The total revenues were $795.9m for the second quarter of 2012, compared to $838.3m for the same period a year ago.
Operating income decreased to $469.2m for the quarter, compared to $534.5m for the same period in the previous year.
The effective tax rate for the quarter fell to 36.4% excluding the non-recurring items.
CME Group CEO Phupinder Gill said that the company is dedicated to run the business efficiently and took several strategic steps during the second quarter.
"As a result of these actions, adjusted expenses were down more than five percent compared with the first quarter, while revenues were up three percent, reflecting growth in equities, foreign exchange and agricultural products and our co-location business," Gill said.
