Dow Jones Industrial Average, S&P 500 Gain As Oil Prices Boost Energy Sector Following Iran Nuclear Deal

U.S. stocks traded higher Tuesday, shrugging off a brief drop in oil prices after Iran and six global powers struck a historic nuclear deal, renewing fears of crude oversupply. Meanwhile, U.S. retail sales unexpectedly fell in June, raising concerns that the U.S. economy is slowing as consumers cut back on spending last month.