Wall St falls on mixed economic data; Apple weighs

The Nasdaq biotech index dropped 1.8 percent. Apple fell as much as 2.5 percent to $125.45 and was the biggest drag on the Dow, S&P 500 and the Nasdaq. The company limited availability of the Apple Watch after a key component was found to be defective, according to a report. Investors were also digesting a mixed bag of economic data which came in a day after data showed that the U.S. economy slowed to a crawl in the first quarter.