The Dow Jones industrial average fell four points to 13,653 shortly after the opening bell Tuesday.
The Standard & Poor's 500 index was down less than a point at 1,485 and the Nasdaq composite edged up a point to 3,136.
Chemical maker DuPont rose after reporting income that beat Wall Street's forecasts.
Johnson & Johnson beat most expectations for the final quarter of the year, but its stock slipped bell due to a weak forecast for this year.
Earnings reports continue after the market closes with Google, IBM, CSX and Norfolk Southern.