The trading unit of common stock of OLYMPUS CORPORATION (code : 7733) are scheduled to be changed on May 1, 2009.

Therefore, OSE is going to change SPAN parameters regarding the Equity Options based upon the above underlying stock on April 30, 2009. The price scan range, the intra-commodity spread charge, and the short option minimum charge on the combined commodity group to which these options belong are divided by 10.