Up/Downgrades: PTEN, ZMH, REGN, CTCT, KOG, QGEN, UGI, STX, ZNGA, NIHD

Posted on April 27, 2012 at 08:02 AM EDT

New York, April 27th (TradersHuddle.com) - Research Calls ahead of the market open. Patterson-UTI ( NASDAQ:PTEN ) was downgraded to Underperform from Market Perform at BMO Capital. Zimmer Ho. Read More --

Related Stocks:

Constant Contact, Inc. Kodiak Oil & Gas Corp. NII Holdings, Inc. Patterson-UTI Energy, Inc. Qiagen NV Regeneron Pharmaceuticals, Inc. SEAGATE TECHNOLOGY UGI Corp. ZYNGA-A Zimmer Holdings, Inc.

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