How volatility is measured
Two flavors matter:
- Realized volatility (RV) — the actual standard deviation of returns over a past window (typically 10, 30, or 90 days). Backward-looking, computed from price data.
- Implied volatility (IV) — derived from option prices. Forward-looking; reflects what the market expects future vol to be. IV is quoted per-expiry and per-strike.
The gap between realized and implied vol is the core opportunity set for options traders. If 30-day realized is 45% and 30-day implied is 65%, option sellers are receiving more premium than a pure statistical model would justify — which is often, but not always, a profitable stance.
Why crypto vol is different
Crypto markets trade 24/7 with fragmented liquidity, no circuit breakers, and heavy leverage. That combination produces sharper short-term moves than equities. Vol clusters more aggressively too — calm weeks of 30% annualized can flip into crisis weeks of 200%+ within hours (the Luna collapse, FTX insolvency, and flash crashes all featured vol regimes of 5-10x the prior week).
The Crypto Volatility Index (BVIV and EVIV from Volmex) tracks BTC and ETH implied vol; Deribit’s DVOL is the on-exchange equivalent. Both are used by desks to time entries and exits on vol-sensitive strategies.
Risks and considerations
For directional traders, high vol means wider stops, smaller positions, and more careful leverage. For vol sellers (covered calls, short straddles, LP provision on options DEXs), the classic failure mode is regime shift: a strategy tuned to 50% vol gets wrecked when vol spikes to 150%. Options spreads widen when IV is high, and liquidity evaporates during the most volatile moments — meaning hedges may not be available exactly when you need them. Treat vol as a market state, not a constant, and size positions so a 2-3x spike in realized vol is survivable.