This Wall Street pro saw the stock-market chaos coming. He says investors should wait to buy again. - MarketWatch

1. J.P. Morgan's Cembalest warns of potential 10-15% market correction in 2025. 2. Tariffs and Trump's policies create volatility and risk for investors. 3. Leading indicators suggest possible U.S. economic contraction. 4. Stocks bounced back, but volatility has heightened in recent weeks. 5. Cembalest draws historical parallels to warn of tariff implications.