Thornburg Mortgage to Announce First Quarter Earnings by June 2, 2008

Thornburg Mortgage, Inc. (NYSE: TMA) announced today it intends to file its Form 10-Q and issue an earnings press release with a follow-up conference call to discuss the first quarter results by June 2, 2008. The company did not file its Form 10-Q Quarterly Report for the quarter ended March 31, 2008 by May 19, 2008 pursuant to its Form 12b-25 previously filed with the Securities and Exchange Commission. The company is unable to file its Form 10-Q because it requires additional time to 1) prepare and finalize the valuation analysis for the March 31, 2008 Senior Subordinated Notes capital raise and 2) determine the proper accounting treatment for that transaction. The company also requires additional time to further analyze and determine the proper accounting treatment for the Override Agreement the company entered into with certain reverse repurchase agreement, securities lending and auction swap agreement counterparties on March 17, 2008. As previously reported, the company currently anticipates it will report a substantial net loss for the quarter ended March 31, 2008 compared to net income of $75 million for the quarter ended March 31, 2007. A substantial portion of the loss is unrealized resulting primarily from the declines in the fair value of its mortgage-backed securities portfolio. Thornburg Mortgage is a leading single-family residential mortgage lender focused principally on prime and super-prime borrowers seeking jumbo and super-jumbo adjustable-rate mortgages. This press release contains forward-looking statements, including those related to the timing of our ability to file our Form 10-Q and expectations with respect to a substantial net loss for the first quarter of 2008. These forward-looking statements are based on management’s current expectations and are subject to uncertainty and changes in circumstance due to a number of factors, including but not limited to: the impact of the accounting for the senior notes financing and Override Agreement; potential delays in the completion of the financial reporting work by the company and the completion of the first quarter review by our outside auditors; general economic conditions; ongoing volatility in the mortgage and mortgage-backed securities industry; the company’s ability to meet the ongoing conditions of the override agreement; the company’s ability to obtain shareholder approval of an increase in authorized shares; the company’s ability to complete the tender offer for all of its outstanding preferred stock; market prices for mortgage securities, interest rates, the availability of ARM securities and loans for acquisition and other risk factors discussed in the company's SEC reports, including its most recent annual report on Form 10-K/A, its Proxy Statement for its Annual Meeting to be held on June 12, 2008 and its Registration Statement on Form S-3. These forward-looking statements speak only as of the date on which they are made and except as required by law, the company does not intend to update such statements to reflect events or circumstances arising after such date.