There is something wrong with this topic. 1 is 50ETF, not ETE, 2. What do you mean "contract reference time 20 15 12 18?" Sorry, there is no such thing in the real world. I can only understand that the expiration date of the option given in the title is 20 15 12 18 (but this is also wrong in the real world, the option expires on the fourth Wednesday of each month, and 12 18 is the third Friday, which is the expiration time of stock index futures). 4. Operation Research on Call Option and Put Option of 50 ETF Price Trend? That is, only directional trading is considered? A tall option instantly became futures 2.0.

Ok, I'm done. Let me go back to a student and finish this problem.

Given that the expiration date of the option is 20 15 12 18, there are still 14 days (18 trading days) from 12 4 to 18.

1、

Steady: sell 65438+February 2550 call option+sell 65438+February 2250 put option.

Radical: sell 65438+February 2500 call option+sell 65438+February 2300 put option.

2、

Buy 2300 call options+sell 2600 call options.

Well, that's it for the time being.