Hi Sails - thanks for the reply and the link too, I had yet to find that page.
So to make sure I have it right if I had bought 1 NCMBM option contract at 0.675 it is now an option to buy 1082 NCM shares at 23.11 rather than 1000 at 25.00. I can understand that. I think the bit I was missing was that if nothing else changed the price of NCM should drop by the same amount the strike price was reduced, hence the option price would have been effectively the same as the day prior to the adjustment. In this case the price of NCM rose when the trading halt was lifted and so NCMBM is now considerably in the money. I think that reasoning is right, please correct me if I am wrong anyone!
Cheers,
Richard.