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

Ariad Pharmaceuticals Inc. (NASDAQ: ARIA) Maintained Hold at Argus.

CenterPoint Energy Inc. (NYSE: CNP) Cut to Neutral at Credit Suisse.

Chimera Investment Corporation (NYSE: CIM) Cut to Underperform at BofA/ML; Cut to Neutral at Credit Suisse.

Facebook, Inc. (NASDAQ: FB) Started as Hold with $38 target at Argus.

Heico Corporation (NYSE: HEI) Cut to Neutral at Credit Suisse.

Invesco Ltd. (NYSE: IVZ) Started as Buy with $28 target at Argus.

Loews Corporation (NYSE: L) named Bull of the Day at Zacks.

Onyx Pharmaceuticals (NASDAQ: ONXX) Raised to Outperform at R.W. Baird; Started as Buy at Deutsche Bank.

Oil States International, Inc. (NYSE: OIS) named Value Stock of the Day at Zacks.

Quest Diagnostics Inc. (NYSE: DGX) Started as Hold at Canaccord Genuity.

Shaw Communications (NYSE: SJR) named Bear of the Day at Zacks.

Smart Balance, Inc. (NASDAQ: SMBL) Reiterated Buy and raised target to $10 at Canaccord Genuity.

TJX Companies Inc. (NYSE: TJX) Raised to Outperform at Wells Fargo.

Under Armour (NYSE: UA) Cut to Neutral at UBS.

Whole Foods Market (NASDAQ: WFM) Started as Buy at SunTrust.

Woodward Inc. (NASDAQ: WWD) Started as Outperform with $48 target at Credit Suisse.

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