VIX FUTURES - CBOE FUTURES EXCHANGE                                  Code-1170E1
OPTION AND FUTURES COMBINED POSITIONS AS OF 08/02/11          |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  Long  | Short  |Spreads |  Long  | Short  |  Long  | Short  |  Long  | Short
--------------------------------------------------------------------------------
($1000 X INDEX)                                      OPEN INTEREST:      213,494
COMMITMENTS
  22,960   32,901   55,898  106,172   96,484  185,030  185,283   28,464   28,211

CHANGES FROM 07/26/11 (CHANGE IN OPEN INTEREST:     -7,110)
   2,478   -3,510    4,774  -10,527   -5,317   -3,275   -4,053   -3,835   -3,057

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    10.8     15.4     26.2     49.7     45.2     86.7     86.8     13.3     13.2

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:      124)
      40       27       63       27       25      110      100
 

Updated August 5, 2011