NEW YORK ( TheStreet) -- CHANGE IN RATINGSAerovironment ( AVAV) was downgraded to hold at TheStreet Ratings. Big Lots ( BIG) was upgraded from sell to hold, Deutsche Bank said. $35 price target. Near-term risks are off the table, Deutsche Bank said. Big Lots ( BIG) was upgraded to buy at TheStreet Ratings. Clean Harbors ( CLH) was upgraded from neutral to outperform, Robert Baird said. $61 price target. Valuation call, as the company lacks near-term negative catalysts, Robert Baird said. DigitalGlobe ( DGI) was downgraded to hold, Benchmark said. $27 price target. Estimates also lowered, as the company lacks potential growth catalysts, Benchmark said. Dril-Quip ( DRQ) was upgraded from underperform to buy, Bank of America/Merrill Lynch said. $101 price target. Company has good growth visibility over the next three years, Bank of America/Merrill Lynch said. Davita ( DVA) was downgraded from buy to hold, Deutsche Bank said. Valuation call, based on a $130 price target, Deutsche Bank said. Kirby ( KEX) was initiated with a market perform rating, Wells Fargo said. Valuation call, as the stock is already up 61% since July, Wells Fargo said. Methanex ( MEOH) was downgraded to neutral, said UBS. The call is based on the recent run in the stock and valuation. Price target is now $39, said UBS. PetSmart ( PETM) was downgraded from overweight to neutral, Piper Jaffray said. $68 price target. Earnings growth will likely decelerate, Piper Jaffray said. Solarcity ( SCTY) was downgraded from buy to hold, Needham said. $18 price target. Deployment growth will likely slow down, Needham said. Sandridge Energy ( SD) was downgraded from market perform to underperform, BMO Capital said. $4 price target. Stock will likely grind lower over the next six to 12 months, BMO Capital said. Varian Medical ( VAR) was downgraded from neutral to sell, Goldman Sachs said. $79 price target. Consensus estimates now appear more reasonable, Goldman Sachs said. MEMC Electronic ( WFR) was upgraded to buy, Goldman Sachs said. $6.50 price target. Company is attractive, on a sum-of-the-parts valuation, Goldman Sachs said.