Bitcoin Seven-Day Volatility Registers 32.6%, Below 30-Day Reading

Bitcoin (BTC) options priced seven-day implied volatility at 32.6% on Oct. 21, below the 30-day reading of 35.5%, following a week of increased demand for U.S. stock hedges. For the week ended Oct. 16, the Nasdaq-100 shed 5.5%, its sharpest weekly decline since April 2025. The Cboe Volatility Index (VIX) rose about five points to 20 over the same period as demand for protection against S&P 500 losses increased. The VIX measures expected swings in the stock index over 30 days. Bitcoin had traded between roughly $80,000 and $84,000 for about two weeks. By Oct.