Cross-Validation

Purpose

Verify key financial data points by cross-referencing values across two or more independent data sources. Detect discrepancies that may arise from differences in reporting periods, accounting adjustments, rounding conventions, or outright data errors. Produce a validation report that flags confirmed data, discrepancies above a defined threshold, and metrics with only single-source coverage, so downstream analysis rests on trustworthy inputs.

Data Fetching Process

Consult ${CLAUDE_PLUGIN_ROOT}/skills/_shared/references/data-sources.md for full source details and fallback behavior.

Source Selection Rules

1. Determine the primary source of the data being validated. Identify which source originally provided the data points under review:

   • If the original data came from SEC EDGAR, validate against Stock Analysis as the cross-check source.
   • If the original data came from Stock Analysis, validate against SEC EDGAR or Gurufocus as the cross-check source.
   • If the original data came from Gurufocus, validate against SEC EDGAR as the cross-check source.
   • If the original source is unknown or the user simply requests validation, fetch from both SEC EDGAR and Stock Analysis independently and compare.

2. Resolve the ticker. Fetch https://www.sec.gov/files/company_tickers.json using the sec-fetch skill (see data-sources.md), locate the company's CIK, and pad it to 10 digits. Cache the CIK and official company name.