Summary: Stocks fell deep into the red as a selloff in gold prices pulled the materials sector into a spiral. Gold prices fell to their lowest level since the late-June Brexit vote as the U.S. dollar marched to a two-month high. A selloff in gold prices hit the materials sector hard. Gold companies Barrick Gold , Newmont Mining , Goldcorp , Randgold Resources , and Kingross Gold were all sharply lower. Sears
