U.S. equity futures fell on Sunday evening as investors kick off a holiday-shortened week of trading. Futures tied to the Dow Jones Industrial Average dropped 253 points, or 0.6%. S&P 500 futures and Nasdaq 100 futures lost 0.5% each. The three major averages sank on Friday . The Dow Jones Industrial Average tumbled 793.47 points to 45,166.64. The S&P 500 dropped 1.67% to a seven-month low of 6,368.85, notching its fifth-straight weekly decline. The Nasdaq Composite declined 2.15% to 20,948.36.