Bridgepoint, Cabot, Dycom, National Oilwell: U.S. Equity Movers

replace Massey Energy Co. (MEE US) in the Standard & Poor���s 500 Index, according to a statement. American International Group Inc. (AIG US) fell 4 percent to $28.28, the lowest price since July. Losses at the insurer���s largest unit, the Chartis...