Updated from 10:31 a.m. ESTThe specter of subprime and other poor credit-related bets have spooked yet another financial institution. Regional lender M&T Bank ( MTB) saw its fourth-quarter crushed 70% resulting from a combination of sour investments in mortgage-tainted collateralized debt obligations, or CDOs, and provisions for future losses and litigation. Shares of the Buffalo, N.Y.-based regional bank, which kicks off an intense run over the coming weeks in which a number of regional and national banks report earnings, had dropped by as much as 3.7% Monday, but more recently were down 1.7% to $72.52 in morning trading. Fourth-quarter net income for M&T fell to $64.9 million, or 60 cents a share, from $213.3 million, or $1.88 per share, during the same period last year. Analysts had forecast fourth-quarter earnings for the bank to come in around $1.63 a share, according to Thomson Financial polls.