Risk Shifting in Financial Markets and Sustainable Finance

The contemporary literature on financial intermediation suggests that banks play an important role in the transition towards a sustainable economy. The research group ‘Risk Shifting in Financial Markets and Sustainable Finance’ contributes to this debate by studying lenders' risk shifting incentives, their choices in supporting sustainable business, and how sustainable finance and legal innovations affect firms and households.

First, we analyze how banks respond to climate transition risks. Specifically, we investigate whether banks manage these risks by offloading loans to environmentally harmful firms or by incorporating sustainability pricing provisions into loan contracts. Our ongoing research delves into the role of banking supervision in facilitating the transition to net-zero, specifically by assessing the impact of climate stress tests on banks' lending practices. We also examine how depositors, firms, and financial institutions manage various forms of biodiversity risk.

Second, we illustrate the choice between risk pricing and risk shifting through securitisation by financial institutions. From a household finance perspective, we discuss how mortgage fore­closure laws and mortgage pricing policies should be designed to mitigate moral hazard of lenders and borrowers. We also highlight the effect of zombie mortgage laws on banks and non-bank lenders, and the implications arising for housing markets.

Another line of research aims to establish evidence of how financial regulation contributes to securitisation booms, which are considered to be at the root of the recent boom and bust cycles in housing markets. Specifically, we shed light on how banking deregulation and financial develop­ment increase the probability of a bank operating an originate-to-distribute model in the lead up to the financial crisis that started in 2007. 

Finally, the research group investigates the role of financial institutions in supporting firms to mitigate risk from supply chain disruptions triggered by the Covid-19 pandemic.

Research Cluster
Financial Resilience and Regulation

Your contact

Professor Huyen Nguyen, PhD
Professor Huyen Nguyen, PhD
- Department Financial Markets
Send Message +49 345 7753-756 Personal page LinkedIn profile

Refereed Publications

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Too Connected to Fail? Inferring Network Ties from Price Co-movements

Jakob Bosma Michael Koetter Michael Wedow

in: Journal of Business and Economic Statistics, Vol. 37 (1), 2019

Abstract

We use extreme value theory methods to infer conventionally unobservable connections between financial institutions from joint extreme movements in credit default swap spreads and equity returns. Estimated pairwise co-crash probabilities identify significant connections among up to 186 financial institutions prior to the crisis of 2007/2008. Financial institutions that were very central prior to the crisis were more likely to be bailed out during the crisis or receive the status of systemically important institutions. This result remains intact also after controlling for indicators of too-big-to-fail concerns, systemic, systematic, and idiosyncratic risks. Both credit default swap (CDS)-based and equity-based connections are significant predictors of bailouts. Supplementary materials for this article are available online.

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Legal Insider Trading and Stock Market Liquidity

Hans Degryse Frank de Jong Jérémie Lefebvre

in: De Economist, Vol. 164 (1), 2016

Abstract

This paper assesses the impact of legal trades by corporate insiders on the liquidity of the firm’s stock. For this purpose, we analyze two liquidity measures and one information asymmetry measure. The analysis allows us to study as well the effect of a change in insider trading regulation, namely the implementation of the Market Abuse Directive (European Union Directive 2003/6/EC) on the Dutch stock market. The first set of results shows that, in accordance with theories of asymmetric information, the intensity of legal insider trading in a given company is positively related to the bid-ask spread and to the information asymmetry measure. We also find that the Market Abuse Directive did not reduce significantly this effect. Secondly, analyzing liquidity and information asymmetry around the days of legal insider trading, we find that small and large capitalization stocks see their bid-ask spread and the permanent price impact increase when insiders trade. For mid-cap stocks, only the permanent price impact increases. Finally, we could not detect a significant improvement of these results following the change in regulation.

