Regulator sees increased risk to Fannie, Freddie

Companies backed or bought 3 in 4 home loans in Q4 '07

Fannie Mae and Freddie Mac largely rose to the challenges posed by the credit crunch, purchasing or guaranteeing three out of four mortgages in the fourth quarter of 2007, compared with about one in three loans the year before, federal regulators said in their annual report to Congress.