As of March 1, 2009 Fannie Mae increased the number of mortgages allowed per investor to ten. This is up from the previous limit of four. This new guideline applies to one to four unit properties. Fannie Mae cites the importance of investors in the following quote.
Experienced investors play a key role in the housing recovery and Fannie Mae’s continued support for investor borrowers is consistent with its mission to provide stability, liquidity, and affordability to the nation’s housing system.