 Shares of Amazon were up slightly as its 10th Prime Day gets underway. The sales event runs through Wednesday and is exclusively for Prime members. The Dow winners UnitedHealth Group, Goldman Sachs, and Caterpillar. The Dow decliners Microsoft, Merck, and Chevron. The Dow up 743 points for its best day in a year. The Nasdaq up 37. S&P 500 up 36 for its 39th record close of the year. Hilary Barsky, Fox News. Thank you.