FinancePy Merton calibration changes when equity and debt are expressed in a different common monetary unit. Synthetic native Python tests isolate a unit-dependent calibration objective.

Report: https://www.gero.uz/research/articles/financepy-merton-monetary-scale.html
Evidence archive: https://zenodo.org/records/22757428
Public artifact: https://github.com/kadyrbekovhamit-cyber/gero-numerical-observatory/blob/main/catalog/reports/financepy-merton-monetary-scale.md
Primary sources:
https://github.com/domokane/FinancePy/commit/2b9227fea9d832c4033421d6cd53a54316414fca

Synthetic calibration evidence only. No bank deployment, real customer ratings or losses measured. The local normalization candidate passes 120 numerical checks; 39 optimizer non-success statuses remain. No universal convergence or upstream acceptance claim.

Research and editorial review: Xamit Kadirbekov / GERO Research. Independent work; no affiliation with the organizations discussed.
Narration: synthetic English preset Microsoft Jenny Neural via edge-tts. Original diagrams; AI-assisted preparation.

#FinancePy #NumericalComputing #SoftwareTesting #Shorts
