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请问上升的概率中为什么要剔除分红的部分,道理上能理解,但因为之前课程只有讲不分红的情况。老师这部分公式的推导能否提供一下呢?
NO.PZ2019070101000020问题如下analyst wants to calculate the risk-neutrprobability of up-move for a three-month Europecall option on Astock, he hcollectebelow information: continuously compounrisk-free rate is 4%, Astopays a continuous vinyielof 2%, anAhannustanrviation of 8%. Whiof the following is correct? A.0.55.B.0.62.C.0.79.0.86.A is correct.考点A One-Step BinomiMol-Risk NeutrMetho析首先分别计算 up 和 wn-move factors:U=eσt=e0.080.25=1.041U=e^{\sigma\sqrt t}=e^{0.08\sqrt{0.25}}=1.041U=eσt=e0.080.25=1.0411U=11.041=0.961\frac1U=\frac1{1.041}=0.961U1=1.0411=0.961因此上升的概率 πu=e(r−q)t−−e(0.04−0.02)×0.25−0.9611.041−0.961=0.0440.08=0.55\pi_u=\frac{e^{(r-q)t}-{U-=\frac{e^{(0.04-0.02)\times0.25}-0.961}{1.041-0.961}=\frac{0.044}{0.08}=0.55πu=U−(r−q)t−=1.041−0.961e(0.04−0.02)×0.25−0.961=0.080.044=0.55老师好,这里的r是年化利率?也就是如果是1个月,3个月等这种情况,不用去年化?
请问为什么这个T=三个月=0.25在运算中要开根号呀
请问这是在课件哪一部分 另答案好像显示不全