Volatility

Implied against realized volatility for every optionable stock and ETF: IV rank, term structure, skew, expected moves and a daily history.

• GET /options/volatility: Volatility. One symbol's 30-day ATM IV against its past year and its realized vol, the ATM term structure, 25-delta skew and the moves options price. Live in regular hours, the last close outside them.
• GET /options/volatility/history: Volatility history. Daily 30-day ATM IV with its rank and percentile, realized vol and the close, oldest first, from November 2025.

Updated 2026-11-06 15:46 UTC