The U.S. Federal Reserve refused to identify the trading parties who benefitted from the bank's bailout of insurance giant American International Group.

Lawmakers questioning Federal Reserve Vice Chairman Donald Kohn during a hearing on the bailout on Thursday were irritated that the Fed official would not give an answer, according to Reuters.

Revealing the counterparities who benefitted would put AIG's continuing business at risk, he said.

That we find ourselves in this situation at all is ... quite frankly, sickening, said Sen. Christopher Dodd, who chairs the Senate Banking Committee.

The Fed and Treasury can be secretive for a while but not foever, said Sen. Richard Shelby

Aig