Implied Volatility (30 Day)

Returns the 30-day implied volatility, which is the standard benchmark for measuring options market volatility. This is the most commonly referenced IV measurement in options trading.

Why 30-Day IV?

30-day IV is the industry standard because:

  • Aligns with typical monthly option cycles
  • The VIX index uses 30-day IV calculation
  • Provides a consistent benchmark across stocks

Return Value

Returns a decimal value representing annualized volatility:

  • 0.15 = 15% annualized IV (low volatility, like SPY)
  • 0.30 = 30% annualized IV (moderate volatility)
  • 0.60 = 60% annualized IV (high volatility, like meme stocks)

Expected Move Calculation

To estimate the expected one standard deviation move over 30 days:

Expected Move = Stock Price * IV * SQRT(30/365)

Parameters

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

Typical IV Ranges

Stock Type Typical IV Range
Large-cap stable (JNJ, PG) 15-25%
Tech (AAPL, MSFT) 20-35%
Growth (TSLA, NVDA) 40-70%
Meme stocks 60-150%+

Examples

=ImpliedVolatility30d("AAPL")
Apple 30-day IV (most common)
=ImpliedVolatility30d("TSLA")
Tesla 30-day IV
=ImpliedVolatility30d("SPY")
SPY 30-day IV (compare to VIX)
=ImpliedVolatility30d("AAPL",DATE(2024,1,15))
Historical 30-day IV
=ImpliedVolatility30d(A1)
Symbol from cell
=ImpliedVolatility30d("AAPL")*100
Convert to percentage (23%)

When to Use

  • Standard IV reference for any stock
  • Comparing volatility across stocks
  • Options pricing and strategy selection
  • VIX-like analysis for individual stocks

When NOT to Use

Scenario Use Instead
Need IV ranking ImpliedVolatilityRank1y()
Weekly options ImpliedVolatility10d()
Long-term LEAPS ImpliedVolatility1y()
Need to compare to historical ImpliedVolatilityPct1y()

Common Issues & FAQ

Q: How does this compare to VIX? A: VIX measures 30-day IV for S&P 500 options. ImpliedVolatility30d("SPY") should be similar to VIX.

Q: How do I convert to percentage? A: Multiply by 100: =ImpliedVolatility30d("AAPL")*100 returns 23 for 23%.

Q: How do I calculate expected move? A: For a 30-day expected move (1 standard deviation): =Last("AAPL")*ImpliedVolatility30d("AAPL")*SQRT(30/365)

Q: What's considered high IV? A: It depends on the stock. Use ImpliedVolatilityRank1y() to see if current IV is high relative to its own history.

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