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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Staying afloat: the impact of flooding on UK firms

Benjamin Crampton, Rupert-Hu Gilman and Rebecca Mari.

With climate change set to increase the frequency and intensity of flooding in the UK, it is important to deepen our understanding of the potential microeconomic impacts that may propagate into the macroeconomy. We integrate firm-level corporate records, with Ordnance Survey business-premise address information and publicly available flood maps to investigate two questions. First, what characteristics of firms are associated to the historical exposure and current risk of flooding; and second, what is the impact of flood events on corporate outcomes. We find significant sectoral, spatial and structural heterogeneity among firms in their risk and exposure to flooding. Larger firms are more likely to locate in flood zones, while small and medium-sized enterprises (SMEs) and natural-resource-related industries have historically been impacted most heavily.

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The heterogenous effects of carbon pricing: macro and micro evidence

Ambrogio Cesa-Bianchi, Alex Haberis, Federico Di Pace and Brendan Berthold

To achieve the Paris Agreement objectives, governments around the world are introducing a range of climate change mitigation policies. Cap-and-trade schemes, such as the EU Emissions Trading System (EU ETS), which set limits on the emissions of greenhouse gases and allow their price to be determined by market forces, are an important part of the policy mix. In this post, we discuss the findings of our recent research into the impact of changes in carbon prices in the EU ETS on inflation and output, focusing on how the emissions intensity of output – the quantity of CO_² emissions per unit of GDP – affects the response. Understanding these economic impacts is important for the Bank’s core objectives for monetary and financial stability.

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Some implications of climate policy for monetary policy

Francesca Diluiso, Boromeus Wanengkirtyo and Jenny Chan.

This post examines key aspects of climate mitigation policies that could matter for monetary policy, using insights from structural climate macroeconomic models (Environmental Dynamic Stochastic General Equilibrium). Three main findings emerge: first, mitigation policies – like carbon pricing – can be a direct source of shocks, creating potential trade-offs for monetary policy (Carney (2017)). Second, the degree to which these policies are anticipated affects their macroeconomic impacts. Third, different climate policies may alter the transmission of conventional business-cycle shocks, therefore affecting the calibration of optimal monetary policy. We focus on the 3–5 year horizon, abstracting from longer-run considerations and changing trends such as interactions with the zero lower bound, the natural interest rate, or transitional effects on productivity and output.

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Climate and monetary policy series

Boromeus Wanengkirtyo, Francesca Diluiso, Rebecca Mari, Jenny Chan, Ambrogio Cesa-Bianchi and Alex Haberis.

Climate change is becoming increasingly important for monetary policy as the world transitions into greener economies and climate change’s physical impacts become more prominent. This is complementary, but distinct to, examining how climate change affects financial stability risks (Carney (2015)). This series of posts highlights how climate change can affect key economic variables such as output and inflation, and thereby the conduct of monetary policy. Climate change and climate policies represent another set of economic shocks and structural changes to monitor, so that monetary policy can meet its objectives.

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Using causal inference for explainability enhancement in the financial sector

Rhea Mirchandani and Steve Blaxland

Supervisors are responsible for ensuring the safety and soundness of firms and avoiding their disorderly failure which has systemic consequences, while managing increasingly voluminous data submitted by them. To achieve this, they analyse metrics including capital, liquidity, and other risk exposures for these organisations. Sudden peaks or troughs in these metrics may indicate underlying issues or reflect erroneous reporting. Supervisors investigate these anomalies to ascertain their root causes and determine an appropriate course of action. The advent of artificial intelligence techniques, including causal inference, could serve as an evolved approach to enhancing explainability and conducting root cause analyses. In this article, we explore a graphical approach to causal inference for enhancing the explainability of key measures in the financial sector.

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With the arrival of stablecoins, is it time to pay farewell to traditional payment rails?

Aly Soliman

Stablecoins have emerged as an innovative form of money in the financial landscape. While they represent a small fraction of the global financial system, stablecoins have grown by US$30 billion in the last few months (as reported on DefiLlama). The potential effect of stablecoins on the payment industry could be substantial and merits attention.

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Nonbank lenders as global shock absorbers

David Elliott, Ralf Meisenzahl and José-Luis Peydró

Capital flows and credit growth are strongly correlated across countries. Macroeconomic evidence suggests that this ‘global financial cycle’ is largely driven by US monetary policy: expansionary policy by the Federal Reserve drives increases in lending globally, while contractionary Fed policy leads to a tightening of global financial conditions. Existing academic literature emphasises the role of banks in propagating these US monetary policy spillovers. But in recent decades, nonbank financial intermediaries have grown in importance. In a recent paper, we investigate the impact of US monetary policy on international dollar lending by nonbanks relative to banks, and show that nonbank lenders play an important role in absorbing US monetary policy shocks.

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