Don't look now, but the Dow is making another push for a record close. The blue-chip index was up 121 points, or 0.3%, trading a touch above its Dec. 4 record close of 45,014.04. The index opened at its highest levels on record but has traded sideways for much of the morning.

The blue-chip Dow briefly hit a record high on Friday, as UnitedHealth's shares jumped after Berkshire Hathaway raised its stake in the health insurer, while investors assessed mixed data to gauge the Federal Reserve's monetary policy path this year.