From the Fed:
Effective July 9, 2009, the Federal Reserve Bank of New York’s Open Market Trading Desk is making the following change to the System Open Market Account (SOMA) securities lending program:
Commencing with the noon operation on July 9, 2009, direct obligations of housing-related government-sponsored enterprises (GSEs) Fannie Mae, Freddie Mac, and the Federal Home Loan Banks held in the SOMA portfolio will be offered for loan in the daily SOMA securities lending auctions.