On Monday, August 6, gold futures turned lower as investors sold the bullions amid profit taking. Gold futures for October settlement tumbled 0.11% to $1605.35 per troy ounce, before hitting a high of $1607.55. September silver erased 0.44% to $27.78 per troy ounce, and, on the contrary, copper for September settlement rose 0.13% to $3.371 per pound.