S&P 500 falls 1.7% for its worst day since May, Dow sheds 600 points
(CNBC) — U.S. stocks began the week deeply in the red as investors continued to flock to the sidelines in September amid several emerging risks for the market.
The S&P 500 fell 1.7% to 4,357.73, posting its worst daily performance since May 12. It was…