Welcome to the final lesson of our module on specialised accounts. In our previous session, you learned how to calculate and interpret a bank's capital adequacy ratios, focusing on the practical application of the formulas for CET1, Tier 1, and Total Capital. We saw how these numbers provide a snapshot of a bank's ability to absorb losses.
Today, we will zoom out from the calculations to understand the regulatory philosophy that underpins them. This lesson addresses the "why" behind the numbers, exploring the key principles that regulators have developed to govern bank accounts and ensure financial stability. We will delve into the history and structure of the Basel Accords, the international framework that sets the rules of the game for banks worldwide. By the end of this lesson, you will be able to describe the key regulatory principles that give context and meaning to the ratios you've already mastered.
The Genesis of Global Banking Regulation
Before the intricate rules and ratios existed, global finance was a far more precarious system. The need for international cooperation became starkly clear in 1974 with the collapse of a German bank, Bankhaus Herstatt. This event sent shockwaves through the financial system, freezing international payments and revealing the dangers of a world where banking rules were purely local.
This crisis was the catalyst for the creation of the Basel Committee on Banking Supervision (BCBS), a group of central bankers who gathered to create a common framework for financial safety. The following video provides an excellent narrative of this history, explaining how a single bank failure led to the development of the most powerful financial laws on Earth.
The Basel Rules: How Banks Quietly Rewrote Global Finance
The video "The Basel Rules: How Banks Quietly Rewrote Global Finance" tells the story of how international banking regulation came to be.
Watch the first two sections of this video. The first part, "The Herstatt Risk," sets the scene by describing the 1974 crisis that sparked the creation of the Basel Committee. The second part, "Basel I," introduces the first international standard and the original 8% capital rule that became the foundation for everything that followed.
The Three Pillars of the Basel Framework
As you just saw, the first Basel Accord (Basel I) established a simple, powerful rule. However, as finance grew more complex, regulators realised that a single rule was not enough. The successor, Basel II, was built on a more holistic framework known as the Three Pillars. This structure remains central to banking regulation today.
The article below provides a concise overview of these pillars. While we covered the calculations (Pillar 1) in the last lesson, understanding all three is essential to grasp the complete regulatory picture.
Capital Adequacy is a Balance Sheet Ratio
This article from Bionic Turtle clearly outlines the three-pillar structure of the Basel Accords.
Please read the section titled "Basel also includes two other pillars." This short text describes the role of each pillar.
To summarise, the three pillars are:
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Pillar 1: Minimum Capital Requirements. This is the quantitative pillar that we focused on in the last lesson. It sets out the minimum capital ratios (CET1, Tier 1, Total Capital) that banks must maintain against their risk-weighted assets (RWA). It covers credit risk, market risk, and operational risk.
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Pillar 2: Supervisory Review Process. This pillar is qualitative. It acknowledges that the Pillar 1 rules are a minimum, not a complete solution. It requires banks to have their own internal processes for assessing risk and capital adequacy (known as the ICAAP - Internal Capital Adequacy Assessment Process). National regulators then review these internal processes to ensure they are robust and may require a bank to hold more capital than the Pillar 1 minimum if they identify additional risks.
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Pillar 3: Market Discipline. This pillar focuses on transparency. It requires banks to disclose extensive information about their risk exposures, capital levels, and risk management processes. The idea is that a well-informed market—including investors, creditors, and depositors—will exert its own form of discipline on banks, rewarding prudent ones and penalising riskier ones.
The Evolution: From Basel I to Basel IV
The regulatory framework is not static. It has evolved significantly in response to financial innovation and, most notably, financial crises.
The video you watched earlier continues with a compelling overview of this evolution. It explains how the simple rules of Basel I gave way to the complex models of Basel II, how those models failed during the 2008 global financial crisis, and how Basel III was designed to fix the system.
The Basel Rules: How Banks Quietly Rewrote Global Finance
This video continues its historical journey, detailing the critical shifts in regulatory thinking.
Please watch the following three segments: Basel II and the 2008 Crisis: This section explains the move towards allowing banks to use their own internal risk models and how this contributed to the underestimation of risk before the 2008 crash. The Basel III Reforms: Here, you'll learn about the post-crisis response, which included stricter capital definitions and new safety ratios for liquidity and leverage. Basel IV and the Output Floor: This final segment explains the most recent refinement, designed to put a limit on how much banks can use their internal models to reduce capital requirements.
