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Credit Risk Analysis on Euro Government Bonds-Term Structures of Default Probabilities

机译:欧元国债信用风险分析-违约概率期限结构

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In this paper, we make a comprehensive credit risk analysis on government bonds (GBs) of Germany, France, Italy, Spain and Greece over the period 2007.4-2012.3, where interest rate (IR) differential, GB price differential, default probability (DP) and credit default swap (CDS) are considered. First, applying the GB-pricing model in Kariya (Quantitative methods for portfolio analysis: MTV approach. Springer, Berlin, 1993) to these GB prices, we derive the term structures of interest rates (TSIRs) and discuss on the Maastricht convergence condition for the IR-differentials among these states relative to the German TSIRs and make some observations on some divergent tendencies. The results are associated with the business cycles and budgetary condition of each state. In the second part, to substantiate this viewpoint, we first make credit risk price spread analysis on price differentials and derive the term structures of default probabilities (TSDPs) of the French, Italian, Spanish and Greek GBs relative to the German GBs, where the corporate bond (CB) model proposed in Kariya (Advances in modern statistical theory and applications: a Festschrift for Professor Morris L. Eaton. Institute of Mathematical Statistics, Beachwood, 2013) is used in the derivation. Then it is empirically shown that the TSDPs show a significant divergent movement at the end of 2011, affected by the Euro Crisis. In addition, the TSDPs of these GBs are empirically shown to be almost linear functions of the differences of the TSIRs, which enables us to state the Maastricht condition in terms of DP. Thirdly the effectiveness of our TSDPs is empirically verified by comparing them with the corresponding CDSs against US dollars.
机译:本文对德国,法国,意大利,西班牙和希腊在2007.4-2012.3期间的政府债券(GB)进行了全面的信用风险分析,其中利率(IR)差异,GB价格差异,违约概率(DP) )和信用违约掉期(CDS)。首先,将Kariya中的GB定价模型(用于投资组合分析的定量方法:MTV方法,Springer,柏林,1993年)应用于这些GB价格,我们得出了利率期限结构(TSIR),并讨论了马斯特里赫特收敛条件。这些国家之间相对于德国TSIR的IR差异,并对一些不同的趋势进行了观察。结果与每个州的经济周期和预算状况相关。在第二部分中,为了证实这一观点,我们首先对价格差异进行信用风险价格利差分析,并得出法国,意大利,西班牙和希腊国债相对于德国国债的违约概率(TSDP)的期限结构。在推导中使用了在Kariya中提出的公司债券(CB)模型(现代统计理论和应用的进展:莫里斯·L·伊顿教授的Festschrift,数学统计研究所,比奇伍德,2013年)。然后从经验上可以看出,受欧洲危机的影响,TSDP在2011年底出现了明显的分歧。此外,根据经验,这些GB的TSDP几乎是TSIR差异的线性函数,这使我们能够根据DP来陈述马斯特里赫特条件。第三,通过将它们与相应的CDS兑美元进行比较,从经验上验证了我们的TSDP的有效性。

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