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Read the source column definitions
A percentage return dispersion and a currency mean loss do not form one compatible parameter pair. A reported variance also needs a square root before it can be used as standard deviation. Identify the source objects before entering numbers.
Record any loss conversion
For a fixed positive starting value and simple return, loss L=−Vr reverses the mean sign and scales standard deviation by V. Other cash-flow or nonlinear pricing constructions need their own loss definition; do not infer that setup from a tool label.
Check input readiness
| Field | Question |
|---|---|
| Mean | Mean of return, profit or loss? |
| Dispersion | Variance or standard deviation? |
| Unit | Percentage, currency or teaching units? |
| Horizon | Same period for both moments? |
| Law | Normal assumption or evidence? |
| Exposure | Linear transformation or another pricing model? |
Keep the estimate with the result
The calculator receives no observation dates and cannot restore missing estimator information. Retain the actual data record or clearly label assumptions before using the outputs as an empirical summary.