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Check the observation record
Verify matched period keys, common return/currency/income/cost basis and raw versus excess status. Do not independently shorten or reorder one list. Retain the intended benchmark and estimation window.
Check the line definition
Confirm asset-on-benchmark direction, equal weights and an intercept. Use centered cross-products and the benchmark squared sum, then recover the intercept from both means.
Review different objects
| Output | Question |
|---|---|
| Slope | Which proxy and direction? |
| Intercept | Which return basis and zero-X context? |
| Correlation | Which sign and defined dispersions? |
| R² | Defined response variation and descriptive meaning? |
| Residual error | Which unit and degrees of freedom? |
| Plots | Which remaining pattern or source issue? |
Retain the specific missing evidence
A period mismatch needs data repair; an unusual point needs source/influence review; an inference request needs its assumptions and uncertainty method. Repeating a coefficient calculation cannot resolve an undefined input basis.