U.S. stock markets started August with mixed performance, as Dow Jones Industrial Average futures rose 547 points, or 1%; S&P 500 futures are expected to gain 0.5%. Nasdaq futures were flat as investors continued to assess the sustainability of last week's tech stock rally. Wall Street will see a busy earnings season this week, with about 20% of S&P 500 companies reporting results, including AMD, Caterpillar, McDonald's, Eli Lilly, Disney, Uber, Airbnb, and Berkshire Hathaway.