因子研究错误
由lifei521创建，最终由lifei521 被浏览 25 用户
问题
因子研究错误
https://bigquant.com/experimentshare/e8ee5408799e4950aedfcc494943d647
https://bigquant.com/experimentshare/e9f40d554ca14f8fa2f57a51219ab944
解答
参考代码如下：
https://bigquant.com/experimentshare/395ac4b98cdb427cbf94f51f4bcfe8d6
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