Updated from 8:50 am EDT to include more ratings and estimate changes.

Change in Ratings

Alcoa(AA) - Get Report downgraded at Nomura to Neutral. Oversupply in China should drive aluminum prices lower.

Buffalo Wild Wings (BWLD) upgraded at Keybanc to Overweight. $175 price target. Company offers growth at an attractive price.

KeyCorp(KEY) - Get Report downgraded at Deutsche from Buy to Hold. $14 price target. Valuation call, based on a $14 price target.

Metaldyne Performance (MPG) downgraded at Nomura from Buy to Neutral. Valuation call, based on a $24 price target.

MRC(MRC) - Get Report downgraded at Keybanc to Sector Weight. Valuation call, after the stock gained 14% last Friday.

News Corp.(NWSA) - Get Report downgraded at Wells Fargo to Market Perform. Company is seeing lower sales.

Papa John's (PAPA) upgraded at Keybanc to Overweight. $70 price target. Valuation call, as the stock is down 20% since late October.

Qualcomm(QCOM) - Get Report downgraded at Nomura from Buy to Neutral. $60 price target. Uncertainty in China will likely persist.

Bankrate (RATE) upgraded at BofA/Merrill from Underperform to Buy. $18 price target. Company sold its insurance business and can expand margins.

Regions Financial(RF) - Get Report downgraded at Deutsche from Buy to Hold. $11 price target. Valuation call, as the company is already pricing in a near-term interest rate increase.

RSP Permian (RSPP) upgraded at Canaccord from Hold to Buy. $33 price target. Company has a solid growth outlook and operational catalysts.

Sonic Automotive(SAH) - Get Report upgraded at Goldman from Sell to Neutral. $27 price traget. See modest upside to consensus earnings expectations.

Stifel Financial(SF) - Get Report upgraded Nomura to Buy. $54 price target. Valuation call, as the company appears to have reached an inflection point.

Stratasys(SSYS) - Get Report downgraded at Deutsche Bank from Buy to Hold. $28 price target. Company has limited growth visibility.

US Steel(X) - Get Report downgraded at Morgan Stanley to Equal-weight, Morgan Stanley said. $19 price target. Risk-reward is deteriorating.

Stock Comments / EPS Changes

Costco(COST) - Get Report estimates, target raised at Jefferies. Shares of COST now seen reaching $144, according to Jefferies. Estimates also increased, as international expansion should drive growth. Hold rating.

Ruckus Wireless (RKUS) added to Conviction Buy List at Goldman. $16 price target. Pullback has created a buying opportunity.

This article was written by a staff member of TheStreet.