US stock market crash Dow S&P 500 Nasdaq big fall today deepened as the Nasdaq dropped over 1.4% and the Dow Jones Industrial Average lost more than 400 points in early trade. Markets are reacting fast. Oil prices surged above $110 after tensions near the Strait of Hormuz. Investors fear supply shocks. Bond yields climbed to 4.46%, adding pressure on equities. The S&P 500 also slipped nearly 1%, extending weekly losses. Weak US consumer sentiment data added to the stress. Inflation expectations are rising again. Here is why the US stock market crash Dow S&P 500 Nasdaq big fall today is accelerating across Wall Street.