An Empirical Analysis of the Annual Report Effect of High Market Capitalization Companies in China

L. Xin, Huang Xi, S. Ganya
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Abstract

In this paper, we study the abnormal stock price returns of the top 10 stocks in the Chinese stock market in terms of total market capitalization before and after the release of their annual reports in the past 10 years, using the event study method implemented by the Event Study package of the Alpha Library under Python, using a market model to estimate normal returns. The results find that and most of the events have insider phenomenon.
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中国高市值公司年报效应的实证分析
本文采用Python下Alpha Library的event study包实现的事件研究方法,对过去10年中国股市总市值排名前10的股票在年报发布前后的异常股价收益进行了研究,使用市场模型估计正常收益。结果发现,绝大多数事件都存在内幕现象。
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