The S&P 500, Nasdaq Composite, and Dow Jones Industrial Average have had a tumultuous 2025 so far, with record highs and significant drops. A valuation tool is warning investors loudly about the market. Time in the market has historically outperformed trying to time market downturns. Concerns over valuations, trade policy, inflation, and credit ratings loom over the market. The Shiller P/E Ratio, with a 100% success rate, is signaling potential trouble. The ratio is near all-time highs, suggesting a possible 30% decline in the S&P 500. Despite the warnings, history shows that long-term investors are rewarded for patience in the market.

Read more at Yahoo Finance: The S&P 500 Is Going to Plunge at Least 30%, Based on What a Forecasting Tool With a 100% Historical Success Rate Has to Say