With GSE market share continuing to fade in 2005, Fannie Mae and Freddie Mac relied heavily on their largest lender customers – Countrywide and Wells Fargo, respectively – according to a new ranking by Inside The GSEs. The two GSEs combined for $864.7 billion of new mortgage securities issuance in 2005, down 2 percent from their combined total the year before. That sank the Fannie/Freddie share of the mortgage originations market down to 28.1… [One data table included]