The S&P 500 is plunging after having its 10th-best day ever. How to navigate volatility. - MarketWatch
1. S&P 500 surged 9.5% after recent tariff news, marking significant gains since 2008. 2. Market volatility continues with a 4.7% decline following Wednesday's rally. 3. Historically, large one-day gains occur in bear markets, suggesting caution. 4. Tariff-related developments have sparked considerable market movements since April. 5. Retesting old lows may follow this type of sharp rally, indicating instability.