#AI #Grok: Basel’s risk weighted bank capital requirements, or a leverage ratio, which generates more worthy wealthy?
I asked Grok
“Risk weighted bank capital requirements favoring public debt and residential mortgages over loans to small businesses and entrepreneurs, or the same requirement against all assets, a leverage ratio, which will generate a larger number of what could be described as more worthy wealthy?”
Grok answered:
The leverage ratio—applying the same capital requirement to all assets—will generate a larger number of what could be described as more worthy wealthy, compared to risk-weighted capital requirements that favor public debt and residential mortgages over loans to small businesses and entrepreneurs.
Understanding the Two Approaches
Bank capital requirements are designed to ensure financial stability by requiring banks to hold a certain amount of equity capital relative to their assets (like loans or investments). The two main approaches differ in how they assess risk:
Risk-Weighted Capital Requirements (RWA System): Capital needs are scaled based on the perceived risk of each asset. Low-risk assets, such as government bonds (often 0% risk weight) and residential mortgages (typically 35-50% risk weight), require little capital. Higher-risk assets, like loans to small businesses or entrepreneurs (often 100% or more risk weight), demand much more capital. This creates a strong incentive for banks to prioritize "safe" lending to minimize capital costs and maximize returns on equity (ROE). As a result, banks lend disproportionately to public debt (funding government spending) and mortgages (fueling housing markets), while avoiding or charging higher rates for small business loans due to the capital penalty.
Leverage Ratio: This is a simple, non-risk-based measure: total capital divided by total (unweighted) assets, often set at 3-5% or higher under frameworks like Basel III. All assets are treated equally, regardless of risk. There's no capital "discount" for safe assets, so banks can't game the system by loading up on low-risk items. Instead, to achieve competitive ROE, banks may shift toward higher-yield, riskier assets—like small business loans—that offer better interest rates to compensate for the equal capital treatment.
These differences have real-world economic implications, particularly for wealth creation.
"More worthy wealthy" here refers to individuals or families who build sustainable wealth through productive, innovative activities (e.g., entrepreneurs starting and scaling businesses that create jobs and economic value), rather than through asset inflation in housing or low-yield government financing.
Why the Leverage Ratio Favors More Worthy Wealth CreationThe RWA system distorts lending away from productive entrepreneurship toward less dynamic sectors, limiting the number of successful small business owners and innovators. In contrast, the leverage ratio removes these distortions, potentially increasing lending to high-potential but riskier ventures. Here's a breakdown:
Incentives for Lending Patterns:
Under RWAs, banks face a capital penalty for small business loans (e.g., a $100 loan to an SME might require $10 in capital at 100% risk weight, vs. $0 for government bonds or $3.50 for mortgages). This makes SME lending less attractive, reducing credit availability and stifling entrepreneurship. Studies show Basel III's RWA enhancements have raised the cost of SME lending by increasing banks' weighted capital needs, leading to tighter credit for small firms.
The leverage ratio eliminates risk-weight gaming. Since all assets require the same capital (e.g., 4% of $100 = $4 regardless of type), banks are incentivized to pursue higher-yield options like SME loans (which often carry 8-12% interest rates) over low-yield safe assets (e.g., 2-4% on mortgages or bonds). This "perverse incentive" for risk-taking—shifting portfolios toward volatile, high-return assets—can boost lending to entrepreneurs. Empirical evidence from U.S. banks post-2012 supplementary leverage ratio (SLR) implementation shows increased use of riskier collateral and higher risk-taking, as banks optimize for returns without RWA benefits.
Impact on Wealth Generation:
RWA System: Favors wealth concentration in real estate (via mortgage booms, inflating home prices for property owners) and public sector financing (benefiting governments and bondholders, often large institutions). This creates "unworthy" wealth through speculation or low-productivity growth, with fewer new entrepreneurs succeeding due to credit scarcity. For instance, higher RWAs under Basel III/IV have been linked to reduced SME financing, handicapping small businesses that drive innovation and job creation.
Leverage Ratio: Promotes broader wealth creation by enabling more credit to small businesses and startups, which historically generate the most dynamic economic value. Successful entrepreneurs (the "worthy wealthy") emerge from these ventures, building companies that scale, employ workers, and innovate. Research indicates leverage ratios act as a backstop to RWAs, encouraging balanced risk-taking without over-penalizing productive loans. While it may raise overall capital needs (potentially slowing some lending), it disproportionately benefits high-yield sectors like SMEs by leveling the playing field.
Evidence from Economic Studies and Implementation:
Analyses of Basel III show RWAs increase SME lending costs by 10-20 basis points on average, reducing loan volumes to small firms while boosting mortgage and sovereign exposures.
Leverage ratio introductions (e.g., in the EU and U.S.) have led to portfolio shifts toward riskier assets, with one study finding SLR prompted banks to favor high-return, volatile investments over safe ones like agency mortgage-backed securities.
Brookings Institution reviews emphasize that while RWAs tailor capital to risk (good for stability), they create biases against risky but productive lending; leverage ratios counter this by being simple and risk-neutral, though they require calibration to avoid excessive risk-shifting.
Aspect | Risk-Weighted Requirements | Leverage Ratio |
Treatment of Assets | Favors low-risk (gov debt: 0%, mortgages: 35-50%, SMEs: 100%+) | Equal treatment (all assets same capital charge) |
Incentive for SME/Entrepreneur Lending | Discourages (higher capital penalty reduces ROE) | Encourages (higher yields compensate for equal capital; promotes risk-taking for returns) |
Wealth Creation Outcome | More wealth in housing/gov financing (speculative, concentrated) | More entrepreneurial wealth (productive, distributed via business success) |
Potential Drawbacks | Gaming via low risk weights; undercapitalizes hidden risks | May increase overall risk-taking if not paired with RWAs; higher total capital needs |
Real-World Impact Example | Basel III raised SME costs, reduced small business loans | Post-2012 SLR: Banks shifted to riskier, higher-yield assets |
Caveats and Complementary Use
No single approach is perfect—regulators like the Basel Committee recommend using both (leverage as a "backstop" to RWAs) to balance stability and growth. Pure leverage might encourage excessive risk if banks chase yields recklessly, but in practice, it reduces the bias against entrepreneurs. If implemented standalone, the leverage ratio's equal treatment would likely produce more "worthy wealthy" by fostering a vibrant small business ecosystem, as seen in economies with simpler capital rules (e.g., some community banking models). For maximum effect, it should be set at levels (e.g., 5-8%) that maintain safety while unlocking productive lending.
I said: Thanks!
It said: You're welcome! If you have more questions about banking regulations, economics, or anything else, feel free to ask—I'm here to help.
Here is ChatGPT’s answer to exactly the same question