Bitcoin · CoinDesk
One widely used metric is value-at-risk, or VaR, which estimates how much a portfolio could lose on a bad day
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Bitcoin's declining 30-, 90-, and 180-day volatility measures could therefore encourage investors to increase their exposure.
Key facts
- On Sept. 21, the day of bitcoin's latest 3-sigma jump, Paradigm facilitated a record $6.7 billion in options trades
- Diversified RWA stablecoins sustain 5-7% yield from real credit as crypto funding compresses to ~4%
- In a normal bell-shaped distribution, about 95% of moves fall within 2-sigma, and 99.7% within three
- Bitcoin's declining 30-, 90-, and 180-day volatility measures could therefore encourage investors to increase their exposure
Summary
Bitcoin has recorded 10 three-sigma trading days in 2026, exceeding the eight seen during the 2018 bear market, even as its annualized volatility has fallen to about 46% from 84%. The frequency of extreme moves suggests that standard value-at-risk models, which rely heavily on recent volatility, may understate bitcoin’s tail risk and encourage overly large portfolio allocations. Macroeconomic shocks and crowded derivatives trades can amplify sudden price swings, though deeper liquidity, stronger risk management and greater institutional participation have helped the market absorb them. Bitcoin BTC $82,680.67 is experiencing more unusually large price swings this year than during the 2018 bear market, even as its overall volatility has fallen sharply, and that's a challenge for anyone relying on standard risk models. The largest cryptocurrency has recorded 10 days in 2026 when its price moved at least three standard deviations from its recent trading pattern, according to a CoinDesk analysis.