United States Stock Market Index (US400) traded at 3673 this Friday May 22nd, increasing 31 or 0.84 percent since the previous trading session. Looking back, over the last four weeks, US400 gained 1.10 percent. Over the last 12 months, its price rose by 23.37 percent. Looking ahead, we forecast United States Stock Market Index (US400) to be priced at 3599 by the end of this quarter and at 3384 in one year, according to Trading Economics global macro models projections and analysts expectations.