Trump's first 100 days are the worst for the stock market since Nixon
1. Trump's first 100 days marked a 7.9% drop in S&P 500. 2. This is the second worst start since Nixon in 1970s. 3. Market correction follows aggressive trade policies raising recession fears. 4. S&P 500 erased all post-election gains from November. 5. Investors unsure, potential for further declines suggests market volatility.