Reference Data

If you're building or fixing a security master, client master, or account master system, this walks through the data models and governance patterns that financial services firms actually use. It covers identifier mapping (CUSIP, ISIN, SEDOL, FIGI), pricing data hierarchies, and the thorny bits like handling corporate actions that break your mappings. The guidance is opinionated about golden source designation and when to trust custodian data versus your own. Most useful when you're designing reference data architecture from scratch or debugging data quality issues that trace back to stale identifiers or missing cross-references. Less useful if you just need to call a vendor API.

Install to Claude Code

npx -y skills add joellewis/finance_skills --skill reference-data --agent claude-code