IV Rank
IV's position in 52-week range
What is IV Rank?
IV Rank IV Rank is a normalized measure that tells you where current implied volatility sits within its 52-week range. Calculated as (current IV - 52-week low IV) / (52-week high IV - 52-week low IV) × 100, it's always bounded between 0 and 100. An IV Rank of 0 means current IV is at its 52-week low; IV Rank of 100 means it's at the 52-week high. IV Rank is the most-used signal for premium-selling timing. The standard framework: - IV Rank under 25: low IV environment, favor buying premium (long options, debit spreads) - IV Rank 25-50: below median, mild long-premium bias - IV Rank 50-75: above median, mild short-premium bias - IV Rank 75-100: rich premium environment, favor selling premium (credit spreads, iron condors) Tasty Trade's widely-cited research uses IV Rank above 50 as the standard entry filter for premium-selling strategies. Below this threshold, the absolute dollar premium is too small to compensate for the binary risk of credit spreads. IV Rank is different from IV Percentile. IV Rank measures range position (where in the high-low range), while IV Percentile measures how many days had lower IV (cumulative distribution). They typically agree but can diverge on underlyings with outlier IV spikes — a single high-IV event pulls IV Rank's denominator wide, while IV Percentile is more robust to outliers. A common pitfall: high IV Rank on a single-event-driven name (biotech ahead of an FDA decision, banks during a sector crisis) may not be the right signal. The IV is justified by the binary event ahead, and selling premium into that event is taking on the same risk the market is pricing. Use IV Rank as a starting filter, not a complete decision. IV Rank is dynamic. As new highs or lows are set in the 52-week window, the rank rebases. A vol expansion to a new 52-week high pushes IV Rank to 100 and stays there until a new high replaces it or vol declines. Practical implication: IV Rank in a structural vol expansion (like 2022 H1) can stay elevated for months.
Complete Definition
IV Rank is a normalized measure that tells you where current implied volatility sits within its 52-week range. Calculated as (current IV - 52-week low IV) / (52-week high IV - 52-week low IV) × 100, it's always bounded between 0 and 100. An IV Rank of 0 means current IV is at its 52-week low; IV Rank of 100 means it's at the 52-week high. IV Rank is the most-used signal for premium-selling timing. The standard framework: - IV Rank under 25: low IV environment, favor buying premium (long options, debit spreads) - IV Rank 25-50: below median, mild long-premium bias - IV Rank 50-75: above median, mild short-premium bias - IV Rank 75-100: rich premium environment, favor selling premium (credit spreads, iron condors) Tasty Trade's widely-cited research uses IV Rank above 50 as the standard entry filter for premium-selling strategies. Below this threshold, the absolute dollar premium is too small to compensate for the binary risk of credit spreads. IV Rank is different from IV Percentile. IV Rank measures range position (where in the high-low range), while IV Percentile measures how many days had lower IV (cumulative distribution). They typically agree but can diverge on underlyings with outlier IV spikes — a single high-IV event pulls IV Rank's denominator wide, while IV Percentile is more robust to outliers. A common pitfall: high IV Rank on a single-event-driven name (biotech ahead of an FDA decision, banks during a sector crisis) may not be the right signal. The IV is justified by the binary event ahead, and selling premium into that event is taking on the same risk the market is pricing. Use IV Rank as a starting filter, not a complete decision. IV Rank is dynamic. As new highs or lows are set in the 52-week window, the rank rebases. A vol expansion to a new 52-week high pushes IV Rank to 100 and stays there until a new high replaces it or vol declines. Practical implication: IV Rank in a structural vol expansion (like 2022 H1) can stay elevated for months.
Example
AAPL trading at 28% IV. 52-week IV range was 18% (low) to 42% (high). IV Rank = (28 - 18) / (42 - 18) × 100 = 41.7. AAPL IV is in the lower half of its annual range — modest long-premium bias, weak signal for selling.
Formula
Related Terms
Frequently Asked Questions
What is IV Rank?
IV Rank is a 0-100 measure of where current implied volatility sits in its 52-week range. 0 = at the annual low, 100 = at the annual high. Used for premium-selling timing; above 50 favors short premium, below 25 favors long premium.
What's a good IV Rank for selling premium?
Above 50 is the standard threshold (Tasty Trade's framework). Above 75 is the strongest sell-premium signal. Below 25, premium is too cheap to justify the risk of credit spreads.
How is IV Rank different from IV Percentile?
IV Rank measures range position. IV Percentile measures cumulative distribution (% of days with lower IV). They usually agree but can diverge on names with outlier vol spikes. IV Rank is faster-reacting; IV Percentile is more robust to outliers.
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