The blue chip Dow stock index rebounded Thursday morning, although troubles were not over for U.S. jet maker Boeing. Boeing shares lost 3.3 percent Wednesday and shed 1 percent Thursday morning with investors rattled by continued problems with the 787 Dreamliner. The Labor Department provided encouraging news. First-time unemployment benefit claims for the week ending Saturday fell by 37,000 to 335,000, the lowest figure since November 2007. In midmorning trading, the Dow Jones industrial average added 61.39 points, or 0.45 percent, to 13,572.62. The Nasdaq composite index added 16.12 points, or 0.52 percent, to 3,133.66. The Standard and Poor\'s 500 gained 6.49 points, or 0.44 percent, to 1,479.12. The 10-year treasury note fell 13/32 to yield 1.871 percent. Against the dollar, the euro rose to $1.3348 from Wednesday\'s $1.3289. The dollar gained against the yen, hitting 89.30 yen from 88.38 yen. In Tokyo, the Nikkei 225 index gained 0.09 percent, 9.20 points, to 10,609.64.