Company News: HGIC, DVA, FDO, AMD, RAD, NTES, PWRD, BX

• Share prices of commercial insurer Harleysville Group Inc. (NASDAQ:HGIC) rocketed up 87.06% to $58.96 after Nationwide Mutual Insurance Co. announced its decision to buy Harleysville for $1.63 billion • Analysts at Citi (NYSE:C) downgraded shares of dialysis-center operator DaVita Inc. (NYSE:DVA) from “Buy” rating to “Hold” rating • Shares of Family Dollar Stores Inc. [...]