Stephen,
That’s frightening. I had to read this few times but I think I may know why (guessing). The FTSE or DAX, for example, are cash settled, ie at expiry profit/loss is determined by the amount an option is itm or otm in relation to the Cash market. There is no formal exercise.
I suspect the opposite is the case with DOW options – at expiry, if profitable a long or short future position will result. But this doesn’t explain why Oct Dow calls can’t be exercised against Oct futures. I think I’m still puzzled.
However, why did you hedge and hold to expiry? Wouldn’t it have been better to close the position at the time of placing the hedge and taking the profit? After all, by hedging you are protecting your downside but sacrificing your upside, hence no (or limited) further gain. Please correct me if I’m wrong.
Grant.