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Diversification disasters
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DOI：10.1016/j.jfineco.2010.08.015.png)
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摘要
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The recent financial crisis has revealed significant externalities and systemic risks that arise from the interconnectedness of financial intermediaries' risk portfolios. We develop a model in which the negative externality arises because intermediaries' actions to diversify that are optimal for individual intermediaries may prove to be suboptimal for society. We show that the externality depends critically on the distributional properties of the risks. The optimal social outcome involves less risk-sharing, but also a lower probability for massive collapses of intermediaries. We derive the exact conditions under which risk-sharing restrictions create a socially preferable outcome. Our analysis has implications for regulation of financial institutions and risk management. (C) 2010 Elsevier B.V. All rights reserved.
Keyword:
Financial crisis
Financial institutions
Systemic risk
Limits of diversification
期刊
IF:
12
论文数:
3.8K
被引数:
5.5W
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引用论文
分享收藏RISK MANAGEMENT - COORDINATING CORPORATE-INVESTMENT AND FINANCING POLICIES.png)
JOURNAL OF FINANCE
OAAI
JOURNAL OF FINANCEIF9.5
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