The Federal Home Loan Banks continue to show an investment preference for Fannie Mae and Freddie Mac mortgage-backed securities during the third quarter of 2011, posting a modest increase from the previous quarter, according to a new analysis by Inside The GSEs based on data from the Federal Housing Finance Agency.Ginnie Mae securities, meanwhile, remained popular within the FHLBank system during the three-month period ending Sept. 30, 2011.GSE MBS accounted for 68.9 percent of combined FHLBank MBS portfolios, up 1.7 percent from the second quarter of 2011. The Finance Agency’s data do not separately break out Fannie and Freddie volume or share.