Oil is a very important asset, ... so we want to compute what that-- so now we have lots of inputs.
石油是一种重要的资产,我们想计算-,现在我们有许多参数。
He estimates, for his purposes, and he shows you calculations of the efficient portfolio frontier.
他用自己的角度估算了参数,他还给出了计算有效边界的方法。
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