SEOUL, South Korea (AP) — Global Stock markets drifted lower Thursday as the U.S. mulled whether to impose new tariffs on autos and auto parts. Europe said it was preparing to retaliate in kind, denting one of the key drivers of global growth. KEEPING SCORE: Germany's DAX fell 0.4 percent to 12,713 and France's CAC 40 was down 0.5 percent at 5,420. Britai...