Regulators on Friday shuttered three small banks in Georgia and one each in Florida, Arkansas and Minnesota, raising to 157 the number of U.S. banks brought down this year by the struggling economy and soured loans.

The Federal Deposit Insurance Corp. took over the three Georgia banks: Appalachian Community Bank of McCaysville, with $68.2 million in assets; Chestatee State Bank, based in Dawsonville, with $244.4 million in assets; and Atlanta-based United Americas Bank, with $242.3 million in assets.

The growing bank failures have sapped billions of dollars out of the deposit insurance fund. It fell into the red last year, and its deficit stood at $8 billion as of Sept. 30.

The number of banks on the FDIC’s confidential "problem" list jumped to 860 in the third quarter from 829 three months earlier. The 860 troubled banks is the highest number since 1993, during the savings-and-loan crisis.

The FDIC expects the cost of resolving failed banks to total around $52 billion from 2010 through 2014.

Depositors’ money – insured up to $250,000 per account – is not at risk, with the FDIC backed by the government. That insurance cap was made permanent in the financial overhaul law enacted in July.