The Federal Home Loan Banks are relying more and more on mortgage investments to boost their sagging revenue, new numbers show, as home loans retained in portfolio proved to be the only major income source to hold its own against last year’s tally. According to the FHLBanks’ Office of Finance, the 12 GSEs pulled in $382 million in net income during the first quarter of 2004 – a 16.2 percent drop from what they