Nasdaq Falls 0.5% After Chip Stocks Slip

The stock market’s early gains evaporated. The Nasdaq Composite was down 0.5% after opening higher. The S&P 500 was down 0.2%. The Dow Jones Industrial Average fell 110 points, or 0.2%. The market’s spill followed a sudden drop in chip stocks: The iShares Semiconductor ETF was down 1.