Analysts' Actions: Clovis, Lululemon, Microsoft, Twitter, Whole Foods

NEW YORK (TheStreet) -- RATINGS CHANGES

Clovis (CLVS) was upgraded at Stifel Nicolaus to buy from hold. Twelve-month price target is $50. Valuation call, as the stock is down 60% from its highs, Stifel Nicolaus said.

Hi-Crush Partners (HCLP) was initiated at Jefferies with a buy rating. Compelling exposure to rising Northern White frac sand demand. Twelve-month price target is $59. Buy rating.

Life Time Fitness (LTM) was downgraded at Piper Jaffray to neutral from overweight. Twelve-month price target is $54. Studio competition a significant headwind and current valuation accurately reflects long-term opportunity, Piper Jaffray said.

Lululemon (LULU) was upgraded at Sterne Agee to neutral from underperform. Valuation call, following the recent pullback, Sterne Agee said. The company's store expansion plan remains intact, Sterne Agee said.

Microsoft (MSFT) was upgraded at FBR Capital to outperform from market perform. Twelve-month price target is $49. Company can continue to expand its cloud offerings and grow under the new CEO, FBR Capital said.

Bankrate (RATE) was upgraded at RBC Capital to outperform from sector perform. Twelve-month price target is $21. Valuation call, as the stock is down 30% from recent highs, RBC Capital said.

Twitter (TWTR) was initiated with an outperform rating at Pacific Crest. Twelve-month price target is $45. Revenue catalysts are kicking in, Pacific Crest said.

Vector (VGR) was initiated with an overweight rating at Oppenheimer. Twelve-month price target is $25. The firm recently increased its stake in realty company Douglas Elliman, and the stock has 23% potential upside, Oppenheimer said.

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