A trader works on the floor of the New York Stock Exchange (NYSE) in New York, U.S., October 23, 2018. REUTERS/Brendan McDermid The S&P 500 has yet to bottom, said Nuveen investment chief Saira Malik. The benchmark index is on track to end its worst first half of the year since 1970. “I think the bear market can’t end until inflation shows consistent signs of moderating,” Malik said.