Quote from jwcapital:
I wen through the process in March. First, the option expires in the money and it is automatically exercised. You will be charged a commission for the exercised option. Then you will be charged a commission for selling your existing ES contracts. You will be flat. The fee si the same as a commission and with IB, the fees/commissions are neglegible. If you close out both the ES and call, you have to pay commissions anyway. At this point, I would just leave things alone.
jw, is es mini sp500 cash settled always? if you are short 1x itm april call option on the june contract. Upon expiration, will you have short 1x june contract or does IB just deduct money directly from your account to settle the assignment and you end up with no positions.
thanks