VIX FUTURES - CBOE FUTURES EXCHANGE                                  Code-1170E1
OPTION AND FUTURES COMBINED POSITIONS AS OF 05/13/08          |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  Long  | Short  |Spreads |  Long  | Short  |  Long  | Short  |  Long  | Short
--------------------------------------------------------------------------------
($1000 X INDEX)                                      OPEN INTEREST:       67,185
COMMITMENTS
  12,262   23,291    6,184   35,660   33,198   54,106   62,673   13,079    4,512

CHANGES FROM 05/06/08 (CHANGE IN OPEN INTEREST:      6,966)
   2,635   -3,110    1,773    3,424    6,691    7,832    5,354     -866    1,612

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    18.3     34.7      9.2     53.1     49.4     80.5     93.3     19.5      6.7

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       35)
      15       11        8        9        4       30       17
 

Updated May 16, 2008