http://www.cbot.com/cbot/pub/page/0,3181,1082+TY+all+2008,00.html The cbot web pages is a clear as mud on this. IB says that the options expire May 1st but they usually get the dates wrong on this topic. (And it should be noted that no information is worse than bad information) By my math they should expire on April 25th. Does anyone else have the same conclusion?