US stock futures wobbled on Monday as investors geared up for a busy stretch of economic data and corporate earnings, following a turbulent week that ended with the Dow reaching a record close above 50,000. Dow Jones Industrial Average futures (YM=F) fluctuated between small gains and losses, as did contracts on the S&P 500 (ES=F) and the tech-heavy Nasdaq 100 (NQ=F). On Friday, the Dow (^DJI) surged more than 1,200 points, or 2.5%, notching its first-ever close above 50,000 after briefly crossing the m ...