After surging 9.6% the previous day, the KOSPI turned weaker on the 6th as concerns grew over a prolonged U.S.-Iran war. The KOSPI fell more than 3% intraday, and Samsung Electronics and SK Hynix also tumbled more than 5%, dragging the index lower. The KOSDAQ, which had triggered a buy sidecar amid an intraday spike, gave back much of its gains. With international oil prices and the dollar strengthening, the won·dollar exchange rate quickly climbed to the 1,480-won threshold. As of 10:29 a.m....