Futures for the Dow Jones Industrial Average and other major stock indexes wavered Tuesday, as Wall Street reacted to a number of key economic reports. In stocks, Nvidia (NVDA) and Tesla (TSLA) traded mixed, while Spotify (SPOT) plunged on earnings. Ahead of the opening bell, Dow Jones futures edged downward after posting early gains. S&P 500 futures dropped 0.5%, as the…