Shares ended the week on a mixed note as blue chips faltered following a profit warning from heavy machinery giant Caterpillar while the Nasdaq soared to its 13th record close in 16 sessions.

The Dow Jones closed down 31.81 points, or 0.29% at 11,003.89, a day after it closed above 11,000 for the first time in more than two months.

For the week, the Dow was up 234.57 points.

Caterpillar accounted for all of the Dow's loss after the world's largest construction equipment maker warned that slow sales in North America would hurt its fourth quarter results, sending shares in the company 6 3/4 lower to 49 3/16.