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投资者情绪累积效应与股票价格波动 被引量:2
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作者 胡昌生 夏郭效 《统计与决策》 CSSCI 北大核心 2023年第5期152-157,共6页
投资者情绪与股票价格波动是行为金融领域的前沿问题。文章选取A股上市公司2011—2020年交易数据,构造一个全新的日频情绪指标,并基于该指标研究短期内投资者情绪的累积变化对股票收益的影响。结果表明:投资者情绪具有累积效应,该效应... 投资者情绪与股票价格波动是行为金融领域的前沿问题。文章选取A股上市公司2011—2020年交易数据,构造一个全新的日频情绪指标,并基于该指标研究短期内投资者情绪的累积变化对股票收益的影响。结果表明:投资者情绪具有累积效应,该效应最初带来显著的正收益,但会在投资者情绪累积到一定水平后,引致较大的价格修正,这对难以套利的股票影响更为明显;高、低情绪的累积效应具有显著的非对称性,在持续的高情绪累积下,市场中的资金会涌入波动水平低、流动性好的资产;而在持续的低情绪累积下,资金会选择投机性更强的资产。 展开更多
关键词 投资者情绪 股票价格波动 累积效应 非对称性
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Spillovers among China’s precious and industrial metals markets:Evidence from higher moments and jumps
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作者 Cai YANG Xiao-jie LEI Bai-sheng SHI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第4期1362-1384,共23页
This study reveals the time-varying spillover effects of higher moments(realized volatility,realized skewness and realized kurtosis)and jumps between China’s precious metals and industrial metals markets.Using 5-min ... This study reveals the time-varying spillover effects of higher moments(realized volatility,realized skewness and realized kurtosis)and jumps between China’s precious metals and industrial metals markets.Using 5-min high-frequency data from May 10,2012 to October 21,2021,the dynamic effects of spillovers are uncovered using the time-frequency domain spillover index framework.The results show that the system connectedness weakens as the moment order gets higher whereas the total jumps connectedness is the smallest,and the spillovers of all estimators are more evident in the short term.The overall information spillovers are time-varying and influenced by major market events.Specifically,for realized volatility,copper is the largest net transmitter and silver is always a net transmitter,while zinc is the largest net receiver.For realized skewness,copper is the largest net transmitter and silver is always a net transmitter,while lead is the largest net receiver.For realized kurtosis and jumps,copper is the largest net transmitter,while aluminum is the largest net receiver.Overall,copper and silver play dominant roles in China’s precious and industrial metals markets system. 展开更多
关键词 SPILLOVERS precious metals industrial metals time-frequency domain analysis higher moments JUMPS
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