The technology-laced Nasdaq Composite Index added 28.73 points , or 1.77 percent , at 1,655.22 .
The technology-laced Nasdaq Composite Index added 28.73 points , or 1.77 percent , at 1,655.22 .
The broader Standard & Poor 's 500 Index gained 16.02 points , or 1.62 percent , at 1,004.63 .