Gold futures rose above $920 an ounce Tuesday as the U.S. dollar weakened after data showed a widening trade deficit in the U.S., boosting gold's investment appeal. Gold for June delivery rose $8.40, or 0.9%, to $921.90 an ounce in early North American electronic trading. The U.S. trade deficit - the difference between exports and imports - increased by 5.5% to $27.6 billion in March from $26.1 billion in February, the Commerce Department reported Tuesday.