
Achillion Pharmaceuticals Inc. (NASDAQ: ACHN) was downgraded to Neutral from Outperform at Credit Suisse.
Allegheny Technologies Inc. (NYSE: ATI) was started as Underperform with a $27 price target (versus a $32.03 close) at Sterne Agee.
AK Steel Holding Corp. (NYSE: AKS) was started as Underperform with a $3 price target (versus a $4.36 close) at Credit Suisse.
Cisco Systems Inc. (NASDAQ: CSCO) was downgraded to Neutral from Buy at MKM Partners.
CoreSite Realty Corp. (NYSE: COR) was downgraded to Neutral from Buy at Bank of America Merrill Lynch.
Exelon Corp. (NYSE: EXC) was downgraded to Underweight from Overweight with a $21 price target (versus a $29.52 close) at Morgan Keegan.
Invesco Ltd. (NYSE: IVZ) was downgraded to Neutral from Buy at Sterne Agee.
Schlumberger Ltd. (NYSE: SLB) was downgraded to Neutral at HSBC.
SPX Corp. (NYSE: SPW) was reinstated as Underperform with an $85 price target (versus a $84.29 close) at Bank of America Merrill Lynch.
Superior Energy Services Inc. (NYSE: SPN) was downgraded to Hold from Buy at Jefferies.