今天分享一篇最近看过的文章,
学术论文:为什么股票基本面因子投资不能用量化-香港股票的异常收益发生在财报惊喜公布之前而不是之后
The Rise and Fall of Stock Fundamental Analysis
Changyang Xu (Charlie)
Jan 2021
文章的全文我就不贴了,就放关键结论吧。
Time series comparison between 0114 (BMG4410A1062) and 0869 (BMG7147S1008) is depicted in the following screenshot. This is the utmost important result in this entire study. According to the highlighted rows, returns are realized previous to companies reporting high fscore financial statements, rather than afterwards. I think there are two main drivers for the unprofitable holistic result in section 5.4 of this paper according to longing high fscore and shorting low fscore companies:
Good financial statements are the result rather than the cause of good company performance. In the digital age, good news is always rewarded quickly as markets become more and more efficient.
Especially for the low pb, small, low liquidity, and low analyst coverage stocks, there would be more professional, and less speculative traders. This leads to more likelihood of insider trading without immediately publication of important news.
以下是机翻:
良好的财务报表是公司良好业绩的结果,而不是原因。在数字时代,随着市场变得越来越高效,好消息总是能很快得到回报。特别是对于低pb、规模小、流动性低、分析师覆盖率低的股票,会有更多的专业人士,较少的投机交易者。这导致内幕交易的可能性更大,而不会立即公布重要消息。
换我自己理解的人话:
现在信息获取很方便,像以前打消息差兑现预期很难的啦。现在只有有点机会马上会被捕捉然后兑现。要不就是有内幕不会放出来的,捞一把就跑散户就吃尾气吧。
ps:想交流的肥哥进群啊啊啊啊啊啊啊啊(>д<),发帖真的互动少