U.S. stock indexes turned south Wednesday morning, mirroring drops in Asia and Europe. The Dow Jones industrial average could be poised to close down a six-week rally that has positioned stocks at levels unseen for more than four years. After gaining 25 points Monday, the DJIA shed 3 points Monday and 68 points Tuesday. In midmorning trading Wednesday, the index shed 43.38 points or 0.33 percent to 13,160.20. The tech-heavy Nasdaq Composite index shed 5.97 points or 0.19 percent to 3,061.29. The Standard and Poor\'s 500 lost 3.73 points or 0.26 percent to 1,409.44. The benchmark 10-year treasury rose 13/32, yielding 1.759 percent. The euro fell to $1.2463 from Monday\'s $1.2473. Against the yen, the dollar fell to 79.180 yen from 79.43 yen. In Tokyo, the Nikkei 255 index fell to 9,131.74, dropping 25.18 points, or 0.27 percent.