Shares of PFF Bancorp Inc. plunged as much as 22 percent Wednesday after the company said it expects to record a $55 million charge in its fiscal third quarter.

The charge is related to loan and lease losses during the quarter ended Dec. 31.The Rancho Cucamonga-based bank did not specify whether the losses were related to rising mortgage foreclosures, but the news comes a day after another regional bank was hit hard by the subprime collapse.

Shares in FirstFed Financial Corp. dropped more than 8 percent after the regional bank holding company said it was forced to raise its bad-loan provision fivefold in the latest quarter because of a spike in delinquent mortgages.

Shares in PFF sank 18 percent to $8.