WITTER DEAN CORNERSTONE FUND III - 10-Q Quarterly Report

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

FORM 10-Q

[X] Quarterly report pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
For the quarterly period ended June 30, 2002 or

[ ] Transition report pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
For the transition period from to __________________

Commission File No. 0-13299

DEAN WITTER CORNERSTONE FUND III

(Exact name of registrant as specified in its charter)

New York 13-3190919
(State or other jurisdiction of (I.R.S. Employer
incorporation or organization) Identification No.)

Demeter Management Corporation
c/o Managed Futures Department
825 Third Avenue, 8th Floor, New York, NY 10022
(Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code (201) 209-8400

(Former name, former address, and former fiscal year, if changed
since last report)

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___________

DEAN WITTER CORNERSTONE FUND III

INDEX TO QUARTERLY REPORT ON FORM 10-Q

June 30, 2002

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

DEAN WITTER CORNERSTONE FUND III
STATEMENTS OF FINANCIAL CONDITION

DEAN WITTER CORNERSTONE FUND III
STATEMENTS OF OPERATIONS
(Unaudited)

DEAN WITTER CORNERSTONE FUND III
STATEMENTS OF OPERATIONS
(Unaudited)

DEAN WITTER CORNERSTONE FUND III
STATEMENTS OF CHANGES IN PARTNERS' CAPITAL
For the Six Months Ended June 30, 2002 and 2001
(Unaudited)

DEAN WITTER CORNERSTONE FUND III
STATEMENTS OF CASH FLOWS
(Unaudited)

DEAN WITTER CORNERSTONE FUND III
NOTES TO FINANCIAL STATEMENTS
June 30, 2002
(Unaudited)

The unaudited financial statements contained herein include, in
the opinion of management, all adjustments necessary for a fair
presentation of the results of operations and financial condition
of Dean Witter Cornerstone Fund III (the "Partnership"). The
financial statements and condensed notes herein should be read in
conjunction with the Partnership's December 31, 2001 Annual Report
on Form 10-K.

1. Organization
Dean Witter Cornerstone Fund III is a New York limited partnership
organized to engage primarily in the speculative trading of
futures contracts, options on futures contracts, and forward
contracts on foreign currencies and other commodity interests. The
Partnership is one of the Dean Witter Cornerstone Funds, comprised
of Dean Witter Cornerstone Fund II, the Partnership, and Dean
Witter Cornerstone Fund IV.

The general partner of the Partnership is Demeter Management
Corporation ("Demeter"). The non-clearing commodity broker is
Morgan Stanley DW Inc. ("Morgan Stanley DW"). The clearing

DEAN WITTER CORNERSTONE FUND III
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

commodity brokers are Morgan Stanley & Co. Inc. ("MS & Co.") and
Morgan Stanley & Co. International Limited ("MSIL"). Demeter,
Morgan Stanley DW, MS & Co. and MSIL are wholly-owned subsidiaries
of Morgan Stanley. The trading managers to the Partnership are
Welton Investment Corporation and Sunrise Capital Management Inc.
(collectively, the "Trading Managers").

Effective June 20, 2002 Morgan Stanley Dean Witter & Co. changed
its name to Morgan Stanley.

2. Related Party Transactions
The Partnership's cash is on deposit with Morgan Stanley DW, MS &
Co. and MSIL in futures, forwards, and options trading accounts to
meet margin requirements as needed. Morgan Stanley DW pays
interest on these funds based on current 13-week U.S. Treasury
bill rates. The Partnership pays brokerage commissions to Morgan
Stanley DW.

3. Financial Instruments
The Partnership trades futures contracts, options on futures
contracts, and forward contracts on foreign currencies and other
commodity interests. Futures and forwards represent contracts for

DEAN WITTER CORNERSTONE FUND III
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

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 under the terms
of the contracts. There are numerous factors which may
significantly influence the market value of these contracts,
including interest rate volatility.

The market value of contracts is based on closing prices quoted
by the exchange, bank or clearing firm through which the
contracts are traded.

