U.S. gold futures surged to a record on Friday after a report that Washington has imposed tariffs on imports of 1-kg bullion bars, widening the spread between New York futures and spot prices.

December U.S. gold futures were up 0.7% to $3,476.70, after hitting a record $3,534.10. Spot gold was down 0.3% at $3,386.63 per ounce. Bullion is on track for a second straight weekly gain, up 0.7% so far this week.

The futures-spot spread widened to more than $100 after the Financial Times reported that the United States had imposed tariffs on imports of 1-kg gold bars, citing a July 31 Customs and Border Protection letter.

The letter said 1-kg and 100-ounce gold bars should be classified under a customs code subject to higher duties.

"Given the volatility of U.S. trade-related decision-mak

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