The Department of Housing and Urban Development has made risk management a top priority for FHA, but the agency’s push comes at a time when the program is losing market share. According to HUD data, the FHA’s market share has ebbed from 13.7 percent in 2002 to 9.7 percent last year and just 7.9 percent in the first half of 2004. Over that time span, the number of outstanding FHA-insured loans had dropped by 25…