Exploiting tail shape biases to discriminate between stable and student t alternatives
利用尾形估计偏差区分稳定分布与 Student t 分布AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要研究金融资产收益的厚尾、尾形估计与尾部分布判别,直接对应金融风险中的尾部方向。
反馈分类问题利用尾形估计偏差区分稳定分布与 Student t 分布AI 解读 ↓
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Summary The nonnormal stable laws and Student t distributions are used to model the unconditional distribution of financial asset returns, as both models display heavy tails. The relevance of the two models is subject to debate because empirical estimates of the tail shape conditional on either model give conflicting signals. This stems from opposing bias terms. We exploit the biases to discriminate between the two distributions. A sign estimator for the second‐order scale parameter strengthens our results. Tail estimates based on asset return data match the bias induced by finite‐variance unconditional Student t data and the generalized autoregressive conditional heteroscedasticity process.