Today's noteworthy downgrades include: Antero Midstream (AM) downgraded to Neutral from Outperform at Credit Suisse... Atlas Resource Partners (ARP) downgraded to Hold from Buy at Stifel... Broadcom (BRCM) downgraded to Neutral from Buy at Ladenburg... Buenaventura (BVN) downgraded to Neutral from Buy at BofA/Merrill... Choice Hotels (CHH) downgraded to Underperform from Neutral at Credit Suisse... Computer Programs (CPSI) downgraded to Hold from Buy at Topeka... Dril-Quip (DRQ) downgraded to Neutral from Buy at BofA/Merrill... FireEye (FEYE) downgraded to Sell from Hold at Gabelli... Fluor (FLR) downgraded to Neutral from Buy at UBS... Host Hotels (HST) downgraded to Neutral at Credit Suisse... Kilroy Realty (KRC) downgraded to Underperform from Neutral at Credit Suisse... LINN Energy (LINE) downgraded to Underperform from Neutral at Credit Suisse... LinkedIn (LNKD) downgraded to Market Perform from Outperform at Avondale... LinnCo (LNCO) downgraded to Underperform from Neutral at Credit Suisse... MedAssets (MDAS) downgraded to Sector Weight from Overweight at KeyBanc... Mondelez (MDLZ) downgraded to Neutral from Buy at Goldman... Murphy Oil (MUR) downgraded on cash flow outlook at Oppenheimer... National Oilwell (NOV) downgraded to Neutral from Buy at BofA/Merrill... Norfolk Southern (NSC) downgraded to Hold from Buy at Argus... Ocwen (OCN) downgraded on valuation at Sterne Agee CRT... QLogic (QLGC) downgraded to Neutral from Buy at DA Davidson... Range Resources (RRC) downgraded to Neutral from Buy at Guggenheim... SCOR (SCRYY) downgraded to Neutral from Buy at Goldman... SciQuest (SQI) downgraded to Hold at Canaccord... Stratasys (SSYS) downgraded to Underperform from Neutral at BofA/Merrill... Talmer Bancorp (TLMR) downgraded to Market Perform from Outperform at Keefe Bruyette... Time Warner Cable (TWC) downgraded to Neutral from Buy at Buckingham... Ultra Petroleum (UPL) downgraded on natural gas outlook at Sterne Agee CRT... Urban Outfitters (URBN) downgraded to Market Perform from Outperform at BMO Capital... WWE (WWE) downgraded to Neutral from Long-Term Buy at Hilliard Lyons... Whiting Petroleum (WLL) downgraded to Neutral from Buy at Guggenheim... World Fuel Services (INT) downgraded to Equal Weight from Overweight at Stephens... Zillow Group (Z) downgraded to Underperform from Market Perform at Cowen.

UBS analyst Thomas Wadewitz lowered the firm's price target on Norfolk Southern to $294 from $302 and keeps a Buy rating on the shares. Norfolk Southern's Q1 was in like with the pre-report, reflecting weak revenue and margin pressure, the analyst tells investors in a research note.

Jefferies raised the firm's price target on Zillow to $77 from $75 and keeps a Buy rating on the shares. The firm expects upside in Q1, though higher mortgage rates and softer housing data exiting the quarter could encourage Zillow to guide Q2 conservatively. Still, the firm sees tailwinds from new products driving upside to consensus in the coming years, the analyst added in a preview note for the U.S. Internet group.

Reports Q1 revenue $645.37M, consensus $659.31M. Production averaged 2.14 Bcfe per day, approximately 68% natural gas.