Affine arbitrage-free yield net models with application to the euro debt crisis

Affine arbitrage-free yield net models with application to the euro debt crisis
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适用于欧元债务危机的仿射无套利收益率净模型

DOI:
10.1016/j.jeconom.2021.11.002
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发表时间:
2021-11
影响因子:
6.3
通讯作者:
Chen Zhang
Chen Zhang
中科院分区:
经济学2区
文献类型:
--
作者:
Zhiwu Hong;Linlin Niu;Chen Zhang

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我们开发了一类简约的仿射无套利收益率网模型,以求在不同期限和不同风险水平的发行人之间保持一致的债券定价。包含一条核心曲线和多条外围曲线的收益率网由三层因素组成:跨越所有曲线的基本因素,以及共同和个别的利差因素。在无套利假设下,我们证明了保证参数和潜在状态的联合辨识的风险中性过程的简约解。通过使用基于边际Metropolis-Hastings算法的贝叶斯估计方法和基于MCMC产出的规格检验,我们将该模型应用于德国、意大利、西班牙和希腊2009-2016年的周国债收益率。结果表明,所提取的共同信用风险是利差的水平因素,市场流动性风险是斜率因素。此外,这种净结构有助于重建希腊收益率曲线,即使在整个样本中只有10年期收益率可用。
We develop a parsimonious class of affine arbitrage-free yield net models for consistent bond pricing across maturities and issuers of different risk levels. Containing a core curve and multiple peripheral curves, the yield net is spanned by three layers of factors: base factors spanning all curves, and common and individual spread factors. Under the arbitrage-free assumption, we prove a parsimonious solution to the risk-neutral process that guarantees joint identification of parameters and latent states. By using a Bayesian estimation method with a marginal Metropolis–Hastings algorithm and specification tests based on MCMC output, we apply the model to weekly treasury yields of Germany, Italy, Spain, and Greece from 2009 to 2016. The results show that the extracted common credit risk is a level factor in spread, and market liquidity risk is a slope factor. Further, the net structure helps reconstruct the Greek yield curve even with only its 10-year yield available throughout the sample.
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