The Partnership's contracts are accounted for on a trade-date
basis and marked to market on a daily basis. The Partnership
accounts for its derivative investments in accordance with the
provisions of Statement of Financial Accounting Standard No. 133,
"Accounting for Derivative Instruments and Hedging Activities"
("SFAS No. 133"). SFAS No. 133 defines a derivative as a
financial instrument or other contract that has all three of the
following characteristics:

1) One or more underlying notional amounts or payment
provisions;

DEAN WITTER CORNERSTONE FUND III
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

2) Requires no initial net investment or a smaller initial net
investment than would be required relative to changes in
market factors;
3) Terms require or permit net settlement.

Generally derivatives include futures, forward, swaps or options
contracts and other financial instruments with similar
characteristics such as caps, floors and collars.

The net unrealized gains (losses) on open contracts, reported as a
component of "Equity in futures interests trading accounts" on the
statements of financial condition, and their longest contract
maturities were as follows:

Net Unrealized Gains (Losses)
on Open Contracts Longest Maturities
Off- Off-
Exchange- Exchange- Exchange- Exchange-
Date Traded Traded Total Traded Traded
$ $ $

Jun. 30, 2002 1,351,652 1,226,421 2,578,073 Jun. 2003 Sep. 2002
Dec. 31, 2001 (679,746) 752,314 72,568 Dec. 2002 Mar. 2002

DEAN WITTER CORNERSTONE FUND III
NOTES TO FINANCIAL STATEMENTS (CONTINUED)

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

The Partnership also has credit risk because Morgan Stanley DW, MS
& Co. and MSIL act as the futures commission merchants or the
counterparties with respect to most of the Partnership's assets.
Exchange-traded futures and futures-styled options contracts are
marked to market on a daily basis, with variations in value
settled on a daily basis. Morgan Stanley DW, MS & Co., and MSIL,
each as a futures commission merchant for all of the Partnership's
exchange-traded futures and futures-styled options contracts, are
required, pursuant to regulations of the Commodity Futures Trading
Commission ("CFTC"), 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 and futures-styled
options contracts, including an amount equal to the net unrealized
gains (losses) on all open futures and futures-styled options
contracts, which funds, in the aggregate, totaled $24,976,976 and
$25,791,768 at June 30, 2002 and December 31, 2001, respectively.
With respect to the Partnership's off-exchange-traded forward
currency contracts, there are no daily settlements of variations

DEAN WITTER CORNERSTONE FUND III
NOTES TO FINANCIAL STATEMENTS (CONCLUDED)

in value nor is there any requirement that an amount equal to the
net unrealized gains (losses) on open forward contracts be
segregated. With respect to those off-exchange-traded forward
currency contracts, the Partnership is at risk to the ability of
MS & Co., the sole counterparty on all of such contracts, to
perform. The Partnership has a netting agreement with MS & Co.
This agreement, which seeks to reduce both the Partnership's and
MS & Co.'s exposure on off-exchange-traded forward currency
contracts, should materially decrease the Partnership's credit
risk in the event of MS & Co.'s bankruptcy or insolvency.

Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS

Liquidity - The Partnership deposits its assets with Morgan
Stanley DW as non-clearing broker and MS & Co. and MSIL as
clearing brokers in separate futures, forwards, and options
trading accounts established for each Trading Manager, 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 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, forwards, and options, it is expected that the
Partnership will continue to own such liquid assets for margin
purposes.

The Partnership's investment in futures, forwards, and options
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 or options contract
has increased or decreased by an amount equal to the daily limit,
positions in that futures or options 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 or options 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, subjecting it to
substantial losses. Either of these market conditions could
result in restrictions on redemptions.

There are no material trends, events or uncertainties known at the
present time that will result in or that are reasonably likely to
result in the Partnership's liquidity increasing or decreasing in
any material way.

The Partnership has never had illiquidity affect a material
portion of its assets.

The Partnership has no off-balance sheet arrangements, nor
contractual obligations or commercial commitments to make future
payments that would affect the Partnership's liquidity or capital
resources. The contracts traded by the Partnership are accounted
for on a trade-date basis and marked to market on a daily basis.
The value of foreign currency forward contracts is based on the
spot rate as of the close of business, New York City time, on a
given day.

