NEW YORK ( TheStreet) -- Acme United ( ACU) was downgraded to hold at TheStreet Ratings. Alexion ( ALXN) was initiated with a neutral rating at Credit Suisse. $110 price target. Company lacks near-term catalysts, Credit Suisse said. Biomarin ( BMRN) was initiated with a neutral rating at Credit Suisse. Valuation call, based on a $68 price target, Credit Suisse said. Clearwire ( CLWR) was upgraded at DA Davidson to neutral from underperform. $4.40 price target. Expect Sprint Nextel ( S) to match DirecTV's ( DTV) bid. Cepheid ( CPHD) was downgraded at Jefferies to hold from buy. Valuation call, based on a $38 price target, Jefferies said. Calpine ( CPN) was upgraded at Deutsche Bank to buy from hold. $23 price target. Rising interest rates make company an attractive choice, relative to traditional utilities, Deutsche Bank said.
Exterran ( EXH) was upgraded to buy at TheStreet Ratings. Haemonetics ( HAE) was initiated with a neutral rating at Goldman Sachs. Valuation call, based on a $47 price target, Goldman said. Mellanox ( MLNX) was downgraded at UBS to neutral. TASE delisting and the potential split of the CEO and chairman roles will drive near-term pressure, UBS said. Price target is now $57. Morgan Stanley ( MS) was upgraded at Deutsche Bank to buy from hold. $30 price target. Stock continues to trade at a discount to tangible book value, even though earnings momentum appears poised to accelerate, Deutsche said. Myriad ( MYGN) was downgraded at Jefferies to hold from buy. $31 price target. Stock is up more than 20%, ahead of the pending Supreme Court decision, Jefferies said.
Northwestern ( NWE) was upgraded at Robert Baird to outperform from neutral. $47 price target. Natural gas acquisition should boost earnings growth, Baird said. RF Micro ( RFMD) was upgraded at DA Davidson to buy from neutral. Estimates were also increased as the company can expand its gross margin, DA Davidson said. Scotts Miracle-Gro ( SMG) was downgraded at BMO Capital to underperform from market perform. Valuation call, based on a $43 price target, BMO Capital said. Tiffany ( TIF) was initiated with an outperform rating at Credit Suisse. $89 price target. Company can deliver low-teens annual earnings growth over the next five years, Credit Suisse said.