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OneChicago, LLC today reported that 266,891 security futures contracts traded at the Exchange in August 2009. YTD volume stands at 1,576,124.
Open interest stood at 521,159 contracts in August 2009.
The top five contracts by volume in August were:
| Pfizer | PFE1C | 20,046 |
| Altria Group, Inc. | MO1C | 19,000 |
| Merck Company, Inc. | MRK1C | 17,203 |
| Bristol-Myers Squibb Co. | BMY1C | 16,075 |
| Philip Morris International | PM1C | 13,000 |
