问题2:用创业板指数的收益率对投资者情绪指标回归,创业板的收益率单位%,投资情绪指标用主成分分析完用不用取%。
换手率(整体法) | 市盈率(历史TTM_整体法) | 年化收益率算术平均(最近100周) | 沪深300的涨跌幅% | 封闭基金折价率% |
创业板(含ST) | 创业板(含ST) | 创业板(含ST) |
楼主: conniewj
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[讨论交流] 主成分分析因子的单位 |
学科带头人 39%
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回帖推荐It is a rather subtle topic. As a statistical analysis method, PCA does NOT require all variables in the same unit. In some cases you just cannot. For example, the variables include interest rate, oil price and S&P500 index.
However, as xtang60 pointed out, there is an option to use either cor or covar matrix. Each option has pros and cons. There are lots of discussions and debates on which one ...
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