U.S. stocks were subdued at open on Monday, ahead of a key inflation reading and commentary from Federal Reserve policymakers later in the week, while retailers were in focus as holiday shopping picked up steam with Cyber Monday deals.

The Dow Jones Industrial Average fell 13.71 points, or 0.04 percent, at the open to 35,376.44. The S&P 500 opened lower by 4.48 points, or 0.10 percent, at 4,554.86, while the Nasdaq Composite dropped 11.55 points, or 0.08 percent, to 14,239.31 at the opening bell.