NEW YORK ( TheStreet) -- CHANGE IN RATINGSAtheros Communications ( ATHR) upgraded at FBR from Market Perform to Outperform. $43 price target. Recent checks suggest that business is robust. Endo Pharmaceuticals ( ENDP) downgraded at Goldman from Buy to Neutral. $27 price target. Stock lacks near-term catalysts. F5 Networks ( FFIV) downgraded at Canaccord to Hold. Valuation call, based on an $80 price target. First Horizon ( FHN) downgraded at KBW to Market Perform. $14 price target. Estimates also cut. Juniper Networks ( JNPR) upgraded at Canaccord to Buy. $35 price target. Company is positioned well to grow into 2011. King Pharmaceuticals ( KG) upgraded at Goldman to Neutral from Sell. Valuation call, based on a $9.50 price target. Perrigo ( PRGO) downgraded at Goldman to Sell. $50 price target. Valuation call, as the stock is up 44% year-to-date. Safe Bulkers ( SB) downgraded at BofA/Merrill to Buy from Neutral. The Baltic Dry Index (BDI) hints at a slowdown in China's growth. Price target trimmed to $8 from $9.50. Temple-Inland ( TIN) downgraded at Goldman from Buy to Neutral. Valuation call, as the sector is seeing lower pulp prices. Teekay Taankers ( TNK) upgraded at BofA/Merrill to Buy from Neutral. Investment benefits dividend. Price target jumped to $15 from $12.50. WellCare Health Plans ( WCG) reinstated at BofA/Merrill with a Buy rating and $29 price target. WCG is launching a turnaround strategy as an arduous FBI investigation of accounting errors closes. Yahoo! ( YHOO) upgraded at ThinkEquity from Hold to Buy. Company should see continued improvement in display growth and stabilizing search market share.