The U.S. stock market experienced a significant selloff on Halloween, resulting in nearly $953 billion being wiped out in a single day. This sharp decline was largely attributed to a selloff in the tech sector, marking the biggest drop in months. The Nasdaq Composite suffered its worst day in nearly two months. The S&P 500 was also affected. Investors are also anticipating further volatility due to upcoming nonfarm payroll data and next week's election. Intraday options flows indicated a particularly tough day for stocks.