Iconix Brand Group ( ICON) was downgraded at Citigroup to neutral from buy. $25 price target. Buffalo acquisition nice, but pricey, Citigroup said. Invesco ( BBT) was downgraded at BMO Capital from outperform to market perform. Valuation call, based on a $29 price target, BMO said. Kohl's ( KSS) was downgraded at Citigroup to neutral from buy. $50 price target. Difficult turnaround attempt, Citi said. Life Technologies ( LIFE) was downgraded at Leerink Swann from outperform to market perform. Taking a cautious view on the next-generation sequencing business, and the stock has made a big run, Leerink Swann said. Legg Mason ( LM) was downgraded at BMO Capital from market perform to underperform. $26 price target. Company is not positioned well to participate in a reflection toward equities, BMO Capital said. Macy's ( BBT) was upgraded at Citigroup to buy from neutral. $46 price target. Benficiary of a stronger housing market, Citigroup said. National Oilwell ( NOV) was downgraded at Bernstein Research from outperform to market perform. $80 price target. Backlog will likely soon peak, Bernstein Research said. National Oilwell Varco was downgraded at Bernstein to market perform from outperform. $80 price target. Expectations that backlogs will soon peak, Bernstein said. New York Community Bancorp ( NYCB) was upgraded at Morgan Stanley to overweight. $15 price target. Company restructured its debt, and net interest margin is holding up better than expected, Morgan Stanley said. PulteGroup ( PHM) was downgraded at Barclays from overweight to equal-weight. $21 price target. New-home prices will likely flatten out, Barclays said. Realogy ( RLGY) was downgraded at Barclays from overweight to equal-weight. Valuation call, based on a $46 price target, Barclays said. Sandridge ( SD) was downgraded at J.P. Morgan from overweight to underweight. $5 price target. Company faces a potential financial crunch, J.P. Morgan said. State Street ( STT) was downgraded at Guggenheim from buy to neutral. $63 price target. Valuation call, as the stock is up 32% since the fall, Guggenheim said. Constellation Brands ( STZ) was downgraded at Stifel Nicolaus from buy to hold. DOJ suit adds risk to the story. Stillwater Mining ( SWC) was upgraded at J.P. Morgan from neutral to overweight. $19 price target. Company is leveraged to rising palladium prices, J.P. Morgan said. Stryker ( SYK) was downgraded at UBS to neutral from buy. Reasonably valued and strong recent move, UBS said. Target ( TGT) was upgraded at Citigroup to buy from neutral. $72 price target. Well-positioned to gain market share through the new Threshold line, Citi said. Toll Brothers ( TOL) was downgraded at Barclays to underweight from equal-weight. $36 price target. Expect a shift toward more entry-level home buyers, Barclays said.