[The three major U.S. stock indexes give up gains, S&P 500 turns negative] The three major U.S. stock indexes gave up gains, and the S&P 500 index turned from gains to losses.
[The three major U.S. stock indexes give up gains, S&P 500 turns negative] The three major U.S. stock indexes gave up gains, and the S&P 500 index turned from gains to losses.