You should see that the blue line is better than the pink line because, for any expected return, the blue line is to the left of the pink line, right?

可以看到蓝线比粉线好,原因是对于任意的预期收益率，蓝线都在粉线的左边，对吧？

耶鲁公开课 - 金融市场课程节选

So, we should use that, but people in finance resist using that because it's a lower number and when you're advertising your return you want to make it look as big as possible.

所以我们应该用这个指标,但金融界反感使用几何平均,因为它比其他平均数都来得小,他们为自己的收益率做广告时,当然希望数字越大越好

耶鲁公开课 - 金融市场课程节选