Implied Volatility Percentile (1 Year)

Returns the implied volatility percentile over a 1-year (52-week) lookback period. IV Percentile shows what percentage of trading days over the past year had a lower IV than today.

Calculation

IV Percentile = (Days in Year with IV < Current IV) / Total Trading Days * 100

IV Percentile vs IV Rank

Metric What it Measures
IV Percentile % of days with lower IV (distribution-based)
IV Rank Position within IV range (high-low based)

Interpretation

IV Percentile Meaning
0-25% IV lower than 75% of past year
25-50% Below average IV
50-75% Above average IV
75-100% IV higher than 75% of past year

Parameters

Parameter Type Required Description
Symbol string Yes Stock ticker symbol
StartDate date No Historical date (defaults to current)

Syntax

=ImpliedVolatilityPct1y(Symbol, [StartDate])
Excel Desktop (Windows)

Examples

=ImpliedVolatilityPct1y("AAPL")
Current 1y IV percentile for Apple
=ImpliedVolatilityPct1y("TSLA")
Tesla 1y IV percentile
=ImpliedVolatilityPct1y("SPY")
SPY 1y IV percentile
=ImpliedVolatilityPct1y("AAPL",DATE(2024,1,15))
Historical IV percentile
=ImpliedVolatilityPct1y(A1)
Symbol from cell

When to Use

  • Understanding IV relative to full year history
  • Long-term options strategy planning
  • Screening for volatility opportunities
  • Annual volatility analysis

When NOT to Use

Scenario Use Instead
Need IV rank ImpliedVolatilityRank1y()
Need short-term perspective ImpliedVolatilityPct1m()
Need raw IV value ImpliedVolatility()
Need specific period IV ImpliedVolatility30d(), etc.

Common Issues & FAQ

Q: What's the difference between IV Percentile and IV Rank? A:

  • IV Percentile (this): % of days with lower IV - considers distribution
  • IV Rank: Position in high-low range - only uses extremes

For example, if IV spent most of the year low but had one very high spike:

  • IV Percentile would show current moderate IV is higher than most days (high %)
  • IV Rank might show moderate (mid-range between low and the spike)

Q: When should I use 1-year vs 1-month percentile? A:

  • 1-Year: For LEAPS, long-term strategies, accounting for market cycles
  • 1-Month: For short-term trades, recent volatility context

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