Keycorp ( KEY) downgraded at Bernstein from Market Perform to Underperform, Bernstein Research said. $8 price target. Impact of higher interest rates is premature and exaggerated. Las Vegas Sands ( LVS) downgraded at Craig-Hallum from Buy to Hold, Craig-Hallum said. $54 price target. Valuation call, as Las Vegas remains weak. MB Financial ( MBFI) upgraded at KBW to Outperform, Keefe, Bruyette & Woods said. $26 price target. Loan growth appears to have turned and fee income is accelerating. Murphy Oil ( MUR) downgraded at Societe Generale from Buy to Hold, Societe Generale said. $66 price target. Company restructuring is done and the upstream business is lagging. Regions Financial ( RF) downgraded at Bernstein from Market Perform to Underperform, Bernstein Research said. $7 price target. Sector is not cheap on an earnings basis. Regions Financial downgraded at Baird from Outperform to Neutral, Robert Baird said. $8 price target. Valuation call, as the stock is up 26% since mid-November. Research in Motion ( RIMM) downgraded at Credit Suisse from Neutral to Underperform, Credit Suisse said. $10 price target. Company faces a daunting product transition period. Zions Bancorporation ( ZION) downgraded at Bernstein from Market Perform to Underperform, Bernstein Research said. Valuation call, based on a $20 price target.