NEW YORK—Gold prices rebounded Tuesday, jumping more than $15 an ounce as a falling dollar and a big drop in consumer confidence enhanced the allure of precious metals as an alternative investment.

Other commodities traded broadly higher, with silver, copper crude oil and agriculture futures rising.

Gold last week fell the most in nearly two years amid a huge commodities sell-off that sent prices for everything from corn to crude oil sharply lower. Investors jumped back into the gold market Tuesday, spurred by new data showing consumer confidence fell to its lowest leve...

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