Top Analyst Upgrades & Downgrades (ARMH, ADCT, BIDU, BHP, C, PRGO, PLD, RIMM, SSYS, TIN, YHOO)

These are some of this Monday’s top analyst research summaries of upgrades and downgrades from Wall Street firms:

ARM Holdings plc (NASDAQ: ARMH) Cut to Sell at Benchmark.
ADC Telecommunications (NASDAQ: ADCT) Cut to Hold at Auriga.
Baidu, Inc. (NASDAQ: BIDU) Maintained Hold but raised targets by Auriga.
BHP Billiton plc (NYSE: BHP) Cut to Neutral at Credit Suisse; Raised to Overweight at HSBC.
Citigroup Inc. (NYSE: C) Maintained Market Perform at KBW; Maintained Outperform at Oppenheimer.
Perrigo Company (NASDAQ: PRGO) Cut to Sell at Goldman Sachs.
ProLogis (NYSE: PLD) Raised to Outperform at Wells Fargo.
Research In Motion Ltd. (NASDAQ: RIMM) Started as Buy at Dundee
Stratasys (MASDAQ: SSYS) Raised to Buy at Needham.
Temple-Inland (NYSE: TIN) Cut to Neutral at Goldman Sachs.
Yahoo! Inc. (NASDAQ: YHOO) Raised to Buy at ThinkEquity.