U.S. stock market opens, Dow Jones down 0.08%, S&P 500 index up 0.01%, Nasdaq up 0.03%. General Motors (GM.N) down 3.75%, Q2 performance below expectations. Lockheed Martin (LMT.N) down 8.44%, Q2 profit significantly declined due to a $1.6 billion charge. DuPont (DD.N) up 1.29%. Opendoor Technologies up 24%.
