Now the S&P 500 is struggling to hold on, too. The market benchmark erased earlier gains but was back up 0.1%. The Nasdaq Composite was down 0.3%. The Dow was up just 41 points, or 0.1%. The S&P’s ...

The S&P 500 rose 0.2%, the Nasdaq Composite edged lower by 0.1% ... The Philadelphia Semiconductor Index advanced 1.4%. The Russell 2000 index, a key gauge for small-cap stocks, outperformed with a ...