But in the real world, the riskless rate is usually stochastic.So this paper generalized the B-S model when the riskless rate was stochastic in chapter 3,and gave the related option pricing formula.

• 但是在现实世界中，无风险利率通常是 随机的，本文在第三章研究了在随机利率下标准B-S模型的推广问题,并给出 了相应的期权定价公式。