Former Federal Reserve Chairman Alan Greenspan told Congress on Thursday he is "shocked" at the breakdown in U.S. credit markets and said he was "partially" wrong to resist regulation of some securities.

Despite concerns he had in 2005 that risks were being underestimated by investors, "this crisis, however, has turned out to be much broader than anything I could have imagined," Greenspan said in remarks prepared for delivery to the House of Representatives Committee on Oversight and Government Reform.
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