Due to the following actions, the Dow Jones US Real Estate Index (DJUSRE^sm) will be calculated with a new divisor at the open of trade for trade date Monday, August 6, 2007.

Morgan Stanley is to acquire Crescent Real Estate Equities Co.

American Home Mortgage Investment Corp. REIT is to be deleted due to financial distress.

As a result, the current divisor for the DJUSRE is: 1,165,433,441.

Additional information regarding the divisor for the DJUSRE is available on the CBOT website.