Quick guide
How to use this calculator
- Enter observations in chronological or paired order exactly as the row help specifies.
- Keep all return periods, currencies, weights, and value units consistent.
- Review the sample, population, quantile, or compounding convention before interpreting the result.
Calculation method
Calculation method
Active share = 0.5 × Σ|portfolio weight − benchmark weight|.
Entered fixed decimals are parsed exactly. Statistical square roots and geometric averages are marked approximate and reject undefined or non-finite cases.
Worked example
Worked example
Portfolio weights 60/40 versus benchmark 50/50 produce active share 10%.
Active share = 0.5 × Σ|portfolio weight − benchmark weight|.
Supported inputs
Precision and limits
Visible input limits
Lists accept 1–2,000 rows. Each fixed decimal accepts at most 30 digits and 12 decimal places and is capped at an absolute value of 1e12. Formula-specific positive, weight, and probability domains are enforced.
International scope
No currency, exchange, benchmark, security, observation frequency, market-data source, or regulatory risk convention is selected automatically.
Decision boundary
Historical and scenario statistics do not predict returns, measure every risk, cap losses, or recommend an investment.
Calculator-specific assumptions
Results use only visitor-entered observations. They are descriptive calculations, not forecasts, trading signals, risk guarantees, or investment recommendations.