.
This agreement, which seeks to reduce both the Partnership's and Carr's expo-
sure on off-exchange-traded forward currency contracts, should materially de-
crease the Partnership's credit risk in the event of Carr's bankruptcy or in-
solvency. Carr's parent, Credit Agricole Indosuez, has guaranteed to the Part-
nership payment of the net liquidating value of the Partnership's account with
Carr (including foreign currency contracts).

4. Legal Matters

The class actions first filed in 1996 in California and in New York State
courts were each dismissed in 1999. On September 6, 10, and 20, 1996, and on
March 13, 1997, purported class actions were filed in the Superior Court of the
State of California, County of Los Angeles, on behalf of all purchasers of in-
terests in limited partnership commodity pools sold by DWR. Named defendants
include DWR, Demeter, DWFCM, MSDW, certain limited partnership commodity pools
of which Demeter is the general partner (all such parties referred to hereafter
as the "Morgan Stanley Dean Witter Parties") and certain trading advisors to
those pools. On June 16, 1997, the plaintiffs in the above actions filed a con-
solidated amended complaint, alleging, among other things, that the defendants
committed fraud, deceit, negligent misrepresentation, various violations of the
California Corporations Code, intentional and negligent breach of fiduciary du-
ty, fraudulent and unfair business practices, unjust enrichment, and conversion
in the sale and operation of the various limited partnership commodity pools.
The complaints seek unspecified amounts of compensatory and punitive damages
and other relief. The court entered an order denying class certification on Au-
gust 24, 1999. On September 24, 1999, the court entered an order dismissing the
case without prejudice on consent. Similar purported class actions were also
filed on September 18 and 20, 1996, in the Supreme Court of the State of New
York, New York County, and on November 14, 1996 in the Superior Court of the
State of Delaware, New Castle County, against the Morgan Stanley Dean Witter
Parties and certain trading advisors on behalf of all purchasers of interests
in various limited partnership commodity pools sold by DWR. A consolidated and
amended com-


Dean Witter Multi-Market Portfolio L.P.
Notes to Financial Statements--(Concluded)

plaint in the action pending in the Supreme Court of the State of New York was
filed on August 13, 1997, alleging that the defendants committed fraud, breach
of fiduciary duty, and negligent misrepresentation in the sale and operation of
the various limited partnership commodity pools. The complaints seek unspeci-
fied amounts of compensatory and punitive damages and other relief. The New
York Supreme Court dismissed the New York action in November 1998, but granted
plaintiffs leave to file an amended complaint, which they did in early December
1998. The defendants filed a motion to dismiss the amended complaint with prej-
udice on February 1, 1999. By decision dated December 21, 1999, the New York
Supreme Court dismissed the case with prejudice.

In addition, on December 16, 1997, upon motion of the plaintiffs, the action
pending in the Superior Court of the State of Delaware was voluntarily dis-
missed without prejudice.

5. Subsequent Event

On March 3, 2000, the plaintiffs in the New York action referred to in Note 4
filed an appeal of the order dismissing the consolidated complaint.


MORGAN STANLEY DEAN WITTER & CO.
Two World Trade Center
62nd Floor
New York, NY 10048

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