Wall St tumbles with Microsoft, Caterpillar; data weighs

U.S. stocks fell sharply on Tuesday, with Microsoft and Caterpillar shares tumbling after quarterly results, while an unexpected decline in durable goods orders also weighed on sentiment. Microsoft fell 10 percent to $42.27 the day after the Dow component reported results. Shares of construction and mining equipment maker Caterpillar fell 7.5 percent to $79.52 after its net profit came in below market expectations. "U.S. equities could come under pressure as investors ratchet down their gro