What does Pillar 1 of the Basel framework require for minimum regulatory capital?

Question

AcadiFi · Accepted Answer

Pillar 1 establishes minimum capital requirements as ratios of eligible capital to risk-weighted assets.

Unlock with Scholar — $19/month

Get full access to all Q&A answers, practice question explanations, and progress tracking.

No credit card required for free trial

RWA aggregates three risk types:
- **Credit risk**: Standardized Approach (regulator-assigned risk weights) or Internal Ratings-Based (IRB) where banks estimate PD, LGD, EAD subject to floors.
- **Market risk**: Standardized or Internal Models Approach (FRTB introduces Expected Shortfall at 97.5% with liquidity horizons).
- **Operational risk**: Standardized Measurement Approach (SMA) replacing AMA — a function of Business Indicator and Internal Loss Multiplier.

Example: Vesstrom Commercial Bank has $8B in CET1, $140B RWA. CET1 ratio = 5.71%. Above the 4.5% minimum but below 4.5% + 2.5% buffer = 7.0%, so Vesstrom faces distribution restrictions (dividend/bonus limits).

```mermaid
flowchart TD
  A[RWA] --> B[Credit RWA]
  A --> C[Market RWA]
  A --> D[Op Risk RWA]
  B & C & D --> E[Total RWA]
  F[Capital] --> G[CET1 >= 4.5%]
  F --> H[Tier1 >= 6%]
  F --> I[Total >= 8%]
```

The 2023 Basel III finalization added the output floor: IRB-calculated RWA cannot be less than 72.5% of standardized-approach RWA, reducing internal-model benefit for low-risk portfolios.

What does Pillar 1 of the Basel framework require for minimum regulatory capital?

Master Part II with our FRM Course

Related Questions

Practice Questions