NStar (NST) (ThOR) (MRGE) (NXTM) Upgraded

NStar (NYSE: NST), Thoratec (NASDAQ: THOR), Merge Healthcare Inc (NASDAQ: MRGE) and Nxstage Medical (NASDAQ: NXTM) upgraded by analysts.

Merge Healthcare Inc. (MRGE) was upgraded by Robert W. Baird from a “Neutral” rating to an “Outperform” rating. They have a price target of $8.00 on the company, up from $6.00.

NStar (NST) was upgraded by ISI Group from a “Sell” rating to a “Hold” rating.

Nxstage Medical (NXTM) was upgraded by Rodman & Renshaw from an “Underperform” rating to a “Market Perform” rating.

Thoratec (THOR) was upgraded by Wedbush from an “Underperform” rating to a “Neutral” rating. They have a price target of $33.00 on the company.