(Updates to midmorning)
By Bill Rigby
NEW YORK, April 26 (Reuters) - U.S. technology stocks fell slightly on Monday after three days of gains as investors took the opportunity to sell shares after a run of strong earnings.
Blue-chips were near unchanged before major results later this week but were buoyed by Boeing Co. as the aerospace company received an order for 50 7E7 Dreamliners, its new flagship passenger jet.
Meanwhile, skirmishes between U.S. troops and insurgents around Falluja in Iraq unsettled a market still wary of security issues.
"It's a market that has had a nice run, especially in tech stocks," said John Caldwell, chief investment strategist at McDonald Financial Group. "A bit of a pause is OK at this point, with people marking time until earnings and waiting for the economic calendar to heat up."
Electronic Data Systems Corp. , reports after the bell on Monday, followed by Dow components DuPont Co. , McDonald's Corp. and Verizon Communications on Tuesday. First-quarter gross domestic product, or GDP, data is scheduled for Thursday morning.
By midmorning, the technology-focused Nasdaq Composite Index was down 8.30 points, or 0.40 percent, at 2,041.47. The Dow Jones industrial average was down 15.33 points, or 0.15 percent, at 10,457.51. The Standard & Poor's 500 Index was down 2.35 points, or 0.21 percent, at 1,138.25.
Boeing shares were up 97 cents, or 2.3 percent, at $43.44 after Japan's All Nippon Airways ordered 50 7E7 Dreamliners from the aerospace giant, marking the single largest launch order in its history.
Genentech Inc. jumped as a late-stage clinical trial showed Tarceva, a joint drug project with Swiss health-care group Roche Holding AG , helped patients with advanced lung cancer live longer than those getting a placebo. Genentech shares rose $13.19, or 11 percent, to $131.38.
TXU Corp. rose sharply after it sold more than $4.2 billion in assets in Texas and Australia and bought back preferred shares in deals to cut debt. Its shares jumped $4.07, or 13.7 percent, to $33.70.