Colonial BancGroup Inc. has become the largest bank failure this year as the 2009 toll of financial institutions approaches 80. The Federal Deposit Insurance Corporation seized the struggling Alabama-based lender Friday and sold it to BB&T Corp. Late Friday, the FDIC announced four other banks had been closed: Community Bank of Nevada and its Arizona subsidiary, Community Bank of Arizona; Union Bank, Gilbert, Ariz; and Dwelling House Savings and Loan Association, Pittsburgh. The Colonial BancGroup deal will knock roughly $2.8 billion off a pool of money, known as the Deposit Insurance Fund, which the FDIC maintains to guarantee bank customer deposits.

Fannie Mae FNM  0.79, +0.05, +6.76%) posted a loss for the second quarter of $14.8 billion, or $2.67 a share, compared with a loss of $2.3 billion, or $2.54 a share in the same period last year.

Net revenues were $5.6 billion and fair value gains were $823 million, Fannie Mae said in a regulatory filing.

The mortgage entity said the $12.5 billion increase in net loss in the period was driven by a $13.4 billion increase in credit-related expenses, which “more than offset a $1.7 billion increase in net interest income.”

The results were “adversely affected by the ongoing deterioration in the housing and mortgage markets, the economic recession and rising unemployment,” Fannie Mae said.

Fannie Mae said its request submitted Thursday for an additional $10.7 billion in aid follows a $19 billion infusion from Treasury in June, and a $15.2 billion infusion in March.