He was given a 40-year sentence in 1992, which was later reduced to 30 years on appeal and further reduced to 17 years.

VOA: standard.2010.07.07

Suppose someone has been investing money for n years and xi is the return on the investment in a given year.

假设有人投资了n年,Xi是第i年的收益率

耶鲁公开课 - 金融市场课程节选