NEW YORK (AP) a¿¿ Shares of some top gold companies were mixed at the close of trading: Barrick Gold Corp. unchanged at $16.58. Gold Fields Ltd ADS rose $.07 or 2.3 percent, to $3.09. GoldCorp. rose $.08 or .4 percent, to $20.92. Newmont Mining Corp. fell $.12 or .5 percent, to $22.64.