Stock Volatility Nine Months
Calculates the historical volatility of a stock over the past 9 months (approximately 270 days).
Syntax
=StockVolatilityNineMonths(symbol)Returns
number
9-month volatility as decimal
Examples
=StockVolatilityNineMonths("AAPL")When to Use
- Three-quarter risk assessment
- Long-term trend analysis
- Annual planning inputs
When NOT to Use
| Scenario | Use Instead |
|---|---|
| Semi-annual | StockVolatilitySixMonths() |
| Full year | StockVolatilityOneYear() |
Common Issues & FAQ
Why 9 months specifically?
Captures three quarters of data, useful for year-end projections.
Excel Templates Using Stock Volatility Nine Months
These ready-made MarketXLS templates call StockVolatilityNineMonths() in their worksheet formulas. Open one to see the function working inside a complete model.
Related Formulas
More MarketXLS MarketXLS Analytics formulas you can use in the same worksheet:
- Stock Volatility Seven Days
- Stock Volatility Thirty Days
- Stock Volatility Three Months
- Stock Volatility Three Years
- StockChart
- Theta
- Ticker Name
- Time Series Forecast
See StockVolatilityNineMonths used in a complete workbook: Stock Volatility Calculator: How to Measure & Calculate Volatility in Excel
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