VIX FUTURES - CBOE FUTURES EXCHANGE                                  Code-1170E1
OPTION AND FUTURES COMBINED POSITIONS AS OF 05/17/11          |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  Long  | Short  |Spreads |  Long  | Short  |  Long  | Short  |  Long  | Short
--------------------------------------------------------------------------------
($1000 X INDEX)                                      OPEN INTEREST:      244,181
COMMITMENTS
  30,356   37,590   45,169  140,213  141,526  215,737  224,285   28,443   19,896

CHANGES FROM 05/10/11 (CHANGE IN OPEN INTEREST:     16,112)
     679   -3,557    4,879   12,745   14,533   18,303   15,855   -2,191      257

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    12.4     15.4     18.5     57.4     58.0     88.4     91.9     11.6      8.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:      127)
      46       29       55       29       29      111       98
 

Updated May 20, 2011