When Fannie Mae and Freddie Mac unveil their fourth-quarter 2013 results in February, the two government-sponsored enterprises are expected to again report strong earnings driven by: higher guaranty fee income, one-time gains tied to legal settlements, and a boost from lower loan-loss reserves. But most of the money will be swept straight into the U.S. Treasury. One of the major factors in the GSEs’ huge 2013 earnings so far – the release of deferred tax assets – will likely be...