(Kitco News) - Gold prices are trading with modest gains early Thursday, on some fresh safe-haven investor demand following downbeat economic data coming out of Europe and Asia. The gold market bulls are impressed their yellow metal is holding gains at the same time the U.S. dollar index trades sharply higher. Some technically based short covering is also featured in early trading Thursday. April gold last traded up $2.90 at $1,648.00 an ounce. Spot gold was last quoted up $5.00 at $1,648.00. March Comex silver last traded up $0.091 at $30.96 an ounce.