Nasdaq down today: The Nasdaq Composite fell nearly 2% today, dropping below 22,720 in sharp midday trading. Investors are reacting to a 5% plunge in NVIDIA stock despite strong earnings. The sell-off spread fast across AI stocks and semiconductor shares. The S&P 500 slipped over 1%. The Dow Jones fell about 0.4%. Traders fear AI stock valuations are stretched after a massive 40% sector rally in six months. Rising bond yield concerns and inflation data uncertainty added pressure. Today’s Nasdaq crash signals a reset in overheated tech stocks, not panic — but volatility is clearly back.