Wall St. mixed as earnings offset merger news

Traders work on the floor of the New York Stock Exchange April 20, 2015.Reuters/Brendan McDermid n”>(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 (TRV.N), DuPont (DD.N) and IBM (IBM.N) shares weighed most on the Dow. DuPont¬†[…]