NEW YORK ( TheStreet) -- CHANGE IN RATINGSCleco ( CNL) upgraded at Goldman from Sell to Neutral. Company has better earnings power, given a favorable rate case. Costco ( COST) upgraded at Stifel from Hold to Buy. $68 price target. Square footage growth is re-accelerating. Dow Chemical ( DOW) rated new Hold at Dahlman Rose. Company faces significant challenges with the ROH acquisition. Entergy ( ETR) downgraded at Goldman from Buy to Neutral. Company had unfavorable rate cases in Arkansas and Texas. Homex ( HXM) upgraded at Credit Suisse to Neutral from Underperform as working capital is stabilizing. Price target jumped to $32 from $26. Knight Transportation ( KNX) downgraded at Deutsche from Buy to Hold. Valuation call. Mosaic ( MOS) downgraded at Stifel from Buy to Hold. Company still faces risks with its court case in Florida. Nextera Energy ( NEE) downgraded at Citigroup from Buy to Hold. $54 price target. Stock has outperformed its peers since March. Nstar ( NST) downgraded at Goldman from Neutral to Sell. Valuation call. PG&E ( PCG) upgraded at Goldman from Neutral to Buy. Valuation call, as the company's rate case should be resolve in the next 6-9 months. Principal Financial ( PFG) rated new Hold at Deutsche Bank. $26 price target. Stock will remain volatile, along with the performance of the overall market. Werner Enterprises ( WERN) downgraded at Deutsche from Buy to Hold. Stock is already pricing in a recovery in truckload rates. Wal-Mart ( WMT) downgraded at Stifel from Buy to Hold. Company will struggle through recent managerial changes. Oasis Petroleum ( OAS) rated new Buy at UBS. $20 price target. Company is a pure play on Bakken, and is oil-heavy.