Interest
摘要
Transactions involving money form the basis of the modern economy. One of the fundamental properties of money is that it has time value: $100 today is not the same as $100 a year ago, or $100 a year from now. The reason for this is that money can be invested and thus earn more money, that is, it can earn interest. In this chapter, we introduce the basic terminology regarding interest as well as different methods to compute interest.