Interest rates are used to discount those cash flows and calculate their present value.
利率是用于对于未来现金流折现的。
The value of a bond is the present value both of future interest to be received and the par or maturity value of the bond.
债券的价值等于投资者将来所收到的利息收入和本金以及票面溢值的现值之和。
On the other hand, the moment, the second moment and variance of the present value random variables about some life annuities and annuities with random interest rate are gotten.
另一方面讨论了随机利率下的一些离散年金、连续年金和连续生存年金现值随机变量的一阶和二阶原点矩及其方差。
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