Oil prices fell two per cent on Thursday, largely unwinding an earlier rally, as massive weekly gasoline and distillate stock builds overshadowed a larger-than-expected crude stock draw. Brent crude fell by $1.57, or 2pc, to $79.01 a barrel by 11:23am EDT, after earlier rising over $1. US West Texas Intermediate crude futures fell $1.47, or 2pc, to $73.57. Low fuel demand and large inventory