来自《耶鲁大学开放课程：金融市场 第2集 第2集》

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  And the slope is called beta.
  斜率用beta表示
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  That may be a familiar enough concept to you,
  这个概念你们应该很熟悉了
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  but in the context of finance this is a major concept.
  在金融学中 这是个很重要的概念
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  The way I've written it, the beta of Shiller, Inc.
  希勒公司.的beta值
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  is the slope of this line.
  就是这条直线的斜率
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  The alpha is just the intercept of this curve.
  alpha是截距
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  We can also do this with excess returns.
  我们也可以它来表示超额收益
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  I will get to this later,
  迟一些我会讲到
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  where I have the return minus the interest rate on this axis
  就是用这个轴表示收益减去利率
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  and the market return minus the interest rate on this axis.
  这个轴表示市场收益率减去利率
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  In that case, alpha is a
  这样的话 alpha就用以衡量
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  measure of how much Shiller,Inc. outperforms.
  希勒公司.表现超过市场平均水平多少