U.S. stock indexes opened mixed Wednesday, as a private payroll firm said 118,000 jobs were added to the economy in November. Ahead of Friday\'s Labor Department report, which includes government jobs, Automatic Data Processing Inc. said the private sector gains were smaller than expected. The ADP monthly report quotes Moody\'s Analytics Chief Economist Mark Zandi as saying Superstorm Sandy \"wreaked havoc on the job market in November, sliding an estimated 86,000 jobs from payrolls.\" In midmorning Wednesday, the Dow Jones industrial average added 30.63 points or 0.24 percent to 12,982.41. The tech-heavy Nasdaq index shed 20.60 points or 0.69 percent to 2,976.09. The Standard and Poor\'s 500 added 1.52 points or 0.11 percent to 1,405.53. The 10-year treasury note rose 4/32 to yield 1.597 percent. The euro fell to $1.3068 from Tuesday\'s $1.3095. The dollar rose to 82.16 yen from 81.90 yen. Japan\'s Nikkei 225 index added 36.38 points, 039 percent, to 9,468.84.