Category: Financial Stability

GIV us some credit: estimating the macroeconomic effects of credit supply shocks

Sam Christie and Aniruddha Rajan

Sudden contractions in credit supply can trigger and amplify recessions – a reality made painfully clear by the 2008 global financial crisis (GFC). However, quantifying these real economic effects is challenging. In this post, we demonstrate a novel way to do so using Granular Instrumental Variables (GIV), focusing on the UK mortgage market. The core idea is that we can exploit the market’s concentration to build up exogenous fluctuations in aggregate credit supply from idiosyncratic lender-specific shocks. Using our GIV, we find evidence that contractionary mortgage supply shocks can have quantitatively significant effects on the macroeconomy, causing persistent decreases in output, consumption, and investment, alongside increases in unemployment.

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Why do government bond yields drift when news is on its way?

Danny Walker, Dong Lou, Gabor Pinter and Semih Üslü

Government bond yields tend to drift higher in the days before monetary policy or data news in the UK. Over the past two decades this tendency – which we label ‘pre-news drift’ – has pushed up on yields by 2 percentage points in total over that period. The drift concentrates in pre-news periods that coincide with the issuance of UK government bonds, which is more common than it used to be. Our analysis shows that dealers and hedge funds are reluctant to buy bonds when news is on its way, which pushes up yields. Pre-news drift could affect the signal monetary policy makers draw from market rates and it could have implications for the optimal timing of bond issuance. There are further details in an associated working paper.

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Launch of the 2025–28 Bank of England Agenda for Research

Misa Tanaka

Today the Bank published the 2025–28 ‘Bank of England Agenda for Research’ setting out the key areas for new research over the coming years and a set of priority topics for 2025.

Misa Tanaka works in the Bank’s Research Hub and is the Bank’s Head of Research.

If you want to get in touch, please email us at bankunderground@bankofengland.co.uk or leave a comment below.

Comments will only appear once approved by a moderator, and are only published where a full name is supplied. Bank Underground is a blog for Bank of England staff to share views that challenge – or support – prevailing policy orthodoxies. The views expressed here are those of the authors, and are not necessarily those of the Bank of England, or its policy committees.

Stable gilts and stable prices: assessing the Bank of England’s response to the LDI crisis

Nicolò Bandera and Jacob Stevens

How should the central bank conduct asset purchases to restore market functioning without causing higher inflation? The Bank of England was faced with this question during the 2022 gilt crisis, when it undertook gilt purchases on financial stability grounds while inflation was above 10%. These financial stability asset purchases could have counteracted the monetary policy stance by easing financial conditions at a time when monetary policy was tightening them. Did a trade-off between price and financial stability arise? In our Staff Working Paper, we find the asset purchases stabilised gilt markets without materially affecting the monetary policy stance. This was only possible because the intervention was temporary; highly persistent asset purchases would have created tension between price and financial stability.

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Zero-day options and financial market vulnerability

Bowen Xiao

Zero-day options have exploded in popularity in recent years, accounting for approximately half of S&P 500’s total options volume, a ten-fold increase from just 5% in 2016. Their flexibility, low premia and underlying leverage appeal to all market participants ranging from conservative investors hedging against intraday market volatility to aggressive traders speculating for quick profit generation. The rapid rise of zero-day options and the memory of a market stress episode known as ‘Volmageddon‘ raises concerns that zero-day options could lead to a similar event. There are differing views among participants on the perceived risks of zero-day options. This post aims to provide a balanced overview.

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Adaptation is to mitigation what Robin is to Batman

Jenny Clark and Theresa Löber

The UK’s climate continues to change, getting wetter and warmer, with extremes becoming ever more pronounced. Even if we limit global warming to 1.5°C above pre-industrial levels, experts warn that we’ll see the number and severity of extreme weather events increase further. Without adaptation, we will see more property, infrastructure and agriculture damaged or destroyed, with devastating consequences to households, communities and businesses – as well as increasing risks to economic and financial stability. To date there has been relatively more focus on mitigation and the transition to net zero than on adaptation and addressing physical risk, across both government and the private sector. Adaptation is mitigation’s sidekick, we need them to consistently work together to achieve better outcomes. Much like Batman and Robin.

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Weathering the storm: the economic impact of floods and the role of adaptation

Rebecca Mari and Matteo Ficarra.

Floods are the most costly natural disaster in Europe. In the UK, they account for around GBP1.4 billion in annual losses. Yet, evidence on the macroeconomic implications is inconclusive. GDP often shows a puzzling delayed response, and prices can be pushed in opposite directions. Using a novel county level data set for England for the years 1998–2021, we estimate the impact of flooding on output and inflation at the sector level. Sectors react heterogeneously to floods, which explains well aggregate evidence. Prices respond in sectors related to both headline and core inflation, which has crucial implications for monetary policy. We further show that investing in flood defences mitigates the economic burden of floods by strongly reducing the risk of flooding.

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30+ year mortgages – are these the new norm? What does this mean for financial stability?

James Waddell and Meghna Shrestha

An increasing number of households in the UK are opting for longer-term mortgages, with the share of borrowers taking out new mortgages with terms 30 years or longer tripling since 2005. But who are these households, why have they done so, and what could this imply for financial stability?

This blog presents some analysis to answer these questions, and focuses on three potential risk channels which could affect financial stability. These can be broadly classified into: (i) lending into old age; (ii) increased leverage; and (iii) higher debt persistence. We judge the risks associated with longer-term mortgages are limited and are mitigated by existing Financial Policy Committee (FPC) and Financial Conduct Authority (FCA) policies, which limit risky lending both at the borrower level and in aggregate.

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Long-term fixed-rate mortgages through an international lens: could they lead to higher home ownership?

Gabija Zemaityte

The Tony Blair Institute for Global Change, among others, has argued that long-term fixed-rate mortgages (LTFRMs) could increase home ownership in the UK. The share of mortgages with longer fixes increased in the UK and internationally over the last decade. Persistently low interest rates over that period have supported demand for longer-fix products, including five-year fixes. But differences in mortgage markets structures across countries are the main drivers of the prevalence of LTFRMs – here defined as mortgages with interest rates fixed for 10 years or more. In this post, I review the international experience, and argue that while LTFRMs can guard against interest rate risk, they do not necessarily increase home ownership. Indeed, some economies with high shares of LTFRMs exhibit lower home ownership.

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