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Working Papers

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Employment Responses to Increased Biodiversity Transition Risk

Duc Duy Nguyen Huyen Nguyen Trang Nguyen Vathunyoo Sila

in: IWH Discussion Papers, No. 20, 2025

Abstract

This paper examines how firms adjust the number and types of workers they hire in response to increased biodiversity transition risk. Using the adoption of the Key Biodiversity Areas Standard of 2016 as a source of variation that increases the risk of future land-use restrictions, we find that firms reduce job postings in affected areas and reallocate labor to less exposed regions. This effect is concentrated among firms that make negative impacts on biodiversity. Cuts are stronger among production roles, while hiring in green and adaptive occupations increases. The effect is not driven by changes in capital investment or workers’ labor supply decisions. Our findings contribute to the ongoing debate on the costs and benefits of biodiversity conservation policies and their implications for labor market outcomes.

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What’s the Melting Pot Worth? Multiculturalism and House Prices

Rachel Cho Hisham Farag Christoph Görtz Danny McGowan Huyen Nguyen Max Schröder

in: IWH Discussion Papers, No. 11, 2025

Abstract

Is there a multicultural neighborhood price premium? We exploit plausibly exogenous variation in British colonization patterns in Northern Ireland during the early 1600s which created neighborhoods of varying religious composition that persists until today. These religious groups are culturally distinct, but are observationally equivalent ethnically and socioeconomically. A standard deviation increase neighborhood-level multiculturalism raises house prices by 9.6%. Multiculturalism raises property prices by increasing asset liquidity and housing demand as a wider spectrum of society demand houses in these areas. The findings and mechanism contrast sharply with prior evidence showing negative relationships due to homophily, social networks, and identification challenges.

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Supply Chain Disruptions and Firm Outcomes

Michael Koetter Huyen Nguyen Sochima Uzonwanne

in: IWH Discussion Papers, No. 3, 2025

Abstract

This paper examines how firms’ exposure to supply chain disruptions (SCD) affects firm outcomes in the European Union (EU). Exploiting heterogeneous responses to workplace closures imposed by sourcing countries during the pandemic as a shock to SCD, we provide empirical evidence that firms in industries relying more heavily on foreign inputs experience a significant decline in sales compared to other firms. We document that external finance, particularly bank financing, plays a critical role in mitigating the effects of SCD. Furthermore, we highlight the unique importance of bank loans for small and solvent firms. Our findings also indicate that highly diversified firms and those sourcing inputs from less distant partners are less vulnerable to SCD.

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Environmental Incidents and Sustainability Pricing

Huyen Nguyen Sochima Uzonwanne

in: IWH Discussion Papers, No. 17, 2024

Abstract

We investigate whether lenders employ sustainability pricing provisions to manage borrowers’ environmental risk. Using unexpected negative environmental incidents of borrowers as exogenous shocks that reveal information on environmental risk, we find that lenders manage borrowers’ environmental risk by conventional tools such as imposing higher interest rates, utilizing financial and net worth covenants, showing reluctance to refinance, and demanding increased collateral. In contrast, the inclusion of sustainability pricing provisions in loan agreements for high environmental risk borrowers is reduced by 11 percentage points. Our study suggests that sustainability pricing provisions may not primarily serve as risk management tools but rather as instruments to attract demand from institutional investors and facilitate secondary market transactions.

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Regulating Zombie Mortgages

Jonathan Lee Duc Duy Nguyen Huyen Nguyen

in: IWH Discussion Papers, No. 16, 2024

Abstract

Using the adoption of Zombie Property Law (ZL) across several US states, we show that increased lender accountability in the foreclosure process affects mortgage lending decisions and standards. Difference-in-differences estimations using a state border design show that ZL incentivizes lenders to screen mortgage applications more carefully: they deny more applications and impose higher interest rates on originated loans, especially risky loans. In turn, these loans exhibit higher ex-post performance. ZL also affects lender behavior after borrowers become distressed, causing them to strategically keep delinquent mortgages alive. Our findings inform the debate on policy responses to foreclosure crises.

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