Ammon News - Gold prices edged higher on Thursday, helped by a slight retreat in the dollar and bond yields, while investors kept a close tab on trade negotiations as U.S. President Donald Trump broadened his tariff war.

Spot gold rose 0.3% to $3,321.68 per ounce by 0608 GMT. U.S. gold futures were up 0.3% at $3,329.90.

"Gold bounced off a technical support level and also, the broader dollar declined," said Nicholas Frappell, global head of institutional markets at ABC Refinery.

Trump escalated his tariff campaign on Wednesday, announcing a 50% tariff on U.S. copper imports and a 50% duty on goods from Brazil, both effective on August 1.

Spot silver edged up 0.2% to $36.42 per ounce, platinum fell 0.2% to $1,345.06, and palladium gained 0.3% to $1,108.18. Reuters