U.S. stock futures were struggling early Tuesday following record highs in the previous session. S&P 500 futures were edging up less than 0.1% and Nasdaq 100 futures were down 0.1%. The S&P and Nasdaq Composite hit new highs on the first trading day of December but will be tested this week by a series of economic data releases,

S&P 500 futures are up 0.05%. Dow Jones Industrial Average futures are barely changed. Nasdaq 100 futures are barely changed. On Monday, the Dow Jones Industrial Average fell 129 points, or 0.29%, to 44,