CHANGE IN RATINGS

Amazon.com ( AMZN) upgraded at Citigroup from Buy to Hold. $97 price target. Company's operating margins are coming back faster and sales growth may be sustainable longer than previously expected.

Cheesecake Factory ( CAKE) downgraded at Goldman Sachs to Neutral due to recent 77% price appreciation since March 11. Recommended long CAKE/short PFCB trade resulted in 31% relative performance gain. Expect upward revisions in estimates for CAKE, but note that valuation appears extended. Price target at $13.

Capital One ( COF) downgraded at Goldman Sachs to Neutral from Buy due to likely extended weakness in credit card into 2010. Note rising delinquencies and preference for DFS. Price target lowered to $17 from $18.

City National ( CYN) downgraded at Goldman Sachs to Sell from Neutral due to likely weakness in quarterly pre-provision results caused by asset sensitivity and asset management results. Price target trimmed to $30 from $35.

Discover Financial ( DFS) upgraded at Goldman Sachs to Buy from Neutral, Goldman said. Note attractive valuation, track record of book valuation growth, and TCE/TA ratio of 8.4%. Company will continue to receive Visa/Mastercard settlement payments during a tough 2009. Price target upped to $12 from $6.50.

Energizer Holdings ( ENR) downgraded at UBS. Rating lowered to Sell from Neutral. Price target raised to $53 from $40. 2009 EPS estimates raised to $5.40 from $5.31.

King Pharmaceuticals ( KG) upgraded at UBS from Sell to Buy. $10.50 price target. Expect a higher probability of Skelaxin settlement with SGP.

Quicksilver Resources downgraded to sector perform from outperform and price target reduced to $9 from $10 at RBC. Downgrade based on tight liquidity, near term covenant risk and relative valuation.

Lam Research ( LRCX) downgraded at Barclays. Rating lowered to Equal weight from Overweight. Price target lowered to $28 from $30. 2009 EPS estimates lowered to -$1.02 from -$0.42.

Palm ( PALM) upgraded at Merrill/BofA to Buy. Expect a successful launch of the Pre smartphone with Sprint Nextel.

P.F. Chang's ( PFCB) upgraded at Goldman Sachs to Neutral from Sell. Upgrade is a result of relative underperformance vs. CAKE since March 11. Believe upside to out-year earnings estimates is already priced into shares. Price target raised to $24 from $22.

Weyerhaeuser ( WY) upgraded at Goldman Sachs to Buy from Neutral based on valuation, impending upturn in U.S. housing market and seasonal improvement in demand for wood products. Believe housing market is within 6 to 9 months of showing significant improvement. Price target raised to $43 from $23.

STOCK COMMENTS / EPS CHANGES

Citigroup ( C) estimates lowered at Barclays through 2010. Company facing higher credit costs. Overweight rating and $3 price target.

KLA-Tencor ( KLAC) estimates raised at Barclays through 2010. Expect company to announce strong order trends this week. Equal-weight rating and $25 price target.

This article was written by a staff member of TheStreet.com.

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