在书本上看到这样一道题目:
It is May and a trader writes a september call option with a strike price of 20. The stock price is 18, and the option price is 2. Describe the investor's cash flows if the option is held until september and stock price is 25 at this time.
我看到答案是说:在五月份流入2,在九月份流出5.
[backcolor=rgba(255, 255, 255, 0.8)]想不清楚的问题是:看涨期权开空仓后,到期日平仓必须要履行期权的?书上不是说,行权与否不是期权持有者自己的选择吗?既然都亏损了,怎么还要去行权?


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