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arXiv 2201.08584econ.EM
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高维稀疏多变量随机波动率模型

High-Dimensional Sparse Multivariate Stochastic Volatility Models

Benjamin Poignard, Manabu Asai

摘要:

虽然多变量随机波动率模型通常产生更准确的预测相比,MGMCMC模型,他们的估计技术,如贝叶斯MCMC通常遭受灾难的维度。我们提出了一种快速有效的估计方法MSV的基础上惩罚OLS框架。将MSV模型看作是一个多变量状态空间模型,我们提出了一个两步惩罚过程。当参数个数发散时,我们给出了两步估计的渐近性质和第一步估计的预言性质。我们的方法的性能说明通过模拟和金融数据。

英文摘要:

Although multivariate stochastic volatility models usually produce more accurate forecasts compared to the MGARCH models, their estimation techniques such as Bayesian MCMC typically suffer from the curse of dimensionality. We propose a fast and efficient estimation approach for MSV based on a penalized OLS framework. Specifying the MSV model as a multivariate state space model, we carry out a two-step penalized procedure. We provide the asymptotic properties of the two-step estimator and the oracle property of the first-step estimator when the number of parameters diverges. The performances of our method are illustrated through simulations and financial data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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