Placer Sierra Bancshares ( PLSB) rocketed after Wells Fargo ( WFC) agreed to buy the Californian bank in a stock-based merger. The transaction is expected to close by midyear. Placer Sierra shares were rising $3.63, or 15.4%, to $27.16. Wells Fargo shares were losing 9 cents to $35.50. BankAtlantic Bancorp ( BBX) recouped some of Tuesday's losses after a Bear Stearns analyst upped its rating to peer-perform from underperform. The Florida-based bank fell yesterday on word that it will sell its Ryan Beck subsidiary to Stifel Financial ( SF). BankAtlantic shares were up 17 cents, or 1.3%, to $13.15. Legg Mason ( LM) rose after an analyst with Merrill Lynch predicted it would top estimates in the fiscal third quarter and raised the investment bank's rating to neutral from sell. Shares were adding 93 cents, or 0.9%, to $101.16. Integra Bank ( IBNK) slid after it said an unnamed borrower had failed to meet terms on loans worth $18 million, prompting the Indiana-based bank to increase both its charge-offs and its loan provision to $1.5 million in the fourth quarter. Integra said this doesn't affect earnings guidance, but shares were losing $1.04, or 3.9%, to $25.41. Mercantile Bank ( MBWM) fell after it posted fourth-quarter income of $4.6 million, or 57 cents a share, missing estimates by 6 cents, according to Thomson Financial. The Michigan-based bank earned $4.5 million, or 56 cents a share, a year ago. Shares were down $1.03, or 2.9%, to $34.64.