Let's say this is r1, this is r2 r1 r2 r3 r4 and then this will be r3 and this will be r4.

那么我们可以2,依次把它们称为。

麻省理工公开课 - 固态化学导论课程节选

The return on the portfolio is x1 r1 + x2 r2 + x3 r3.

这个投资组合的收益是。

耶鲁公开课 - 金融市场课程节选

, r1, and r2 for those and I plugged it into that formula, which we just showed.

我计算了σ1，σ2，r1和r2，I，computed，the，σ1，，σ,代入我们刚刚展示的公式。

耶鲁公开课 - 金融市场课程节选

r1 is the yield on the one-period bond and r2 is the yield on the two-period bond.

1是一年期债券的收益率,r2则是两年期债券的收益率

耶鲁公开课 - 金融市场课程节选

rf Actually, I should take that back, this is really rf-- he shows all three.

对了，我应该把那里r2改成-,他设了三个利率值。

耶鲁公开课 - 金融市场课程节选