US STOCKS-Wall St mixed as doubts about earnings offset biotech M&A bid
* Yahoo, Chipotle, Yum to report after the close
* Mylan shares up almost 10 pct after Teva bid
* Dow off 0.45 pct, S&P down 0.1 pct, Nasdaq up 0.48 pct (Updates to afternoon)
By Noel Randewich
April 21 (Reuters) - U.S. stocks were mixed on Tuesday, with the Dow industrials pulled down by a handful of uninspiring earnings reports, while the Nasdaq was pushed higher by a proposed biotech merger.
Travelers, DuPont and IBM shares weighed on the Dow. DuPont reported lower sales in all of its businesses and said a strong dollar would take a toll on its full-year earnings. IBM also mentioned currency effects when it reported a fall in revenue late on Monday.
DuPont was down 2.73 percent at $70.84 and IBM fell 1.14 percent.
March-quarter earnings season is in full swing, with almost 73 percent of the S&P 500 components that have reported so far beating bottom-line expectations, but just 42.2 percent beating expectations for revenue.
Investors are gauging how much a strong dollar has hurt U.S. multinationals, including technology companies like Facebook , Google, Qualcomm, Microsoft that sell many of their products and services overseas and are expected to report their earnings this week. Continuación...