U.S. stocks rose slightly on feather-light volume on Friday , as Wall Street regrouped after the biggest-ever power outage in North America .
U.S. corporate bond yield spreads tightened in spotty trading on Friday as Wall Street labored to get back on its feet after the largest power outage ever in North America .
a graphical presentation of a sequence of interrelated decisions to be made under assume risk. classified specific entities into classes based on its features.