Stocks fall sharply to start September on worries about the economy. S&P 500 drops 2.1% and Dow sinks 626 points

Stocks fall sharply to start September on worries about the economy. S&P 500 drops 2.1% and Dow sinks 626 points

NEW YORK -- Stocks fall sharply to start September on worries about the economy. S&P 500 drops 2.1% and Dow sinks 626 points.