Sheila Bair: The danger of allowing banks to artificially boost capital ratios

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Yahoo Finance’s Brian Cheung contributed data to this article.

“Never let a good crisis go to waste,” Rahm Emmanuel famously said in 2009. As President Obama’s Chief of Staff, he was speaking of the opportunity to achieve meaningful financial reforms in the aftermath of the Great Financial Crisis.

Ironically, big bank lobbyists are now using the Covid-19 crisis to undo those very reforms, cynically claiming deregulation will help banks support the real economy. Their primary target is the leverage ratio, a key measure of financial stability which big banks have long despised because it places hard and fast constraints on their ability to use unstable leverage to generate high returns. Weakening the leverage ratio will reduce the capital resiliency of the banking system, while giving banks incentives to actually reduce lending to artificially boost their capital ratios.

It is generally recognized that a main cause of the 2008-2009 financial crisis was excessive reliance on debt, or “leverage,” by large financial institutions. Central to post-GFC reforms was a strengthening of rules that require banks to fund themselves with a minimum amount of equity capital. There are two sets of requirements: “risk-based” rules which set minimum capital based on the perceived riskiness of a bank’s assets and “leverage ratios,” which do not allow such adjustments. A key disadvantage of risk based requirements is that they are subjective. They failed spectacularly prior to the GFC, when US and European regulators wrongly assumed mortgages and sovereign debt were low risk. The disadvantage of leverage ratios is that they are not risk-adjusted, requiring the same amount of capital against a US Treasury security (which we hope is safe) as a loan to Boeing. Each has strengths and weaknesses, which is why regulators use both.

Gaming the supplementary leverage ratio

The whole idea behind leverage ratios is that they are not risk-adjusted. They apply to all assets, including presumably safe ones, which is one of the reasons why they are set significantly lower than risk-based requirements. For the largest banking organizations, the main leverage constraint (called the Enhanced Supplementary Leverage Ratio or ESLR) is set at a minimum of 5%, but their risk-based ratios are roughly double that. Leverage ratios (calculated for the largest banks as Tier 1 capital divided by total leverage exposure) set rails around risk-based ratios, and banks’ ability to inflate them simply by manipulating the denominator. A bank can significantly increase its risk-based ratios by changing its asset mix, reducing its exposure to assets treated as high-risk under the rules, and then moving to assets treated as low-risk. Indeed, the largest banks typically risk-weight their assets at less than half of total assets. But the denominator of the leverage ratio cannot be so gamed.