Capital Resources. The Partnership does not have, nor expect to
have, any capital assets. Redemptions of additional units of
limited partnership interest ("Unit(s)") in the future will affect
the amount of funds available for investment in futures, forwards,
and options in subsequent periods. It is not possible to estimate
the amount and therefore the impact of future redemptions of
Units.

There are no known material trends, favorable or unfavorable, nor
any expected material changes to the Partnership's capital
resource arrangements at the present time.

Results of Operations
General. The Partnership's results depend on the Trading Managers
and the ability of the Trading Managers' 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 and six
month periods ended June 30, 2002 and 2001 and a general
discussion of its trading activities during each period. It is
important to note, however, that the Trading Managers trade 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 Managers 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 the Trading
Managers' trading activities on behalf of the Partnership and how
the Partnership has performed in the past.

The Partnership's results of operations are set forth in
financial statements prepared in accordance with United States
generally accepted accounting principles, which require the use
of certain accounting policies that affect the amounts reported
in these financial statements, including the following. The
contracts the Partnership trades are accounted for on a trade-
date basis and marked to market on a daily basis. The difference
between their cost and market value is recorded on the Statements
of Operations as "Net change in unrealized profit/loss" for open
(unrealized) contracts, and recorded as "Realized profit/loss"
when open positions are closed out, and the sum of these amounts
constitutes the Partnership's trading revenues. Earned interest

income revenue, as well as management fees, incentive fees and
brokerage expenses of the Partnership are recorded on an accrual
basis. Demeter believes that, based on the nature of the
operations of the Partnership, no assumptions other than those
presently used relating to the application of critical accounting
policies are reasonably plausible that could affect reported
amounts.

For the Quarter and Six Months Ended June 30, 2002
For the quarter ended June 30, 2002, the Partnership recorded
total trading revenues, including interest income, of $3,487,705
and posted an increase in net asset value per Unit. The most
significant gains of approximately 14.0% were recorded in the
currency markets primarily during May and June from previously
established long positions in euros and Swiss francs relative to
the U.S. dollar as the value of these currencies strengthened
against the dollar amid falling equity prices, concerns regarding
corporate accounting integrity and weak U.S. economic data.
Additional gains of approximately 3.6% were recorded in the global
interest rate futures markets primarily in June from long
positions in eurodollar futures as prices trended higher following
weakness in U.S. equity markets, geopolitical concerns and
uncertainty surrounding a global economic recovery. Losses of
approximately 4.1% were recorded in the energy markets primarily

during May from previously established long positions in crude oil
futures as prices moved lower on supply and demand concerns.
Total expenses for the three months ended June 30, 2002 were
$634,654, resulting in net income of $2,853,051. The net asset
value of a Unit increased from $2,814.65 at March 31, 2002 to
$3,159.95 at June 30, 2002.

For the six months ended June 30, 2002, the Partnership recorded
total trading revenues, including interest income, of $2,063,570
and posted an increase in net asset value per Unit. The most
significant gains of approximately 7.0% were recorded in the
currency markets primarily during May and June from previously
established long positions in euro and Swiss franc relative to
the U.S. dollar as the value of these currencies strengthened
against the U.S. dollar amid falling equity prices, concerns
regarding corporate accounting integrity and weak U.S. economic
data. Additional gains of approximately 1.3% were recorded in
the global interest rate futures markets primarily during June
from long positions in Japanese, U.S. and European interest rate
futures as prices trended higher following weakness in U.S.
equity markets, geopolitical concerns and uncertainty surrounding
a global economic recovery. Losses of approximately 3.1% were
recorded in the global stock index futures markets from both long
and short positions in U.S. and Japanese index futures as prices
failed to trend amidst global economic uncertainty, corporate
accounting integrity and the ongoing threat of terrorism.

