U.S. July auto sales miss estimates, shares drop

The biggest U.S. automakers on Tuesday reported July U.S. sales that disappointed Wall Street as skittish investors feared the industry's long pleasure trip of strong sales may soon be over, sending their shares skidding about 4 percent. General Motors Co reported that sales fell 2 percent to 267,258 vehicles, at the low end of expectations, while Ford Motor Co posted sales of 216,479 vehicles, down 3 percent. Each of Ford's four top-selling models lost ground, including the Explorer SUV, which