Banks Overwhelmed by Mortgage Refinancing

``The lending logjam extends to the nation's biggest banks, which fired thousands of mortgage workers after interest rates rose in November through February, chilling refinancing demand. Now, the time needed to close a loan has as much as doubled to 60 days, according to Wilson and other bankers, and lenders are holding some mortgage rates higher than they could be to slow the torrent of customers, data show. ''