Additional losses of approximately 2.4% were recorded in the
energy markets primarily during May from previously established
long positions in crude oil futures as prices moved lower
following supply and demand concerns. Total expenses for the six
months ended June 30, 2002 were $1,191,578, resulting in net
income of $871,992. The net asset value of a Unit increased from
$3,045.84 at December 31, 2001 to $3,159.95 at June 30, 2002.

For the Quarter and Six Months Ended June 30, 2001
For the quarter ended June 30, 2001, the Partnership recorded
total trading losses, net of interest income, of $3,067,591 and
posted a decrease in net asset value per Unit. The most
significant losses of approximately 6.5% were recorded in the
global interest rate futures markets primarily during early April
from long positions in U.S. interest rate futures as bond prices
reversed sharply lower as investors deserted risk-free government
securities in an asset shift to equities. Losses were also
recorded during April from long positions in European interest
rate futures as prices moved lower on reports of the European
Central Bank's decision to leave interest rates on hold. During
late June, additional losses were recorded from long positions in
U.S. interest rate futures as prices dropped because of the dim
outlook for further aggressive interest rate cuts by the U.S.
Federal Reserve. In the currency markets, losses of approximately
3.2% were recorded primarily during early April and May from short
positions in the Japanese yen as its value reversed higher versus

the U.S. dollar sparked by optimism towards reform for the
weakened Japanese economy. During early June, additional losses
were experienced from long positions in the Japanese yen as its
value reversed lower after showing signs of strengthening in May.
In the metals markets, losses of approximately 1.6% were recorded
during late April from short gold futures positions as prices
climbed higher on the weakness of the U.S. dollar. During late
May, losses were experienced from newly established long gold
futures positions as prices reversed sharply lower following the
return of more bearish sentiment regarding the outlook for the
U.S. economy. These losses were partially offset by gains of
approximately 0.2% recorded in the soft commodities markets
throughout a majority of the quarter from short cotton futures
positions as prices moved lower due to declining demand. In the
agricultural markets, profits of approximately 0.2% were recorded
from short corn futures positions as prices declined on forecasts
for favorable weather conditions in the U.S. midwest and on
reports of declining demand. Total expenses for the three months
ended June 30, 2001 were $657,273, resulting in a net loss of
$3,724,864. The net asset value of a Unit decreased from
$3,312.44 at March 31, 2001 to $2,902.51 at June 30, 2001.

For the six months ended June 30, 2001, the Partnership recorded
total trading revenues, including interest income, of $111,315
and, after expenses, posted a decrease in net asset value per
Unit. The most significant losses of approximately 4.5% were

recorded in the energy markets throughout the first six months of
the year from positions in crude oil futures and its related
products as a result of volatility in oil prices due to a
continually changing outlook for inventory, supply, production
and demand. In the metals markets, losses of approximately 1.8%
were recorded during late April from short gold futures positions
as prices climbed higher on the weakness of the U.S. dollar.
During late May, losses were experienced from newly established
long gold futures positions as prices reversed sharply lower
following the return of more bearish sentiment regarding the
outlook for the U.S. economy. In the currency markets, losses of
approximately 1.6% were recorded from cross-rate positions in the
euro versus the Japanese yen and from positions in the Australian
dollar relative to the U.S. dollar. These losses were partially
offset by gains of approximately 3.2% recorded in the global
interest rate futures markets throughout the first quarter from
long positions in Japanese interest rate futures as prices moved
higher amid weak Japanese stock prices and disappointing economic
data in that country. In the soft commodities markets, gains of
approximately 1.3% were recorded throughout a majority of the
first and second quarters from short cotton futures positions as
prices moved lower on the weak export sales and low demand.
Total expenses for the six months ended June 30, 2001 were
$1,309,943, resulting in a net loss of $1,198,628. The net asset
value of a Unit decreased from $3,037.53 at December 31, 2000 to
$2,902.51 at June 30, 2001.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET
RISK

Introduction
The Partnership is a commodity pool engaged primarily in the
speculative trading of futures, forwards, and options. 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, forwards, and options traded by the Partnership
involve varying degrees of related 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 on the basis of 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 its
cash flow. Profits and losses on open positions of exchange-
traded futures, forwards, and options are settled daily through
variation margin.

