US STOCKS-Earnings cloud drags down Dow; Nasdaq gains on biotech M&A
* Yahoo, Chipotle down after the bell, Yum and Broadcom gain
* Mylan shares up almost 9 pct after Teva bid
* Dow ends down 0.47 pct, S&P down 0.15 pct, Nasdaq up 0.39 pct (Adds detail on extended trade moves)
By Noel Randewich
April 21 (Reuters) - U.S. stocks were a mixed bag on Tuesday, with the Dow ending lower after a handful of uninspiring earnings reports while the Nasdaq closed near a record high following a proposed biotech merger.
Travelers, DuPont and IBM shares weighed on the Dow Jones industrial average. 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 ended the session 2.95 percent lower at $70.69 and IBM fell 1.14 percent to $164.26.
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 struggled to gauge how much a strong dollar has hurt U.S. multinationals, including technology companies like Facebook, Google, Qualcomm and Microsoft that sell many of their products and services overseas and are expected to report their earnings this week. Continuación...