Dow Jones futures fell Monday morning, along with S&P 500 futures and especially Nasdaq futures. Key economic data and earnings loom.Apple plans to redesign the iPhone for the first time in five years and introduce a new smart home hub,

The Nasdaq Composite increased 243.30 points or 1.2% to close at 19,864.98, also booking back-to-back gains. The tech-heavy index is up 2.9% year to date, its best start to a year since 2009, when it rose 4.8%.

The buck's latest surge comes as rising Treasury yields attract funds, and so-called 'U.S. exceptionalism' - a strong economy containing many of the world's biggest and most successful companies - encourages global investors to buy American assets.