How wide is the band of stuff that 99.9% usually 95% or 98%, but not 99.9%.

比如在95%-98%几率的情况下,一般是95%或者98%，但是达不到。

耶鲁公开课 - 金融市场课程节选

What they are trying to determine is how wide is the band of outcomes.

他们想,确定收益区间的跨度。

耶鲁公开课 - 金融市场课程节选