The S&P 500 has increased by 17.8% during the first 317 trading days of U.S. President Donald Trump's second term. According to NS3.AI, both the Nasdaq and S&P 500 achieved record highs in early 2026. Factors contributing to this growth include consumer spending, tax relief, higher tax refunds, and earlier Federal Reserve rate cuts. However, rising oil prices and tariff threats have increased costs for households.