英文标题:
《Quantification of systemic risk from overlapping portfolios in the
financial system》
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作者:
Sebastian Poledna, Seraf\\\'in Mart\\\'inez-Jaramillo, Fabio Caccioli, and
Stefan Thurner
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最新提交年份:
2018
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英文摘要:
Financial markets are exposed to systemic risk, the risk that a substantial fraction of the system ceases to function and collapses. Systemic risk can propagate through different mechanisms and channels of contagion. One important form of financial contagion arises from indirect interconnections between financial institutions mediated by financial markets. This indirect interconnection occurs when financial institutions invest in common assets and is referred to as overlapping portfolios. In this work we quantify systemic risk from indirect interconnections between financial institutions. Having complete information of security holdings of major Mexican financial intermediaries and the ability to uniquely identify securities in their portfolios, allows us to represent the Mexican financial system as a bipartite network of securities and financial institutions. This makes it possible to quantify systemic risk arising from overlapping portfolios. We show that focusing only on direct exposures underestimates total systemic risk levels by up to 50%. By representing the financial system as a multi-layer network of direct exposures (default contagion) and indirect exposures (overlapping portfolios) we estimate the mutual influence of different channels of contagion. The method presented here is the first objective data-driven quantification of systemic risk on national scales that includes overlapping portfolios.
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中文摘要:
金融市场面临着系统性风险,即系统中相当一部分停止运行并崩溃的风险。系统性风险可以通过不同的传染机制和渠道传播。金融传染的一种重要形式是由金融市场调节的金融机构之间的间接互联。当金融机构投资于共同资产时,这种间接的相互联系就会发生,被称为重叠投资组合。在这项工作中,我们量化了金融机构之间间接互联的系统性风险。拥有墨西哥主要金融中介机构所持证券的完整信息以及在其投资组合中唯一识别证券的能力,使我们能够将墨西哥金融系统作为证券和金融机构的双边网络来代表。这使得量化重叠投资组合产生的系统性风险成为可能。我们发现,只关注直接风险会低估系统性风险水平达50%。通过将金融系统表示为直接风险敞口(违约传染)和间接风险敞口(重叠投资组合)的多层网络,我们估计了不同传染渠道的相互影响。这里介绍的方法是第一个在国家范围内对系统性风险进行客观的数据驱动量化,包括重叠的投资组合。
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分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Risk Management 风险管理
分类描述:Measurement and management of financial risks in trading, banking, insurance, corporate and other applications
衡量和管理贸易、银行、保险、企业和其他应用中的金融风险
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