United States Stock Market Index (US400) traded at 3297 this Friday September 5th, increasing 16 or 0.50 percent since the previous trading session. Looking back, over the last four weeks, US400 gained 5.27 percent. Over the last 12 months, its price rose by 12.16 percent. Looking ahead, we forecast United States Stock Market Index (US400) to be priced at 3269 by the end of this quarter and at 3189 in one year, according to Trading Economics global macro models projections and analysts expectations.