Wall Street's CBOE Volatility Index surged 12% as market saw sharp reversal on November 20, erasing $2.7 trillion in market value. The day saw major intraday swings, Nasdaq and Dow moved 1,000 points between peaks and lows, noting highest volatility since April. Nvidia significantly impacted Nasdaq 100, reversing 2.4% early gain and declining by 3.2%, resulting in $400 billion loss.