Research Analyst's Up/Downgrades ( AMRS, AGNC, VSH, OPEN, ULTI, RYL, CSII, GET, NKA, DTSI )

Published on Wednesday, 08 February 2012 08:47 Written by Christopher Lynn

New York, February 8th (TradersHuddle.com) - Research Calls ahead of the market open.

Amyris (NASDAQ:AMRS) was downgraded to a Neutral from Overweight at Piper Jaffray

American Capital Agency (NASDAQ:AGNC) was downgraded to a Neutral from Buy at Sterne Agee.

Vishay Intertechnology (NYSE:VSH) was upgraded to Overweight from Neutral at JPMorgan.

OpenTable (NASDAQ:OPEN) was upgraded to Overweight from Neutral at Piper Jaffray, following earnings results.

Ultimate Software Group (NASDAQ:ULTI) was downgraded to a Hold from Buy at Needham.

Ryland Group (NYSE:RYL) was downgraded to a Sell from Neutral at Guggenheim.

Cardiovascular Systems (NASDAQ:CSII) was downgraded to Market Perform at William Blair.

Gaylord Entertainment (NYSE:GET) was downgraded to a Neutral from Overweight at JPMorgan.

Niska Gas Storage Partners (NYSE:NKA) was downgraded to Underperform from Market Perform at Wells Fargo.

DTS Inc (NASDAQ:DTSI) was downgraded to Sector Perform from Outperform at Pacific Crest.