The broader Standard & Poor 's 500 Index .SPX dropped 9.90 points , or 0.99 percent , to 988.61 .
The broader Standard & Poor 's 500 Index .SPX dropped 9.90 points , or 0.99 percent , to 988.61 .
The technology-laced Nasdaq Composite Index was down 25.36 points , or 1.53 percent , at 1,628.26 .