Donald Trump's first 100 days: How has stock market performed?
1. S&P 500 declined 7.9% in Trump's second term's first 100 days. 2. This is the second worst presidential term performance since WWII. 3. Historical data suggests poor first 100 days correlates with full-year declines. 4. Tariff policies may create market volatility and recession risks. 5. Next 100 days crucial for predicting full-year market performance.