看涨期权X=50美元。标的股票的现价S=55美元。看涨期权售价10美元。根据波动性的估计值为0.30,求出N(d1)=0.6,N(d2)=0.5。无风险利率为零。期权价格的隐含波动性是高于还是低于0.307为什么?
The passage implied Louis-Dreyfus had done a lot of advertising .
A.Y
B.N
C.NG
It is implied that the solution to noise problem may be______.
A.money-consuming
B.not existing
C.time-consuming
D.better planning
It is implied in the passage that the villager______.
A.wants a plentiful supply of trees
B.wants fire wood
C.wants to get money
D.is not aware of the importance of environmental protection