Interesting thing about the IVN Dec Call optionsAlmost no Open Interest. (or at best 100 calls)...for any Month...for any strike Price.
EXCEPT for
Dec 10's - open interest = 2657 Call contracts
Dec 12's - open interest = 6489 Call contracts
https://www.m-x.ca/nego_cotes_en.php?symbol=IVN*
go figure, eh?