Detecting multiple breaks in financial market volatility dynamics
金融市场波动率动态中的多重结构突变检测AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确涉及资产收益条件方差的多重结构突变,并将高频数据波动率估计量纳入检验对象,支持这三个方向。
金融市场波动率动态中的多重结构突变检测AI 解读 ↓
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Abstract The paper evaluates the performance of several recently proposed tests for structural breaks in the conditional variance dynamics of asset returns. The tests apply to the class of ARCH and SV type processes as well as data‐driven volatility estimators using high‐frequency data. In addition to testing for the presence of breaks, the statistics identify the number and location of multiple breaks. We study the size and power of the new tests for detecting breaks in the conditional variance under various realistic univariate heteroscedastic models, change‐point hypotheses and sampling schemes. The paper concludes with an empirical analysis using data from the stock and FX markets for which we find multiple breaks associated with the Asian and Russian financial crises. These events resulted in changes in the dynamics of volatility of asset returns in the samples prior and post the breaks. Copyright © 2002 John Wiley & Sons, Ltd.