The Standard & Poor 's 500 index rose 11.14 , or 1.2 percent , to 931.41 . "
The Standard & Poor 's 500 Index gained 10.89 , or 1.2 percent , to 931.12 as of 12 : 01 p.m. in New York .
a graphical method which aids decision making by identifying and quantifying possible outcomes, probabilities of outcomes and expected values of outcomes