```
 
 
SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 05/18/10                         |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  LONG  | SHORT  |SPREADS |  LONG  | SHORT  |  LONG  | SHORT  |  LONG  | SHORT
--------------------------------------------------------------------------------
(CONTRACTS OF 25 U.S. EPA SO2 EMMISSION              OPEN INTEREST:       16,213
COMMITMENTS
  12,319      351        0    3,878   15,850   16,197   16,201       16       12

CHANGES FROM 05/11/10 (CHANGE IN OPEN INTEREST:     -1,337)
       3        3        0   -1,334   -1,340   -1,331   -1,337       -6        0

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    76.0      2.2      0.0     23.9     97.8     99.9     99.9      0.1      0.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       26)
       4        2        0        8       15       12       17
 
 
SULFUR FINANCIAL INSTR 2009 - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006265
FUTURES ONLY POSITIONS AS OF 05/18/10                         |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  LONG  | SHORT  |SPREADS |  LONG  | SHORT  |  LONG  | SHORT  |  LONG  | SHORT
--------------------------------------------------------------------------------
(CONTRACTS OF 25 U.S. EPA SO2 EMMISSION              OPEN INTEREST:       26,623
COMMITMENTS
  20,645    6,864        5    5,896   19,738   26,546   26,607       77       16

CHANGES FROM 05/11/10 (CHANGE IN OPEN INTEREST:      1,114)
     -14        0        5    1,126    1,100    1,117    1,105       -3        9

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    77.5     25.8      0.0     22.1     74.1     99.7     99.9      0.3      0.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       28)
       8        1        1       14       11       22       13
 
 
CARBON FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006268
FUTURES ONLY POSITIONS AS OF 05/18/10                         |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  LONG  | SHORT  |SPREADS |  LONG  | SHORT  |  LONG  | SHORT  |  LONG  | SHORT
--------------------------------------------------------------------------------
(CONTRACTS OF 1,000 METRIC TONS CCX C02)             OPEN INTEREST:        2,536
COMMITMENTS
   2,353      581        0       30    1,954    2,383    2,535      153        1

CHANGES FROM 05/11/10 (CHANGE IN OPEN INTEREST:          0)
       0       -1        0        0        1        0        0        0        0

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    92.8     22.9      0.0      1.2     77.1     94.0    100.0      6.0      0.0

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       23)
      19        2        0        1        2       20        4
```

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Updated May 27, 2010