The Partnership's risk exposure in the market sectors traded by
the Trading Managers 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 Partner-
ship'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.
In other words, one-day VaR for a portfolio is a number such that
losses in this portfolio are estimated to exceed the VaR only one
day in 100.

VaR is calculated using historical simulation. Demeter uses
approximately four years of daily market data (1,000 observations)
and revalues its portfolio (using delta-gamma approximations) for
each of the historical market moves that occurred over this time
period. This generates a probability distribution of daily
'simulated profit and loss' outcomes. The VaR is the appropriate
percentile of this distribution. For example, the 99% one-day VaR
would represent the 10th worst outcome from Demeter's simulated
profit and loss series.

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 Managers in their daily risk management
activities. Please further note that VaR as described above may
not be comparable to similarly titled measures used by other
entities.

The Partnership's Value at Risk in Different Market Sectors
The following table indicates the VaR associated with the
Partnership's open positions as a percentage of total net assets
by primary market risk category at June 30, 2002 and 2001. At
June 30, 2002 and 2001, the Partnership's total capitalization
was approximately $26 million.

Primary Market June 30, 2002 June 30, 2001
Risk Category Value at Risk Value at Risk

Currency (2.24)% (2.37)%
Interest Rate (1.78) (1.40)
Equity (0.34) (0.08)
Commodity (0.71) (0.78)
Aggregate Value at Risk (3.00)% (3.01)%

The VaR for a market category represents the one-day downside risk
for the aggregate exposures associated with this market category.
The aggregate VaR, listed above for the Partnership, represents
the aggregate VaR of the Partnership's open positions across all
the market categories, and is less than the sum of the VaRs for
all such market categories due to the diversification benefit
across asset classes.

The table above represents the VaR of the Partnership's open
positions at June 30, 2002 and 2001 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, forwards, and
options, 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 quarter-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 July 1,
2001 through June 30, 2002.

Primary Market Risk Category High Low Average
Currency (2.71)% (0.64)% (1.61)%

Interest Rate (1.89) (0.83) (1.43)

Equity (0.50) (0.23) (0.32)

Commodity (1.75) (0.68) (1.11)

Aggregate Value at Risk (3.00)% (2.23)% (2.69)%

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 usually 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, give 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 caused by 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.

The 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 June 30, 2002 and 2001, and for the end of the
four quarterly reporting periods from July 1, 2001 through June
30, 2002. 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 once 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.

At June 30, 2002, the Partnership's cash balance at Morgan Stanley
DW was approximately 81% of its total net asset value. 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 to be 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, in relation to the Partnership's net
assets.

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 Managers
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 at June 30, 2002, by market sector. It may be
anticipated, however, that these market exposures will vary
materially over time.

Currency. The primary market exposure of the Partnership at June
30, 2002 was to the currency complex. The Partnership's currency
exposure is due to exchange rate fluctuations, primarily
fluctuations which 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 a large
number of currencies, including cross-rates - i.e., positions
between two currencies other than the U.S. dollar. At June 30,
2002, the Partnership's major exposures were to euro currency
crosses and outright U.S. dollar positions. Outright positions
consist of the U.S. dollar vs. other currencies. These other

currencies include major and minor currencies. Demeter does not
anticipate that the risk profile of the Partnership's currency
sector will change significantly in the future. 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 U.S.-based Partnership in
expressing VaR in a functional currency other than U.S. dollars.

Interest Rate. The second largest market exposure of the
Partnership at June 30, 2002 was to the global interest rate
complex. Exposure was primarily spread across Japanese, German
and U.S. interest rate sectors. Interest rate movements directly
affect the price of the sovereign bond futures 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 U.S. and the other G-7
countries. The G-7 countries consist of France, the U.S.,
Britain, Germany, Japan, Italy, and Canada. However, the
Partnership also takes futures positions in the government debt
of smaller nations- e.g., Australia. Demeter anticipates that

G-7 and Australia interest rates will remain the primary interest
rate exposure of the Partnership for the foreseeable future. The
speculative futures positions held by the Partnership may range
from short to long-term instruments. Consequently, changes in
short, medium or long-term interest rates may have an effect on
the Partnership.

