SULFUR FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006261
FUTURES ONLY POSITIONS AS OF 04/28/09                         |
--------------------------------------------------------------| 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:       25,553
COMMITMENTS
  16,487      336      682    8,332   24,500   25,501   25,518       52       35

CHANGES FROM 04/21/09 (CHANGE IN OPEN INTEREST:        536)
     115     -105      -23      452      638      544      510       -8       26

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    64.5      1.3      2.7     32.6     95.9     99.8     99.9      0.2      0.1

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       32)
       7        4        4       14       15       23       21
 
 
CARBON FINANCIAL INSTRUMENT - CHICAGO CLIMATE FUTURES EXCHANGE       Code-006268
FUTURES ONLY POSITIONS AS OF 04/28/09                         |
--------------------------------------------------------------| 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:        3,597
COMMITMENTS
   2,270    2,408      933      114      239    3,317    3,580      280       17

CHANGES FROM 04/21/09 (CHANGE IN OPEN INTEREST:         -3)
      10        0      -28      -15       25      -33       -3       30        0

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    63.1     66.9     25.9      3.2      6.6     92.2     99.5      7.8      0.5

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       26)
      19        4        3        2        2       23        8
 
 
NITROGEN FIN INS ANNUAL 2009 - CHICAGO CLIMATE FUTURES EXCHANGE      Code-00626F
FUTURES ONLY POSITIONS AS OF 04/28/09                         |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  LONG  | SHORT  |SPREADS |  LONG  | SHORT  |  LONG  | SHORT  |  LONG  | SHORT
--------------------------------------------------------------------------------
(CONTRACTS OF 1 U.S. EPA CAIR ANNUAL EMM             OPEN INTEREST:       23,976
COMMITMENTS
   2,449      510        0   21,471   23,410   23,920   23,920       56       56

CHANGES FROM 04/21/09 (CHANGE IN OPEN INTEREST:        930)
     -50      365        0      934      509      884      874       46       56

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
    10.2      2.1      0.0     89.6     97.6     99.8     99.8      0.2      0.2

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       23)
       1        2        0       14       12       15       14
 
 
RGGI CO2 ALLOWANCE - CHICAGO CLIMATE FUTURES EXCHANGE                Code-00626U
FUTURES ONLY POSITIONS AS OF 04/28/09                         |
--------------------------------------------------------------| NONREPORTABLE
      NON-COMMERCIAL      |   COMMERCIAL    |      TOTAL      |   POSITIONS
--------------------------|-----------------|-----------------|-----------------
  LONG  | SHORT  |SPREADS |  LONG  | SHORT  |  LONG  | SHORT  |  LONG  | SHORT
--------------------------------------------------------------------------------
(CONTRACTS OF 1000 RGGI CO2 ALLOWANCES)              OPEN INTEREST:       12,574
COMMITMENTS
   1,097    4,836      994   10,439    6,683   12,530   12,513       44       61

CHANGES FROM 04/21/09 (CHANGE IN OPEN INTEREST:        626)
    -453      531      105    1,048       36      700      672      -74      -46

PERCENT OF OPEN INTEREST FOR EACH CATEGORY OF TRADERS
     8.7     38.5      7.9     83.0     53.1     99.7     99.5      0.3      0.5

NUMBER OF TRADERS IN EACH CATEGORY (TOTAL TRADERS:       27)
       4        5        3       12       11       19       16
 

Updated May 1, 2009