Long-Term Memory in Stock Market Prices
股票市场价格的长期记忆AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究股票收益序列的长程与短程依赖,并推导检验的渐近抽样理论,分类依据是时间序列方法而非宏观应用。
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A test for long-term memory that is robust to short-range dependence is developed. It is a modification of the R/S statistic, and the relevant asymptotic sampling theory is derived via functional central limit theory. Contrary to previous findings, when applied to daily and monthly stock returns indexes over several time periods this test yields no evidence of long-range dependence once short-range dependence is accounted for. Monte Carlo experiments show that the modified R/S test has power against at least two specific models of long-term memory, suggesting that models with short-range dependence may adequately capture the behavior of historical stock returns. Copyright 1991 by The Econometric Society.