U.S. stock futures were slipping Tuesday, with investors opting to take some profit following seven straight days of gains for the benchmark S&P 500.Futures tracking the Dow Jones Industrial Average fell 100 points, or 0.2%. S&P 500 futures and contracts tied to the tech-heavy Nasdaq 100 were each down 0.1%, after the gauges each notched record closing highs on Monday.The yield on the 10-year Treasury note ticked up 2 basis points to 4.17%. The U.S. dollar climbed 0.2% against a weighted basket of its peers ...