This is a special case, though, because I've assumed that the assets are independent of each other, which isn't usually the case.

这是一个特例，因为我假设了,这个投资组合里的资产是相互独立的，但现实中通常都不是这样的。

耶鲁公开课 - 金融市场课程节选

I've made a very special case that this is the case of an equally-weighted portfolio.

在这里我假设了一个特例,即一个各项资产权重相等的投资组合。

耶鲁公开课 - 金融市场课程节选