Earnings trigger Wall St selloff, data weighs further

By Rodrigo Campos NEW YORK (Reuters) - U.S. stocks tumbled on Tuesday, with Microsoft and Caterpillar shares down sharply after quarterly results, while an unexpected decline in durable goods orders also weighed on sentiment. Microsoft fell nearly 9 percent to $42.93 the day after the Dow component reported results. Shares of construction and mining equipment maker Caterpillar fell 7.4 percent to $79.69 after its net profit came in below market expectations. "U.S. equities could come under