Exhibit 99.1

Investors and Media

Christopher Oltmann

(818) 224-7028

PennyMac Mortgage Investment Trust Announces

Increase in Its Share Repurchase Program

Moorpark, CA, February 24, 2016 – PennyMac Mortgage Investment Trust (NYSE: PMT) today announced that its Board of Trustees has authorized an increase in its previously announced share repurchase program to $200 million. Under the program, the Company may repurchase its outstanding common shares of beneficial interest. To date this year, the Company has repurchased 2.7 million common shares at a cost of $30.9 million. Including amounts repurchased last year, the Company has repurchased a total of 3.7 million common shares under the program at a cost of $46.9 million.

Share repurchases may be executed through various means, including, without limitation, open market transactions, block trades, tender offers and/or through other legally permissible means, depending on market conditions and in accordance with applicable rules and regulations. The timing, manner, price and amount of any repurchases will be determined by the Company in its discretion and will be subject to economic and market conditions, the Company’s share price, applicable legal requirements and other factors. The share repurchase program does not have an expiration date and the authorization does not obligate the Company to acquire any particular amount of common shares. The share repurchase program may be suspended or discontinued at the Company’s discretion without prior notice.

“At the current price of our common shares, the repurchase of our stock is a highly attractive use of capital,” said Stanford L. Kurland, PMT's Chairman and Chief Executive Officer. “We continue to pursue opportunities to sell lower yielding investments and generate proceeds which we can use for additional share repurchases.”

About PennyMac Mortgage Investment Trust

PennyMac Mortgage Investment Trust is a mortgage real estate investment trust (REIT) that invests primarily in residential mortgage loans and mortgage-related assets. PennyMac Mortgage Investment Trust trades on the New York Stock Exchange under the symbol “PMT” and is externally managed by PNMAC Capital Management, LLC, an indirect subsidiary of PennyMac Financial Services, Inc. Additional information about PennyMac Mortgage Investment Trust is available at www.PennyMac-REIT.com.

This press release contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, regarding management’s beliefs, estimates, projections and assumptions with respect to, among other things, the Company’s financial results, future operations, business plans and investment strategies, as well as industry and market conditions, all of which are subject to change. Words like “believe,” “expect,” “anticipate,” “promise,” “plan,” and other expressions or words of similar meanings, as well as future or conditional verbs such as “will,” “would,” “should,” “could,” or “may” are generally intended to identify forward-looking statements. Actual results and operations for any future period may vary materially from those projected herein and from past results discussed herein. Factors which could cause actual results to differ materially from historical results or those anticipated include, but are not limited to: changes in our investment objectives or investment or operational strategies, including any new lines of business or new products and services that may subject us to additional risks; volatility in our industry, the debt or equity markets, the general economy or the real estate finance and real estate markets specifically; events or circumstances which undermine confidence in the financial markets or otherwise have a broad impact on financial markets; changes in general business, economic, market, employment and political conditions, or in consumer confidence and spending habits from those expected; declines in real estate or significant changes in U.S. housing prices or activity in the U.S. housing market; the availability of, and level of competition for, attractive risk-adjusted investment opportunities in mortgage loans and mortgage-related assets that satisfy our investment objectives; the inherent difficulty in winning bids to acquire distressed loans or correspondent loans, and our success in doing so; the concentration of credit risks to which we are exposed; the degree and nature of our competition; the availability, terms and deployment of short-term and long-term capital; the adequacy of our cash reserves and working capital; our ability to maintain the desired relationship between our financing and the interest rates and maturities of our assets; the timing and amount of cash flows, if any, from our investments; unanticipated increases or volatility in financing and other costs, including a rise in interest rates; the performance, financial condition and liquidity of borrowers; incomplete or inaccurate information or documentation provided by customers or counterparties, or adverse changes in the financial condition of our customers and counterparties; changes in the number of investor repurchases or indemnifications and our ability to obtain indemnification or demand repurchase from our correspondent sellers; increased rates of delinquency, default and/or decreased recovery rates on our investments; increased prepayments of the mortgages and other loans underlying our mortgage-backed securities or relating to our mortgage servicing rights, excess servicing spread and other investments; the degree to which our hedging strategies may or may not protect us from interest rate volatility; the effect of the accuracy of or changes in the estimates we make about uncertainties, contingencies and asset and liability valuations when measuring and reporting upon our financial condition and results of operations; changes in regulations or the occurrence of other events that impact the business, operation or prospects of government sponsored enterprises; changes in government support of homeownership; changes in governmental regulations, accounting treatment, tax rates and similar matters; our ability to satisfy complex rules in order to qualify as a REIT for U.S. federal income tax purposes; and our ability to make distributions to our shareholders in the future. You should not place undue reliance on any forward-looking statement and should consider all of the uncertainties and risks described above, as well as those more fully discussed in reports and other documents filed by the Company with the Securities and Exchange Commission from time to time. The Company undertakes no obligation to publicly update or revise any forward-looking statements or any other information contained herein, and the statements made in this press release are current as of the date of this release only.

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