Equity. The Partnership's primary equity exposure at June 30,
2002 was to equity price risk in the G-7 countries. The stock
index futures traded by the Partnership are by law limited to
futures on broadly-based indices. At June 30, 2002, the
Partnership's exposures were to the S&P 500 (U.S.), Nikkei
(Japan) and DAX (Germany) stock indices. The Partnership is
primarily exposed to the risk of adverse price trends or static
markets in the Japanese and U.S. 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.

Commodity.
Energy. At June 30, 2002, the Partnership's energy exposure
was shared primarily by futures contracts in crude oil as
well as natural gas. Price movements in these markets
result from political developments in the Middle East,
weather patterns and other economic fundamentals.

Significant profits and losses, which have been experienced
in the past, are expected to continue to be experienced in
these markets. Natural gas has exhibited volatility in
prices resulting from weather patterns and supply and demand
factors and may continue in this choppy pattern.

Metals. The Partnership's metals exposure at June 30, 2002
was to fluctuations in the price of precious metals, such as
gold, and base metals, such as nickel and copper. Economic
forces, supply and demand inequalities, geopolitical factors
and market expectations influence price movements in these
markets. The Trading Managers, from time to time, take
positions when market opportunities develop. Demeter
anticipates that the Partnership will continue to be exposed
to the precious and base metals markets.

Soft Commodities and Agriculturals. At June 30, 2002, the
Partnership had exposure to the markets that comprise these
sectors. Most of the exposure was to the soybean and corn
markets. Supply and demand inequalities, severe weather
disruptions and market expectations affect price movements
in these markets.

Qualitative Disclosures Regarding Non-Trading Risk Exposure
The following was the only non-trading risk exposure of the
Partnership at June 30, 2002:

Foreign Currency Balances. The Partnership's primary
foreign currency balances at June 30, 2002 were in Japanese
yen, euros and Swiss francs. The Partnership controls the
non-trading risk of these balances by regularly converting
them back into U.S. dollars upon liquidation of their
respective positions.

Qualitative Disclosures Regarding Means of Managing Risk Exposure
The Partnership and the Trading Managers, 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 Trading Managers, each of whose strategies focus
on different market sectors and trading approaches, and monitoring
the performance of the Trading Managers daily. In addition, the
Trading Managers establish 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 instrument, cash. Cash is the only Partnership investment
directed by Demeter, rather than the Trading Managers.

PART II. OTHER INFORMATION

Item 1. LEGAL PROCEEDINGS
None.

Item 6. EXHIBITS AND REPORTS ON FORM 8-K

(A) Exhibits

3.01 Limited Partnership Agreement of the Partnership, dated
as of December 7, 1983, as amended as of May 11, 1984, is
incorporated by reference to Exhibit 3.01 of the
Partnership's Annual Report on Form 10-K for the fiscal
year ended September 30, 1984 (File No. 0-13299).
10.01 Management Agreement among the Partnership, Demeter and
Sunrise Capital Management Inc. (formerly Sunrise
Commodities Inc.), dated as of November 15, 1983, is
incorporated by reference to Exhibit 10.03 of the
Partnership's Annual Report on Form 10-K for the fiscal
year ended September 30, 1984 (File No. 0-13299).
10.02 Management Agreement among the Partnership, Demeter and
Welton Investment Systems Corporation, dated as of July
1, 1996, is incorporated by reference to Exhibit 10.02 of
the Partnership's Annual Report on Form 10-K for the
fiscal year ended December 31, 1997 (File No. 0-13299).
10.03 Dean Witter Cornerstone Funds Exchange Agreement, dated
as of May 31, 1984, is incorporated by reference to
Exhibit 10.04 of the Partnership's Annual Report on Form
10-K for the fiscal year ended September 30, 1984 (File
No. 0-13299).
10.04 Amended and Restated Customer Agreement between the
Partnership and Morgan Stanley DW Inc., dated as of June
22, 2000, is incorporated by reference to Exhibit 10.01
of the Partnership's Form 8-K (File No. 0-13299) filed
with the Securities and Exchange Commission on November
13, 2001.
10.05 Commodity Futures Customer Agreement between Morgan
Stanley & Co. Incorporated and the Partnership, and
acknowledged and agreed to by Morgan Stanley DW Inc.,
dated as of May 1, 2000, is incorporated by reference to

