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Use the original example record
The CSV includes five hypothetical period pairs and columns for period/date key, benchmark and asset return percentages, currency/basis, source and unresolved questions. Its period numbers are example ordering, not historical market dates.
Retain both members of each pair
A missing or excluded observation needs a treatment that preserves alignment. Independently shortening one list can rotate subsequent pairs and change covariance while leaving individual series summaries unchanged.
Complete the input evidence
| Field | Purpose |
|---|---|
| Period key | Matched start/end interval |
| Return percentages | Common unit representation |
| Benchmark identity | Chosen explanatory series |
| Currency/income/costs | Compatible return definition |
| Raw/excess status | Risk-free treatment |
| Source | Observation origin and estimator context |
Keep the worksheet’s role clear
This is a static documentation record, not a price feed or automatic fitting spreadsheet. Use the calculator for the descriptive computation after resolving source and matching questions.