Implied Volatility Rank (1 Month)
Returns the implied volatility rank based on a 1-month lookback period. IV Rank shows where the current IV stands relative to its high and low over the specified period.
Calculation
IV Rank = (Current IV - 1m Low IV) / (1m High IV - 1m Low IV) * 100Interpretation
| IV Rank | Meaning | Strategy Implication |
|---|---|---|
| 0-25 | Low IV | Consider buying options |
| 25-50 | Below average | Neutral |
| 50-75 | Above average | Consider selling options |
| 75-100 | High IV | Favor selling strategies |
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
| Symbol | string | Yes | Stock ticker symbol |
| StartDate | date | No | Historical date (defaults to current) |
Notes
- 1-month is a shorter lookback period (more reactive to recent changes)
- For longer-term perspective, use
ImpliedVolatilityRank1y() - IV Rank is different from IV Percentile
Examples
=ImpliedVolatilityRank1m("AAPL")=ImpliedVolatilityRank1m("TSLA")=ImpliedVolatilityRank1m("SPY")=ImpliedVolatilityRank1m("AAPL",DATE(2024,1,15))Symbol from cell
When to Use
- Deciding between buying or selling options
- Screening for high/low IV stocks
- Timing options strategies
- Short-term volatility analysis
When NOT to Use
Common Issues & FAQ
Q: What's the difference between IV Rank and IV Percentile? A:
- IV Rank: Where current IV is relative to the range (high-low)
- IV Percentile: What percentage of days had lower IV
Q: Why is 1-month rank different from 1-year rank? A: The 1-month rank uses a shorter lookback period, so it reflects more recent volatility changes. The 1-year rank provides a longer-term perspective.
Q: What's considered high IV Rank? A: Generally, above 50 is considered elevated, and above 75 is considered high. Use this to favor selling options strategies.
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