Time-Varying Systemic Risk: Evidence From a Dynamic Copula Model of CDS Spreads
时变系统性风险:来自 CDS 利差动态 Copula 模型的证据AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以企业联合困境概率衡量系统性风险,并研究危机前后的风险依赖变化,直接对应尾部与系统性风险方向。
时变系统性风险:来自 CDS 利差动态 Copula 模型的证据AI 解读 ↓
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This article proposes a new class of copula-based dynamic models for high-dimensional conditional distributions, facilitating the estimation of a wide variety of measures of systemic risk. Our proposed models draw on successful ideas from the literature on modeling high-dimensional covariance matrices and on recent work on models for general time-varying distributions. Our use of copula-based models enables the estimation of the joint model in stages, greatly reducing the computational burden. We use the proposed new models to study a collection of daily credit default swap (CDS) spreads on 100 U.S. firms over the period 2006 to 2012. We find that while the probability of distress for individual firms has greatly reduced since the financial crisis of 2008–2009, the joint probability of distress (a measure of systemic risk) is substantially higher now than in the precrisis period. Supplementary materials for this article are available online.