According to @KobeissiLetter, the Dow Jones Industrial Average experienced a significant intraday decline, initially rising by 300 points before plummeting by as much as 1,100 points within hours. Concurrently, the S&P 500 saw a substantial decrease in market capitalization, losing approximately $1.5 trillion between 10:00 AM and 3:30 PM ET. This sharp movement in major indices highlights the volatility and rapid shifts impacting traders in the current market environment.