IV Rank and IV Percentile: Comparing Volatility Levels
Learn to contextualize IV with IV rank and percentile—essential tools for knowing when options are cheap or expensive.
IV Rank and IV Percentile
are metrics that compare current IV to historical IV levels. They tell you whether IV is high or low relative to its past range.
IV Rank = where current IV falls within 52-week high/low range. IV Percentile = percent of days IV was lower than today.
IV Rank shows where IV is in its range (0-100). IV Percentile shows % of days IV was lower. Both help determine if options are cheap/expensive. High IVR (>50) = consider selling. Low IVR (<30) = consider buying.
Why We Need IV Context
Knowing IV is 30% doesn't tell you much. Is that high for this stock? Low? You need context.
TSLA with 30% IV is very low. A utility stock with 30% IV is extremely high. IV Rank and Percentile provide this context.
IV Rank (IVR)
IV Rank shows where current IV falls within the 52-week high-low range.
Formula: (Current IV - 52wk Low) ÷ (52wk High - 52wk Low) × 100
Example: IV at 35%, 52wk low 20%, 52wk high 60%
IVR = (35-20) ÷ (60-20) × 100 = 37.5%
IV Percentile (IVP)
IV Percentile shows the percentage of days over the past year when IV was lower than it is today.
Example: IVP of 80% means IV was lower than today on 80% of the past year's trading days.
How to Use Them
| Level | Interpretation | Strategy Bias |
|---|---|---|
| IVR > 50% | IV is elevated | Consider selling premium |
| IVR < 30% | IV is low | Consider buying options |
| IVR 30-50% | IV is average | Either direction |
Key Takeaways
- IV Rank = position in 52-week range
- IV Percentile = % of days IV was lower
- High IVR = options expensive, consider selling
- Low IVR = options cheap, consider buying
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