Washington Mutual (WM)which has offered itself up for sale, failed to attract bids as of yet, the U.K.'s Financial Times reported in its online edition. The newspaper said investors are reluctant to take on WaMu's portfolio of risky mortgage debt. Shares of WaMu, which had recovered some 48% during Thursday's trading session to close at $2.99, slumped around 12% in after-hours action.