feat: portfolio risk score from bond ratings mix #302

[laurentketterle-hub]

Portfolio Risk Score from Bond Ratings Mix

Closes #302

Changes

• PortfolioRiskScore component: Weighted risk algorithm from bond portfolio ratings (AAA→D)
• 5-tier risk scale: Very Low → High Risk with color-coded badge
• Per-holding breakdown: Symbol, rating, weight, risk contribution
• Memoized computation: useMemo for optimal performance
• Tests: Mixed portfolio, empty state, all-AAA, edge cases

Algorithm

Score = sum(rating_score[rating] × weight%) / total_weight% × 100
Tiers: ≤5 Very Low | ≤12 Low | ≤25 Moderate | ≤50 Elevated | >50 High

Test

npm test -- PortfolioRiskScore

CI

Requires first-time contributor approval.

[vercel]

@laurentketterle-hub is attempting to deploy a commit to the David Dada's projects Team on Vercel.

A member of the Team first needs to authorize it.