[U.S. Stock Market's Three Major Indexes Open Mixed] According to Golden Finance, on September 18, the three major U.S. stock indexes opened mixed. The Dow Jones Index fell 0.14%, the S&P 500 Index rose 0.12%, and the Nasdaq Composite Index rose 0.42%. Google opened up 2.8%. Netflix dropped more than 6%, as Wells Fargo downgraded its rating from 'neutral' to 'underweight,' lowering the target price from $80 to $57.