Wall Street experienced significant volatility in 2025, marked by President Trump's imposition of punitive tariffs and a global trading system disruption. Initial market selloffs, including a nearly 10% drop in Amazon, led the S&P 500 to the brink of a bear market. However, sentiment reversed, triggering a swift recovery to new record highs. The year rewarded nimble investors who bought dips, with the US economy and AI boom also influencing market swings.