At its Regular Meeting on September 8, 2004 the Board of Directors approved a recommendation to change the CME Feeder Cattle Index ™ by including Medium and Large Frame #1-2 steers with the existing category of Medium and Large Frame #1 steers. In addition, the weight range for all the animals in both categories will be expanded to 650-849 pounds from 700-849 pounds.

These changes were effective for newly listed contract months, beginning with the August 2005 and September 2005 contracts that were listed for trading on Friday, October 1, 2004.

Rule amendments for these changes are noted in the attached document, with additions underlined and deletions bracketed and overstruck.

For the full text of this advisory...