The Exchange has announced changes in Exchange minimum margin requirements to be effective as of the close of business Friday, April 21, 2006.

These changes are detailed on the Exchange’s website at www.cbot.com/cbot/pub/page/0,3181,136,00.html#Changes.

Questions in this regard may be directed to Bruce Domash, 312-341-5989 or bdomash@cbot.com.