 "Wall St rises at open after M&A news")
US stocks opened higher on Wednesday despite weak industrial orders data, after a merger agreement between Kraft Foods and Heinz Co.
The Dow Jones industrial average rose 20.72 points, or 0.12 percent, to 18,031.86, the S&P 500 gained 3.99 points, or 0.19 percent, to 2,095.49 and the Nasdaq Composite added 11.12 points, or 0.22 percent, to 5,005.85.