The Standard & Poor 's 500 index advanced 6.48 , or 0.7 per cent , to 990.51 .
The broader Standard & Poor 's 500 Index .SPX rose 6.48 points , or 0.66 percent , to 990.51 .
That task appealed to two masters of the megabyte , Peter Lyman and Hal Varian , professors at the University of California-Berkeley 's School of Information Management and Systems .