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139****6696    2021-09-12 15:49:39    

Bear spreads are those in which an option trader buys a high strike call option and sells a lower strike call. 是否可以是 buy high strike put and sell lower strike put？

187****5764    2021-09-12 15:41:48    

B为什么错了

139****6696    2021-09-12 10:48:25    

An investor is decided to buy a call option with a strike price of $45 for $5 and buy a call option with a strike price of $55 for $1, simultaneously sells two call options with a strike price of $50 for $3, when the stock price turn to be $30, what is th

187****5764    2021-09-11 22:38:39    

D哪错了

134****8899    2021-09-11 20:02:46    

ut不是均值吗 为什么这样算 还有置信区间是怎么出来的 怎么把6400放进去了

138****8878    2021-09-11 18:11:42    

为什么算margin call的时候不用考虑两份合约✖️2，但是算盈利的时候要考虑两份合约✖️2

139****6696    2021-09-11 13:24:42    

想问一下bear spread的公式

139****6696    2021-09-11 13:05:40    

Buying a call at a low exercise price, buying another at a higher exercise price, and selling calls with exercise prices between the high and low is called a butterfly spread.请问老师，low K call期权费高，high K call期权费低对吗？哪个更容易行权？butterfly策略优缺点是什么？

139****6696    2021-09-11 12:57:00    

请问，这种类型的题，1怎么先判断是否行权，怎么判断是不是in the money 或者 out of money，是不是只有in the money才会行权。2,covered call profit 公式是什么老师，是St-So+Co-max（0,S-K）吗？这里St是43么？就是Strike Price？

139****6696    2021-09-11 12:41:54    

请问老师 covered call 收益图形是什么样的？