WASHINGTON (AP) — The Obama administration's embattled mortgage relief plan has provided permanent help to only 4 percent of borrowers who have signed up, weak results that could threaten the housing market's recovery.

Among big lenders, Bank of America Corp. had the worst performance in the Treasury Department report card released Thursday. The nation's largest lender completed just 98 modifications for the 160,000 borrowers who had signed up by the end of November. GMAC Mortgage had the most modifications of any lender, just 7,100.

About 760,000 have signed up for the program since it launched in March. But as of last month, just over 31,000 homeowners had received permanent loan modifications. Nearly the same number have fallen out of the program completely either because they missed payments or were found to be ineligible.