In part, because investors have learned to distinguish between the market return, dubbed beta, and managers' outperformance, known as alpha.

部分原因是因为投资者们开始学会在市场收益率，复制beta, alpha即经理人的突出表现之间进行分辨。

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Based on CAPM, the authors obtained the expected return rate of entrepreneurs, the beta coefficient and risk premium of enterprises.

基于经典的资本资产定价(CAPM)理论，得到了企业家的期望收益率、企业的贝塔系数和风险溢价。

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But there are other factors affecting the return of stock and there is no direct relation between stock return and the Beta.

但是，股票收益率不仅与贝塔之外的因子有关，而且与贝塔之间的关系也不是线性的。

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Prior to that time, all index funds to that point were beta-seeking products that followed the risk and return of a broad market, less a small fee.

FORBES: Investing in Style with Index Funds

The higher the beta, the higher the risk and the higher the expected return.

FORBES: Study Turns Risk/Reward Relationship On Its Head

Portfolio return is a combination of beta, size and value.

FORBES: Any Monkey Can Beat the Market