Steel Dynamics ( STLD) estimates cut at UBS through 2011. Company is seeing a more muted recovery. Buy rating and $23 price target. Seagate Technology ( STX) estimates upped at UBS through 2011. Company will likely resume its share buyback. Buy rating and $31 price target. Total System Services ( TSS) numbers boosted at Goldman. Shares of TSS now seen reaching $14. Estimates also increased, as the company is benefitting from a better macro environment. Sell rating. Tupperware ( TUP) estimates, target raised at Goldman. Shares of TUP now seen reaching $60. Estimates also increased, given strong sales momentum. Neutral rating. Weatherford ( WFT) estimates lowered at Goldman through 2012. Weaker international results are offsetting growth in North America. Neutral rating and $19 price target. >> Who Owns Weatherford?: George SorosXilinx ( XLNX) estimates increased at UBS through 2011. Company should see better demand in the industrial and communications markets. Buy rating and $32 price target. Yahoo! ( YHOO) estimates, target increased at Goldman. YHOO estimates were boosted through 2012. Company is seeing a lower tax rate and expected to buy back more stock. Neutral rating and new $20 price target.