Wall Street flat as investors stay cautious

US stock indexes were little changed at the open on Friday after mixed quarterly reports from bellwether companies kept investors on the sidelines.

The Dow Jones industrial average fell 12.91 points, or 0.07%, to 17,969.61, the S&P 500 lost 4.77 points, or 0.23%, to 2,086.71 and the Nasdaq composite dropped 45.99 points, or 0.93%, to 4,899.89.