S&P Futures are flat to lower this morning. Rating agency Moody's changed its outlook on the United States to negative, but the AAA rating remains in place for now. Boeing announced a host of new orders from the Dubai Airshow this morning. An inflation reading is due out tomorrow morning (CPI). Later this week, the U.S. & China leaders will be meeting at a summit in San Francisco to strengthen ties. In Europe, markets are trading higher. Oil prices are flat to higher this morning ahead of the release of the OPEC monthly oil report and the release of Stockpiles data.