 I'm Maria Bartiromo, and this is the Fox Business Report. A down day on Wall Street Thursday. The Dow fell 533 points after three straight record closes in six straight winning sessions. The Nasdaq down 126. The S&P 500 lost 44. Amazon says its annual Prime Day event this week set fresh sales records. According to Adobe Analytics, online spending in the U.S. surged 11% year-to-year to $14.2 billion during the two-day event. Amazon did not provide any specific figures for the number of items sold.