在 faedah kompaun 的 formula 里面，mv 是 maturity value 的缩写.
Maturity value is the amount to be received on the due date or on the maturity of instrument/security that investor is holding over its period of time and it is calculated by multiplying the principal amount to the compounding interest which is further calculated by one plus rate of interest to the power which is time period
意思是 到期值 （指到期时，全部价值 包括本金加利息）
