This is correct. If we had significant demand then we would consider it. But for now its pretty low on the queue. You're welcome to suggest it on our features poll. http://www.interactivebrokers.com/en/general/poll/poll.php?ib_entity=llc (dhpar - re: variable tick size: these contracts are priced on a yield basis, which means that each tick has a different value, e.g. a move from 94.01 to 94.02 is not the same monetary value as a move from 94.05 to 94.06)