Wall Street's Strong Gains Will Be Tested Before Labor Day
1. U.S. stocks face pivotal weeks impacting market performance. 2. S&P 500 profits forecast to rise 12.7% this quarter. 3. Nvidia’s earnings on Aug. 27 could influence future semiconductor demand. 4. Nvidia accounts for about 20% of S&P's year-to-date gains. 5. Expectations for Federal Reserve rate cuts may boost market sentiment.