Your background as a statistician makes the story of Basel II and III particularly relevant. The shift to internal models in Basel II was a major vote of confidence in banks' statistical capabilities. However, the 2008 crisis proved that when incentives are misaligned, models can be manipulated to produce dangerously optimistic results. Basel III and "IV" represent the regulators' response: re-imposing stronger, simpler backstops (like the leverage ratio and the output floor) to constrain the output of those complex internal models.
Standardised vs. Internal Model Approaches
A key principle within Pillar 1 is the choice between two methods for calculating risk-weighted assets. This choice gets to the heart of the trade-off between simplicity/comparability and risk-sensitivity.
- The Standardised Approach: Regulators provide a list of risk weights for different asset classes (e.g., 0% for government bonds, 50% for mortgages, 100% for corporate loans). This approach is simple and makes it easy to compare banks, but it is not very granular.
- The Internal Ratings-Based (IRB) Approach: Sophisticated banks can use their own internal statistical models to estimate the risk of their assets and calculate their capital requirements. This is also called the "economic approach" or Pillar 2 approach. It is more risk-sensitive and tailored to the bank's unique portfolio but is complex, less transparent, and, as we've seen, can be gamed.
The following video explains this crucial distinction.
The video "Basel 3 Explained" clearly contrasts the two main approaches for calculating risk and capital.
Watch the segments on the Pillar 1 approach and the Pillar 2 approach. The presenter walks through how each approach would treat the same set of assets, highlighting the difference between using regulator-prescribed weights and bank-internal models.
IFRS 9: A Forward-Looking Approach to Losses
Another key regulatory principle that has changed significantly is how banks account for potential loan losses. Before the introduction of IFRS 9, banks used an "incurred loss" model, meaning they only recognised a loss when there was objective evidence of a default (e.g., a missed payment).
IFRS 9 introduced a more forward-looking Expected Credit Loss (ECL) model. Given your background in probability, you will find this conceptually familiar. Banks must now estimate and provide for losses they expect to happen in the future, not just those that have already occurred. This is done using a three-stage model.
- Stage 1: On origination, all financial assets are in Stage 1. The bank recognises a provision equal to the 12-month expected credit losses.
- Stage 2: If the credit risk of an asset has increased significantly since it was created, it moves to Stage 2. The bank must now recognise a provision for lifetime expected credit losses.
- Stage 3: If an asset becomes credit-impaired (i.e., there is objective evidence of a default), it moves to Stage 3. The bank continues to provide for lifetime expected credit losses, but interest revenue is calculated differently.
This shift from an incurred to an expected model is a fundamental principle designed to make banks recognise losses earlier, increasing their resilience in a downturn.
Conclusion
In this lesson, we have moved beyond the mechanics of capital ratios to explore the regulatory architecture that governs modern banking. We've seen that these principles are not arbitrary but are the result of a long, and often painful, process of learning from financial crises.
Key Takeaways:
- The Basel Accords (I, II, and III/IV) form the cornerstone of international banking regulation, created to ensure financial stability.
- The framework is built on Three Pillars: Minimum Capital Requirements (Pillar 1), Supervisory Review (Pillar 2), and Market Discipline (Pillar 3).
- Regulation has evolved from simple rules (Basel I) to complex internal models (Basel II) and back to a hybrid system with stronger backstops (Basel III) in response to the 2008 crisis.
- A key principle is the move towards more forward-looking provisioning for loan losses under the IFRS 9 Expected Credit Loss (ECL) model.
- Beyond capital, regulators also mandate liquidity rules (LCR and NSFR) and a simple Leverage Ratio to provide a complete picture of a bank's resilience.
This concludes our module on Specialised and Group Accounts. You now have a solid understanding of how to prepare consolidated accounts and how to analyse the unique financial statements of insurers and banks.
Our next module, Interpreting Financial Performance and Position, will broaden our scope. We will take the ratio analysis skills you've developed and apply them to a wide range of companies, learning how to dissect financial statements to evaluate a firm's profitability, liquidity, gearing, and efficiency from the perspective of an investor or analyst.