KEY POINTS
  • The U.S. Dollar Index hits its highest level since May 2017.
  • Slowing global growth abroad is strengthening the United States currency.
  • "Going forward, the dollar will have a hard time declining unless the Fed gets aggressively dovish,," says Tom Essaye, founder of the Sevens Report.

The dollar hit a two-year high on Tuesday as slowing global growth and more aggressive monetary easing overseas sent investors into the reserve currency.

The U.S. Dollar index rose to 99.37, its highest level since May 2017, when it hit 99.696. The index, which measures the greenback against a basket of other currencies, is teetering near the 100 level, which it hasn't hit since April 2017.