The Federal Home Loan Bank Office of Finance announced this week that preliminary combined net income for the FHLBanks jumped 42.3 percent to $733 million in the first quarter of 2012, up from $515 million from the end of the fourth quarter and a whopping 104.7 percent increase from the same period last year. The FHLBank system’s $375 million year-over-year income increase was driven by lower other-than-temporary impairment charges, higher net gains on derivatives, hedged items and financial instruments carried at fair value, and lower assessments, partially offset by lower net interest income, said the Office of Finance.