Top Analyst Upgrades & Downgrades (CELG, CHK, CIEN, FLEX, GES, LULU, NVDA, RL, RHT, SKS, CRM, STRA, TLAB, ZLC)

These are some of the top analyst upgrades, downgrades, and initiations seen from Wall Street research calls this Thursday morning.

Celgene Corporation (NASDAQ: CELG) Cut to Sector Perform at RBC.
Chesapeake Energy Corporation (NYSE: CHK) Raised to Buy at Canaccord Genuity.
Ciena Corporation (NASDAQ: CIEN) Started as Outperform at Wells Fargo.
Flextronics International Ltd. (NASDAQ: FLEX) Raised to Buy at Collins Stewart.
Guess? Inc. (NYSE: GES) Removed from Focus List at Credit Suisse.
Lululemon Athletica (NASDAQ: LULU) Cut to Underperform at BofA/ML.
NVIDIA Corporation (NASDAQ: NVDA) Raised to Outperform as Bull of the Day at Zacks.
Polo Ralph Lauren Corp. (NYSE: RL) Removed from Focus List at Credit Suisse.
Red Hat, Inc. (NYSE: RHT) Cut to Underweight at JPMorgan.
Saks Incorporated (NYSE: SKS) Raised to Neutral at BofA/ML.
Salesforce.com (NYSE: CRM) Raised to Buy at S&P Equity Research (late-Wednesday call).
Strayer Education Inc. (NASDAQ: STRA) maintained Underperform as Bear of the Day at Zacks.
Tellabs Inc. (NASDAQ: TLAB) Started as Market Perform at Wells Fargo.
Zale Corporation (NYSE: ZLC) Raised to Neutral at BofA/ML.

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JON C. OGG