Exhibit 10.02 of the Partnership's Form 8-K (File No. 0-
13299) filed with the Securities and Exchange Commission
on November 13, 2001.
10.06 Customer Agreement between the Partnership and Morgan
Stanley & Co. International Limited, dated as of May 1,
2000, is incorporated by reference to Exhibit 10.04 of
the Partnership's Form 8-K (File No. 0-13299) filed with
the Securities and Exchange Commission on November 13,
2001.
10.07 Foreign Exchange and Options Master Agreement between
Morgan Stanley & Co. Incorporated and the Partnership,
dated as of April 30, 2000, is incorporated by reference
to Exhibit 10.05 of the Partnership's Form 8-K (File No.
0-13299) filed with the Securities and Exchange
Commission on November 13, 2001.
10.09 Amendment to Management Agreement between the Partnership
and Welton Investment Corporation, dated as of November
30, 2000, is incorporated by reference to Exhibit 10.1 of
the Partnership's Form 8-K (File No. 0-13299) filed with
the Securities and Exchange Commission on January 3,
2001.
10.10 Amendment to Management Agreement between the Partnership
and Sunrise Capital Management, Inc., dated as of
November 30, 2000, is incorporated by reference to the
Partnership's Form 8-K (File No. 0-13299) filed with the
Securities and Exchange Commission on January 3, 2001.
10.11 Securities Account Control Agreement among the
Partnership, Morgan Stanley & Co. Incorporated, and
Morgan Stanley DW Inc., dated as of May 1, 2000, is
incorporated by reference to Exhibit 10.03 of the
Partnership's Form 8-K (File No. 0-13299) filed with the
Securities and Exchange Commission on November 13, 2001.
99.01 Certification of Periodic Financial Reports.

(B) Reports on Form 8-K - None.

SIGNATURE

Pursuant to the requirements 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 Cornerstone Fund III
(Registrant)

By: Demeter Management Corporation
(General Partner)

August 14, 2002 By:/s/Raymond E. Koch _
Raymond E. Koch
Chief Financial Officer

The General Partner which signed the above is the only party
authorized to act for the Registrant. The Registrant has no
principal executive officer, principal financial officer,
controller, or principal accounting officer and has no Board of
Directors.

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Dean Witter Cornerstone
Fund III (the "Partnership") on Form 10-Q for the period ended
June 30, 2002 as filed with the Securities and Exchange Commission
on the date hereof (the "Report"), I, Robert E. Murray, President,
Demeter Management Corporation, general partner of the
Partnership, certify, pursuant to 18 U.S.C. Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
that:
(1) The Report fully complies with the requirements of Section
13 or 15(d) of the Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents,
in all material respects, the financial condition and
results of operations of the Partnership.

By: /s/ Robert E. Murray

Name: Robert E. Murray
Title: Chairman of the Board and President

Date: August 13, 2002

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Dean Witter Cornerstone
Fund III (the "Partnership") on Form 10-Q for the period ended
June 30, 2002 as filed with the Securities and Exchange Commission
on the date hereof (the "Report"), I, Raymond E. Koch, Chief
Financial Officer, Demeter Management Corporation, general partner
of the Partnership, certify, pursuant to 18 U.S.C. Section 1350,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002, that:
(1) The Report fully complies with the requirements of Section
13 or 15(d) of the Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents,
in all material respects, the financial condition and
results of operations of the Partnership.

By: /s/ Raymond E. Koch

Name: Raymond E. Koch
Title: Chief Financial Officer

Date: August 13, 2002