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夫哥哥2011

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[求助] 谁知道在布莱克-斯科尔斯框架下的完备市场假设可否视无风险利率为一函数?

如题,有没有研究金融数学的高手出来答答。这个问题困惑了我很久,按照常理来说,无风险利率是可以随着时间变化而变化的,而B-S框架下的完备市场假说认定其为一常数,若现在视其为一函数,即r(t)会不会破坏了B-S方程的推导?我的意愿是将B-S方程化为一个非线性方程,不知道有没有做过的人开我愚钝!谢谢,回答好了继续奖励!
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