NEW YORK ( TheStreet) -- CHANGE IN RATINGSBrightpoint ( CELL) was downgraded to Hold at TheStreet Ratings. Chesapeake Energy ( CHK) was upgraded at BMO Capital from Market Perform to Outperform. Negative sentiment appears to have peaked, BMO said. $25 price target. Compass Minerals ( CMP) was upgraded at Keybanc from Hold to Buy. $95 price target. Earnings should show substantial improvement in 2013, Keybanc said. Calpine Corporation ( CPN) was upgraded at Jefferies to Buy from Hold. $21.50 price target. Valuation and higher estimates, Jefferies said. Emcor ( EME) was upgraded at Stifel Nicolaus from Hold to Buy. $40.50 price target. Company is seeing higher bookings for nonresidential construction, Stifel Nicolaus said. HMS Holdings Corporation ( HMSY) was upgraded at Jefferies to Buy from Hold. $29 price target. Opportunity at sub-1x PEG, Jefferies said. Kaiser Aluminum ( KALU) was upgraded at Dahlman Rose to Buy. $70 price target. Company continues to execute well in a challenging environment, Dahlman Rose said. Kaiser Aluminum was upgraded from Hold to Buy at Keybanc. $63 price target. Company is seeing higher end-market demand, Keybanc said. Kraft ( KFT) was upgraded at JP Morgan from Neutral to Overweight. $45 price target. Nielsen data have been positive, and the company has room to boost its dividend, JP Morgan said. Lentuo International was initiated with a Sell rating at TheStreet Ratings. Nokia ( NOK) was downgraded at RBC Capital to Sector Perform from Outperform. $5 price target. Feature phone market is weak, RBC Capital said. Verifone ( PAY) was downgraded at Deutsche Bank from Hold to Sell. $40 price target. Company's organic growth is likely not sustainable, Deutsche said. Procter & Gamble ( PG) was downgraded at Oppenheimer to Perform from Outperform. Another mixed quarter with disappointing near-term outlook, Oppenheimer said. PPG Industries ( PPG) was upgraded at Credit Suisse from Neutral to Outperform. $122 price target. Nylon-12 issues appear to be more manageable, Credit Suisse said. Sandridge Energy ( SD) was upgraded at JP Morgan from Neutral to Overweight. $13 price target. Company is inexpensive and can deliver above-average growth, JP Morgan said. Supervalu ( SVU) was initiated with a Sell rating at Goldman Sachs. $5 price target. Company faces multiple secular and cyclical growth headwinds, Goldman said. Treehouse ( THS) was downgraded at JP Morgan from Overweight to Neutral. $60 price target. Company lacks near-term catalysts, JP Morgan said.