NEW YORK ( TheStreet) -- CHANGE IN RATINGSAnadarko Petroleum ( APC) rated new Buy at Pritchard Capital. $72 price target. Company has a strong portfolio of domestic onshore assets. CR Bard ( BCR) upgraded at Morgan Joseph from Hold to Buy. $97 price target. Company's buyback program should add to earnings. Berkshire Hathaway ( BRK.B) downgraded at Stifel from Hold to Sell. Earnings could be hurt by macroeconomic issues. Calpine ( CPN) rated new Buy at Deutsche Bank. $16 price target. Company is the strongest operator in its group and is positioned well for a recovery in demand. H&R Block ( HRB) downgraded at Barrington from Outperform to Market Perform. Company has lost several major executives in recent months. Hospira ( HSP) initiated at Citi with a Hold rating and $62 price target. Momentum building. Onyx Pharmaceuticals ( ONXX) upgraded at BMO to Outperform. $32 price target. Stock is cheap, despite low expectations for carfilzomib. Protective Life ( PL) downgraded at BofA/Merrill to Underperform from Neutral on concerns about EPS volatility in 2Q. Variable annuities largely unhedged. Maintain $25 price target. PPL ( PPL) upgraded at UBS from Neutral to Buy. $29 price target. Company has settled its rate case and merger in Kentucky. Stock is also pricing in the recent equity issuance. State Street ( STT) rated new Hold at Stifel Nicolaus. Company will be hurt by lower interest rates, but sales and earnings should gradually recover.