BTC: Volatility of Implied Volatility (30 Days)
Shown as its 3 Oct – 1 Nov 2026 sample; the latest readings and full history are included with Plus.
How much 30-day at-the-money implied volatility of BTC options has been swinging day to day.
Why use it. Vol of vol is the unease of the volatility market itself: a rising figure means the market keeps re-pricing what it expects, which often comes before a large move. How to read it. In volatility points per day. Higher: implied volatility is changing fast. Compare with its own past range.
Calculation. Standard deviation over the last 30 days of the daily change in the 30-day trade-implied at-the-money implied volatility, in volatility points; at least 20 days of changes. Trade-implied: each day's smile is rebuilt from that day's Deribit trades. For every expiry more than a day away, one point per strike (the out-of-the-money contract's volume-weighted implied volatility and log-moneyness against the index price at each trade, at least six strikes on both sides of the money) is fitted with raw SVI as on our fitted surface, then interpolated in total variance to each constant maturity between the two bracketing expiries, never extrapolated. The index price stands in for the forward, so a long tenor can differ from a forward-based reading by a fraction of a volatility point. Days with too few traded strikes have no value. Checked against our fitted surface over the 25 days both exist (14 October to 8 November 2026): the 30-day reading differs by 0.4 volatility points on average, the 7-day by under 1.2, the 25-delta risk reversal by about 0.5 and the butterfly by 0.1. Deribit's DVOL, a different whole-smile construction, runs a median of about 3 points higher with a 0.99 correlation over more than 2,000 days.