Analysts' Actions: CSCO, MMM, CIT, AMGN, S

NEW YORK (TheStreet) -- CHANGE IN RATINGS

Amgen (AMGN) downgraded at Oppenheimer to Perform from Outperform, Oppenheimer said. Few upside drivers remaining in 2012.

Arris (ARRS) upgraded at Collins Stewart from Neutral to Buy, Collins Stewart said. $15 price target. Moxi should still achieve full-year sales targets.

Arris Group downgraded to hold at TheStreet Ratings.

Atmel (ATML) downgraded to hold at TheStreet Ratings.

Big Lots (BIG) rated new Neutral at JP Morgan. $48 price target. Company is turning sales around buy management has a choppy track record.

Celanese Corporation (CE) upgraded at Jefferies to Buy from Hold, Jefferies said. $65 price target. Ethanol and AO+ should buoy shares.

CIT Group (CIT) upgraded at Morgan Stanley from Equal-weight to Overweight, Morgan Stanley said. $48 price target. Company is moving back toward an investment-grade credit rating.

Compass Minerals (CMP) downgraded at JP Morgan from Neutral to Underweight, JP Morgan said. $66 price target. Customer inventories are likely high heading into the new year.

Cisco Systems (CSCO) downgraded at ISI from Buy to Neutral, ISI Group said. Valuation call, based on a $22 price target.

DuPont Fabros (DFT) downgraded at Jefferies to Hold from Buy, Jefferies said. $24 price target. Too much uncertainty around lease up.

Dollar Tree (DLTR) rated new Overweight at JP Morgan. $100 price target. Company can generate sustainable 20% annual earnings growth.

Ingram Micro (IM) downgraded at Needham from Buy to Hold, Needham said. Valuation call, based on a $20 price target.

iRobot (IRBT) downgraded at JP Morgan to Underweight, JP Morgan said. $30 price target. Company slashed its guidance.

Joy Global (JOY) downgraded at Jefferies to Hold from Buy, Jefferies said. $90 price target. Shares have met price target.

3M (MMM) downgraded at Deutsche from Buy to Hold, Deutsche Bank said. Valuation call, based on a $95 price target.

Solutia (SOA) downgraded at Jefferies to Hold from Buy, Jefferies said. $28.50 price target. Reflecting the prospect of Eastman's acquisition of Solutia for $22 in cash and 0.12 shares.

Thoratec (THOR) upgraded at Piper to Overweight, Piper Jaffray said. $37 price target. Stock is already factoring in higher potential competition.

TripAdvisor (TRIP) downgraded at Benchmark from Buy to Hold, Benchmark said. $31 price target. Growth and margin expansion may still be a year away.

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