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

AAR Corporation (NYSE: AIR) Maintained Outperform as Bull of the Day at Zacks.
Alcoa Inc. (NYSE: AA) Raised to Buy at Goldman Sachs.
Applied Materials Inc. (NASDAQ: AMAT) Cut to Neutral at JPMorgan.
Buffalo Wild Wings, Inc. (NASDAQ: BWLD) Maintained Strong Buy at Zacks.
Caterpillar Inc. (NYSE: CAT) Reiterated Outperform and target raised to $148 at Credit Suisse.
Corporate Office Properties (NYSE: OFC) Cut to Underweight at JPMorgan.
Dendreon Corporation (NASDAQ: DNDN) Started as Underperform at Credit Suisse.
EMC Corp. (NYSE: EMC) Raised to Buy with $35 target at BofA/ML.
Montpelier Re Holdings (NYSE: MRH) named as Bear of the Day at Zacks.
Netflix, Inc. (NASDAQ: NFLX) Raised to Buy at Citigroup.
Sanmina-SCI Corporation (NASDAQ: SANM) Raised to Buy at Argus.
Seattle Genetics Inc. (NASDAQ: SGEN) Started as Buy
Sprint-NexTel Corporation (NYSE: S) Reiterated Buy with $7 target at Argus.
UnitedHealth Group (NYSE: UNH) Kept at Strong Buy and noted as Value at Zacks.
V.F. Corporation (NYSE: VFC) Cut to Hold at Citigroup.
Whole Foods Market, Inc. (NASDAQ: WFMI) Cut to Hold at Jefferies.
Y M Biosciences Inc. (AMEX: YMI) Started as Neutral with $4 target at BofA/ML.
Zebra Technologies Corp. (NASDAQ: ZBRA) Raised to Overweight at JPMorgan.

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JON C. OGG