张同学2021-01-16 15:17:40
请问这个道题的答案为什么是the investor will realize a loss of $2: An investor writes a put option with an exercise price of $40 when the stock price is $42. The option premium is $1. At expiration the stock price is $37.
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Evian, CFA2021-01-18 19:06:50
└(^o^)┘你好同学,
先站在long 方的角度思考,long put,付期权费1元,执行时S=37小于X=40,此时IV=Max[X-S, 0]=3
profit=+3-1=+2
反过来站在short一方,也就是write一方,profit=-2
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