Are banks affected by their holdings of government debt?

This Working Paper sheds light on the link between sovereign and banking risk in the euro zone. It provides an empirical analysis of the impact o

Publishing date: 26 March 2012
Authors: Guntram B. Wolff

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The strong relation between sovereign and banking stress is frequently emphasised, especially since the start of the European sovereign debt crisis. This working paper sheds light on the determinants of the link. It studies the stock market performance and the holdings of government debt of the banks stress tested by the European Banking Authority in July and December 2011. A number of results stand out:

Banks’ holdings of the sovereign bonds of vulnerable countries generally decreased during the period December 2010 to September 2011.
The average stock market performance of each country’s banks was very uneven during 2011. The long-term refinancing operation (LTRO) had no material effect on banks’ stock market values.
Greek debt holdings had an effect on banks’ market values in the period July to October 2011 while after October this effect disappeared. Holdings of Italian and Irish debt had a material effect on banks’ market value in the period October to December 2011. Holdings of debt of other periphery countries, in particular Spain, were not an issue. The July PSI deal did not substantially affect the risk resulting from holdings of debt other than Greek debt.
The location of banks matters for their market value. This highlights the need to form a banking union in the euroarea.

About the authors

Guntram B. Wolff

Guntram Wolff is a Senior fellow at Bruegel. He is also a Professor of Public Policy and Economics at the Willy Brandt School of Public Policy. From 2022-2024, he was the Director and CEO of the German Council on Foreign Relations (DGAP) and from 2013-22 the director of Bruegel. Over his career, he has contributed to research on European political economy, climate policy, geoeconomics, macroeconomics and foreign affairs. His work was published in academic journals such as Nature, Science, Research Policy, Energy Policy, Climate Policy, Journal of European Public Policy, Journal of Banking and Finance. His co-authored book “The macroeconomics of decarbonization” is published in Cambridge University Press.

An experienced public adviser, he has been testifying twice a year since 2013 to the informal European finance ministers’ and central bank governors’ ECOFIN Council meeting on a large variety of topics. He also regularly testifies to the European Parliament, the Bundestag and speaks to corporate boards. In 2020, Business Insider ranked him one of the 28 most influential “power players” in Europe. From 2012-16, he was a member of the French prime minister’s Conseil d’Analyse Economique. In 2018, then IMF managing director Christine Lagarde appointed him to the external advisory group on surveillance to review the Fund’s priorities. In 2021, he was appointed member and co-director to the G20 High level independent panel on pandemic prevention, preparedness and response under the co-chairs Tharman Shanmugaratnam, Lawrence H. Summers and Ngozi Okonjo-Iweala. From 2013-22, he was an advisor to the Mastercard Centre for Inclusive Growth. He is a member of the Bulgarian Council of Economic Analysis, the European Council on Foreign Affairs and advisory board of Elcano.

Guntram joined Bruegel from the European Commission, where he worked on the macroeconomics of the euro area and the reform of euro area governance. Prior to joining the Commission, he worked in the research department at the Bundesbank, which he joined after completing his PhD in economics at the University of Bonn. He also worked as an external adviser to the International Monetary Fund. He is fluent in German, English, and French. His work is regularly published and cited in leading media.