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# 金股组合增强——分析师推荐成功率因子 | ||
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## 结论 | ||
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- 根据分析师金股推荐成功概率分布,构建金股增强组合。组合年化收益率 **25.73%**,夏普比 **0.979**,卡玛比 1.02 | ||
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## 逻辑 | ||
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使用Beta分布定量记录分析师金股推荐历史。假设,对于分析师的真实选股能力,没有先验知识。因此,每个分析师初始的Beta分布中,α = β = 1,此情况下,分析师推荐成功率在[0,1]上均匀分布。当分析师推荐金股成功时,即推荐月份的股票涨幅>0时,参数𝛼更新为𝛼 + 1。反之,当推荐失败时,参数𝛽更新为𝛽 + 1。 | ||
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Beta分布概率密度函数: | ||
$$ | ||
f(x;\alpha,\beta)=\frac{x^{\alpha-1}(1-x)^{\beta-1}}{\int_{0}^{1}u^{\alpha-1}(1-u)^{\beta-1}du} | ||
$$ | ||
Beta 分布的期望: | ||
$$ | ||
\mu=E(x)=\frac{\alpha}{\alpha+\beta} | ||
$$ | ||
通过上式计算分析师推荐成功概率选出高概率分析师推荐的股票构建组合 | ||
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## 回测结果 | ||
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2020年至今回测结果如下 | ||
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 | ||
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每月持仓数量在20-35只左右(如下图) | ||
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 | ||
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每月收益情况 | ||
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 | ||
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历史前十大持仓 | ||
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 | ||
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持仓收益前十 | ||
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 | ||
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## 推荐成功率分析师TOP10 | ||
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 | ||
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9月所推股票(**部分不是全部**) | ||
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 |