NEW YORK ( TheStreet) -- CHANGE IN RATINGS Amcol ( ACO) downgraded at Sterne from Buy to Neutral, Sterne Agee said. Valuation call, as the stock is up 20% over the past five months. ALCO Stores ( ALCS) upgraded to hold at TheStreet Ratings. Apogee Enterprises ( APOG) upgraded to buy at TheStreet Ratings. American Water Works ( AWK) upgraded at Goldman to Buy from Neutral, Goldman Sachs said. $42 price target. Structural winner from the need to invest in new water infrastructure. Citigroup ( C) downgraded at UBS to Neutral from Buy, UBS said. $36 price target. Valuation call. Clean Harbors ( CLH) downgraded at Baird from Outperform to Neutral, Robert Baird said. Valuation call, based on a $58 price target. Coach ( COH) downgraded at Credit Suisse from Outperform to Neutral, Credit Suisse said. Valuation call, based on a $63 price target. FMC ( FTI) upgraded at Guggenheim from Neutral to Buy, Guggenheim said. $64 price target. Estimates also boosted, given an improving subsea market. Goldman Sachs ( GS) downgraded at UBS to Neutral from Buy, UBS said. $125 price target. Valuation call. Iconix ( ICON) downgraded at Benchmark from Buy to Hold, Benchmark said. Valuation call, as lower income consumers may have less available discretionary income. Key Energy ( KEG) rated new Hold at Wunderlich. $10 price target. Company faces increased competition in the U.S. Limited Brands ( LTD) upgraded at Credit Suisse from Neutral to Outperform, Credit Suisse said. $59 price target. Company has strong pricing power and can expand overseas. Marriott ( MAR) downgraded at JP Morgan from Overweight to Neutral, JP Morgan said. Valuation call, based on a $42 price target. Morgan Stanley ( MS) downgraded at UBS to Neutral from Buy, UBS said. $19 price target. Valuation call. Norfolk Southern ( NSC) downgraded at Wells to Market Perform, Wells Fargo said. Estimates also cut, given the company's new guidance. NV Energy ( NVE) downgraded at Goldman to Neutral from Buy, Goldman Sachs said. $19 price target. Outperformance and limited positive catalysts. PulteGroup ( PHM) upgraded at Compass Point from Market Perform to Buy, Compass Point said. Relative valuation call, as the sector should continue to recover. Plexus ( PLXS) rated new Hold at Stifel. Margin expansion has stalled, along with weaker end-market demand.