U.S. stock indexes retreated slightly Monday morning following mixed to flat market activity in Asia and Europe. Driving the doldrums, a report from China said imports fell 2.6 percent in August from August 2011. Chinese export growth was a disappointing 2.7 percent over the same period. In midmorning trading on Wall Street, the Dow Jones industrial average lost 14.21 points, or 0.11 percent, to 13,292.43. The tech-heavy Nasdaq Composite index shed 11.34 points, or 0.36 percent, to 3,125.08. The Standard and Poor\'s 500 gave up 1.25 points, or 0.09 percent, to 1,436.67. The benchmark 10-year treasury rose 1/32 to yield 1.668 percent. The euro fell to $1.2786 from Friday\'s $1.2816. Against the yen, the dollar fell to 78.24 yen from 78.26 yen. In Tokyo, the Nikkei 255 index rose 0.03 percent, 2.28 points, to 8,869.10.