gold rises 2.3% to $4,032.90 as dollar weakens, yields fall after Democratic sweep

gold futures climbed 2.3% to $4,032.90 a troy ounce as the dollar index fell 0.4% and Treasury yields declined after Democrats won both chambers of Congress. silver rose 4%, platinum gained 1.8%. Analysts said a divided government could limit fiscal expansion, supporting safe-haven assets. Iran uncertainty and Friday's payrolls report are next catalysts.