Gold edged lower on Friday as shares rebounded, but it was still set for a second straight weekly gain as concerns over the global economy have raised speculation the U.S. Federal Reserve could keep interest rates low for longer. Spot gold was down 0.1 percent at $1,237.40 an ounce by 1145 GMT. “There has been a move down in the dollar and equities this week, but in comparison the upside in gold has been relatively modest,” ABN Amro analyst Georgette Boele said.