VIX FUTURES - CBOE FUTURES EXCHANGE                                  Code-1170E1
OPTION AND FUTURES COMBINED POSITIONS AS OF 12/20/05          |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  Long  | Short  |Spreads |  Long  | Short  |  Long  | Short  |  Long  | Short
--------------------------------------------------------------------------------
($100 X VBI)                                         OPEN INTEREST:        7,682
COMMITMENTS
   4,282    3,011      246    1,462    3,836    5,990    7,093    1,692      589

CHANGES FROM 12/13/05 (CHANGE IN OPEN INTEREST:     -1,050)
    -104     -590     -166   -1,039       -5   -1,309     -761      259     -289

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADER
    55.7     39.2      3.2     19.0     49.9     78.0     92.3     22.0      7.7

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       27)
      14        4        7        2        3       23       12
 

Updated December 23, 2005