Key Energy ( KEG) upgraded at Wells from Market Perform to Outperform, Wells Fargo said. Company can post solid growth in all three of its markets.

Lions Gate Entertainment ( LGF) upgraded at Evercore from Equal-Weight to Overweight, Evercore said. $10.25 price target. Performance of new titles is vital.

Linear Technology ( LLTC) downgraded at JP Morgan from Neutral to Underweight, JP Morgan said. $30 price target. Lack of leverage due to high inventory and utilization rates.

Live Nation ( LYV) downgraded at Stifel from Buy to Hold, Stifel Nicolaus said. Growth could be more muted in 2012.

Medtronic ( MDT) upgraded at Wells Fargo from Market Perform to Outperform, Wells Fargo said. $44-45 valuation range. Recently launched CRDM products starting to take market share.

Monster Beverage ( MNST) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. $124 price target. Rehab drink should help drive near-term growth.

Philip Morris ( PM) downgraded at Goldman from Buy to Neutral, Goldman Sachs said. $80 price target. Company lacks near-term catalysts.

Panera Bread ( PNRA) upgraded at Morgan Stanley from Equal-weight to Overweight, Morgan Stanley said. $168 price target. Quick service names should outperform in the near term.

Panera Bread upgraded at Morgan Stanley from Equal-weight to Overweight, Morgan Stanley said. $168 price target. Quick service names should outperform in the near term.

Patterson-UTI ( PTEN) downgraded at Wells from Outperform to Market Perform, Wells Fargo said. Company faces multiple growth headwinds.

Rovi ( ROVI) upgraded at Brean Murray from Hold to Buy, Brean Murray said. $41 price target. Becoming more constructive on the company, given management's new guidance.

Charles Schwab ( SCHW) upgraded at Goldman to Buy, Goldman Sachs said. Net interest margin should stabilize and the company generates solid fee income.

Stifel Financial ( SF) upgraded at Goldman to Buy, Goldman Sachs said. Company generates solid fee income.

SXC Health ( SXCI) downgraded at Morgan Stanley from Overweight to Equal-weight, Morgan Stanley said. Valuation call, as the stock is up 50% over the past three months.

Tesla Motors ( TSLA) upgraded at Wunderlich from Hold to Buy, Wunderlich Securities said. $30 price target. Fundamental story appears to remain intact.

Tesla Motors ( TSLA) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. $35 price target. Valuation call, as the stock is down 35% over the past two months.

Texas Roadhouse ( TXRH) downgraded at Morgan Stanley from Overweight to Equal-weight, Morgan Stanley said. Casual dining names could underperform in the near term.

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