Category: Financial Stability

Climate and capital: some outstanding issues

Marco Bardoscia, Benjamin Guin and Misa Tanaka

There is a lively debate about whether and how capital regulations for banks and insurers should be adjusted in response to climate change. The Bank of England will host a conference later this year to discuss the points in favour of and against adjustments to the regulatory capital framework to take account of climate-related financial risks. The call for papers asks for research on appropriate capital tools to address these risks, eg whether risks point to microprudential tools which are firm specific or rather macroprudential system-wide ones. Moreover, it asks for research on an appropriate time horizon over which the risks should be considered and how scenarios and forward-looking data should be used. This post will review the existing literature and identify some key gaps.

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Uncertainty in financial crisis prediction: a Bayesian approach

Jack Page

Systemic financial crises occur infrequently, giving relatively few crisis observations to feed into the models that try to warn when a crisis is on the horizon. So how certain are these models? And can policymakers trust them when making vital decisions related to financial stability? In this blog, I build a Bayesian neural network to predict financial crises. I show that such a framework can effectively quantify the uncertainty inherent in prediction.

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Consumption effects of mortgage payment holidays during the Covid-19 pandemic

Alexandra Varadi and and Bruno Albuquerque

Mortgage payment holidays (PH) were introduced in March 2020 to help households who might have struggled to keep up with mortgage payments due to the pandemic. It allowed a suspension of mortgage principal and interest repayments for a maximum of six months, without affecting households’ credit risk scores. Given the novelty of the policy, we study in a new paper whether mortgage PH have supported household consumption during the pandemic, especially for those more financially vulnerable. Using transaction-level data, we find that temporary liquidity relief provided by PH allowed liquidity-constrained households to maintain higher annual consumption growth compared to those not eligible for the policy. We also find that PH led more financially stable households to increase their saving rates, not their consumption.

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Credit, crises and inequality

Jonathan Bridges, Georgina Green and Mark Joy

Any distributional effects on credit of macroprudential policies are only one part of the distributional story. Relatively little is known about how such policies affect the income distribution in the longer term via their role in preventing crises or mitigating their severity. Our paper helps to fill that gap in the literature by looking at the impact of past recessions and crises on inequality, and the amplifying roles of credit and capital within that. This helps to shed light on the distributional implications of not intervening – in the form of an amplified recession. We find that inequality rises following recessions and that rapid credit growth prior to recessions exacerbates that effect by around 40%.

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Bitesize: Efficiently green? What a simple metric can tell us about banks’ exposure to energy price shocks and the transition to a green economy

Benjamin Guin

UK residential buildings account for about 15% of greenhouse gas emissions. To facilitate the transition to a low-carbon economy, the UK government aims to see many homes upgraded to an energy (EPC) rating of C or higher by 2035. Mortgage lenders are key in transitioning to more energy-efficient housing by financing purchases. This transition can be informed by a simple metric – like the portfolio share of mortgages for energy-efficient properties (with a rating of C or higher) relative to all outstanding mortgages, a variant of the Green Asset Ratio. 

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Cost versus availability of loans: which matters more for mortgagors?

Alexandra Varadi

In early 2000s, mortgage debt increased rapidly relative to income.  A key driver of this was an expansion in credit supply that made credit cheaper and more widely available. But, it is largely unknown if it is the cost of borrowing or the availability of loans that matters more for mortgagors. I examine this question in a recent paper. I find that increasing loan availability, notably at high loan to value (LTV) or high loan to income (LTI) ratios, increases household borrowing and improves credit access. The cost of borrowing matters too. It is a strong determining factor for mortgagors closer to borrowing limits, and for middle-aged borrowers. And, reducing borrowing costs in tandem with higher loan availability strongly amplifies mortgage borrowing.

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An unintended consequence of holding dollar assets

Robert Czech, Shiyang Huang, Dong Lou and Tianyu Wang

During the March 2020 ‘dash for cash’, 10-year gilt yields increased by more than 50 basis points. This huge yield spike was accompanied by the heavy selling of gilts by mutual funds and insurance companies and pension funds (ICPFs). Focusing on the latter group, we argue in a recent paper that ICPFs’ abnormal trading behaviour in this period was partly a result of the dollar’s global dominance: ICPFs invest a large portion of their capital in dollar assets and hedge these exposures through foreign exchange (FX) derivatives. As the dollar appreciated in March 2020, ICPFs sold large quantities of gilts to meet margin calls on their short-dollar derivative positions, contributing to the yield spike in the gilt market.

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The costs and benefits of reducing the cyclicality of margin models

Nicholas Vause and David Murphy

Following a period of relative calm, many derivative users received large margin calls as financial market volatility spiked amidst the onset of the Covid-19 (Covid) global pandemic in March 2020. This reinvigorated the debate about dampening such ‘procyclicality’ of margin requirements. In a recent paper, we suggest a cost-benefit approach to mitigating margin procyclicality, whereby alternative mitigation strategies would be assessed not only in terms of the reduction in procyclicality they would deliver (the benefit), but also any increase in average margin requirements over the financial cycle (the cost). Strategies with the best trade-offs could then be put into practice. Our procyclicality metrics could also be used to report margin variability to derivative users, assisting them with their liquidity risk management.

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