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  <element id="gcc_GoldSeventyFourContractsSettlementDateTwentyEightDecemberTwoThousandElevenMember" name="GoldSeventyFourContractsSettlementDateTwentyEightDecemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_GoldSeventyFourContractsSettlementDateTwentySevenFebruaryTwoThousandTwelveMember" name="GoldSeventyFourContractsSettlementDateTwentySevenFebruaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_GoldSeventyFiveContractsSettlementDateTwentySixAprilTwoThousandTwelveMember" name="GoldSeventyFiveContractsSettlementDateTwentySixAprilTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilSixtyTwoContractsSettlementDateThirtyNovemberTwoThousandElevenMember" name="HeatingOilSixtyTwoContractsSettlementDateThirtyNovemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilSixtyThreeContractsSettlementDateThirtyDecemberTwoThousandElevenMember" name="HeatingOilSixtyThreeContractsSettlementDateThirtyDecemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilSixtyThreeContractsSettlementDateThirtyOneJanuaryTwoThousandTwelveMember" name="HeatingOilSixtyThreeContractsSettlementDateThirtyOneJanuaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilSixtyThreeContractsSettlementDateTwentyNineFebruaryTwoThousandTwelveMember" name="HeatingOilSixtyThreeContractsSettlementDateTwentyNineFebruaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilSixtyThreeContractsSettlementDateThirtyMarchTwoThousandTwelveMember" name="HeatingOilSixtyThreeContractsSettlementDateThirtyMarchTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogsThreeHundredThirtyThreeContractsSettlementDateFourteenDecemberTwoThousandTwelveMember" name="LeanHogsThreeHundredThirtyThreeContractsSettlementDateFourteenDecemberTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogsThreeHundredThirtyThreeContractsSettlementDateFourteenFebruaryTwoThousandTwelveMember" name="LeanHogsThreeHundredThirtyThreeContractsSettlementDateFourteenFebruaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogsThreeHundredThirtyTwoContractsSettlementDateSixteenAprilTwoThousandTwelveMember" name="LeanHogsThreeHundredThirtyTwoContractsSettlementDateSixteenAprilTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilNinetyOneContractsSettlementDateEighteenNovemberTwoThousandElevenMember" name="LightSweetCrudeOilNinetyOneContractsSettlementDateEighteenNovemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilNinetyOneContractsSettlementDateTwentyDecemberTwoThousandElevenMember" name="LightSweetCrudeOilNinetyOneContractsSettlementDateTwentyDecemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilNinetyOneContractsSettlementDateTwentyJanuaryTwoThousandTwelveMember" name="LightSweetCrudeOilNinetyOneContractsSettlementDateTwentyJanuaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilNinetyOneContractsSettlementDateTwentyMarchTwoThousandTwelveMember" name="LightSweetCrudeOilNinetyOneContractsSettlementDateTwentyMarchTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattleTwoHundredFortyTwoContractsSettlementDateThirtyDecemberTwoThousandTwelveMember" name="LiveCattleTwoHundredFortyTwoContractsSettlementDateThirtyDecemberTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattleTwoHundredFortyFourContractsSettlementDateTwentyNineFebruaryTwoThousandTwelveMember" name="LiveCattleTwoHundredFortyFourContractsSettlementDateTwentyNineFebruaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattleTwoHundredFortyThreeContractsSettlementDateThirtyAprilTwoThousandTwelveMember" name="LiveCattleTwoHundredFortyThreeContractsSettlementDateThirtyAprilTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredSeventySevenContractsSettlementDateTwentyEightNovemberTwoThousandElevenMember" name="NaturalGasOneHundredSeventySevenContractsSettlementDateTwentyEightNovemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredSeventyEightContractsSettlementDateTwentyDecemberTwoThousandElevenMember" name="NaturalGasOneHundredSeventyEightContractsSettlementDateTwentyDecemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredSeventyEightContractsSettlementDateTwentySevenJanuaryTwoThousandTwelveMember" name="NaturalGasOneHundredSeventyEightContractsSettlementDateTwentySevenJanuaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredSeventyEightContractsSettlementDateTwentySevenFebruaryTwoThousandTwelveMember" name="NaturalGasOneHundredSeventyEightContractsSettlementDateTwentySevenFebruaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredSeventyEightContractsSettlementDateTwentyEightMarchTwoThousandTwelveMember" name="NaturalGasOneHundredSeventyEightContractsSettlementDateTwentyEightMarchTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_PlatinumTwoHundredThirtyEightContractsSettlementDateTwentySevenJanuaryTwoThousandTwelveMember" name="PlatinumTwoHundredThirtyEightContractsSettlementDateTwentySevenJanuaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_PlatinumTwoHundredThirtyEightContractsSettlementDateTwentySixAprilTwoThousandTwelveMember" name="PlatinumTwoHundredThirtyEightContractsSettlementDateTwentySixAprilTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SilverEightyContractsSettlementDateTwentyEightDecemberTwoThousandElevenMember" name="SilverEightyContractsSettlementDateTwentyEightDecemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SilverEightyContractsSettlementDateTwentyEightMarchTwoThousandTwelveMember" name="SilverEightyContractsSettlementDateTwentyEightMarchTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SilverEightyOneContractsSettlementDateTwentyNineMayTwoThousandTwelveMember" name="SilverEightyOneContractsSettlementDateTwentyNineMayTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SoybeanTwoHundredTwoContractsSettlementDateThirteenJanuaryTwoThousandTwelveMember" name="SoybeanTwoHundredTwoContractsSettlementDateThirteenJanuaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SoybeanTwoHundredThreeContractsSettlementDateFourteenMarchTwoThousandTwelveMember" name="SoybeanTwoHundredThreeContractsSettlementDateFourteenMarchTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SoybeanTwoHundredThreeContractsSettlementDateFourteenMayTwoThousandTwelveMember" name="SoybeanTwoHundredThreeContractsSettlementDateFourteenMayTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SugarSixHundredFiftyFourContractsSettlementDateTwentyNineFebruaryTwoThousandTwelveMember" name="SugarSixHundredFiftyFourContractsSettlementDateTwentyNineFebruaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SugarSixHundredFiftyOneContractsSettlementDateThirtyAprilTwoThousandTwelveMember" name="SugarSixHundredFiftyOneContractsSettlementDateThirtyAprilTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_WheatThreeHundredSeventyEightContractsSettlementDateFourteenDecemberTwoThousandElevenMember" name="WheatThreeHundredSeventyEightContractsSettlementDateFourteenDecemberTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_WheatThreeHundredSeventySevenContractsSettlementDateFourteenMarchTwoThousandTwelveMember" name="WheatThreeHundredSeventySevenContractsSettlementDateFourteenMarchTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_WheatThreeHundredSeventyEightContractsSettlementDateFourteenMayTwoThousandTwelveMember" name="WheatThreeHundredSeventyEightContractsSettlementDateFourteenMayTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilNinetyContractsSettlementDateTwentyOneFebruaryTwoThousandTwelveMember" name="LightSweetCrudeOilNinetyContractsSettlementDateTwentyOneFebruaryTwoThousandTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CocoaThreeHundredFortyFourContractsSettlementDateSixteenMarchTwoThousandElevenMember" name="CocoaThreeHundredFortyFourContractsSettlementDateSixteenMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CocoaThreeHundredFortyThreeContractsSettlementDateThirteenMayTwoThousandElevenMember" name="CocoaThreeHundredFortyThreeContractsSettlementDateThirteenMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CocoaThreeHundredFortyFourContractsSettlementDateFourteenJulyTwoThousandElevenMember" name="CocoaThreeHundredFortyFourContractsSettlementDateFourteenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CoffeeOneHundredSixteenContractsSettlementDateTwentyOneMarchTwoThousandElevenMember" name="CoffeeOneHundredSixteenContractsSettlementDateTwentyOneMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CoffeeOneHundredSixteenContractsSettlementDateEighteenMayTwoThousandElevenMember" name="CoffeeOneHundredSixteenContractsSettlementDateEighteenMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CoffeeOneHundredSixteenContractsSettlementDateNineteenJulyTwoThousandElevenMember" name="CoffeeOneHundredSixteenContractsSettlementDateNineteenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CopperNinetyFourContractsSettlementDateTwentyNineMarchTwoThousandElevenMember" name="CopperNinetyFourContractsSettlementDateTwentyNineMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CopperNinetyFourContractsSettlementDateTwentySixMayTwoThousandElevenMember" name="CopperNinetyFourContractsSettlementDateTwentySixMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CopperNinetyFiveContractsSettlementDateTwentySevenJulyTwoThousandElevenMember" name="CopperNinetyFiveContractsSettlementDateTwentySevenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CornThreeHundredThirtyContractsSettlementDateFourteenMarchTwoThousandElevenMember" name="CornThreeHundredThirtyContractsSettlementDateFourteenMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CornThreeHundredThirtyContractsSettlementDateThirteenMayTwoThousandElevenMember" name="CornThreeHundredThirtyContractsSettlementDateThirteenMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CornThreeHundredThirtyContractsSettlementDateFourteenJulyTwoThousandElevenMember" name="CornThreeHundredThirtyContractsSettlementDateFourteenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CottonOneHundredFiftyFourContractsSettlementDateNineMarchTwoThousandElevenMember" name="CottonOneHundredFiftyFourContractsSettlementDateNineMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CottonOneHundredFiftyOneContractsSettlementDateSixMayTwoThousandElevenMember" name="CottonOneHundredFiftyOneContractsSettlementDateSixMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_CottonOneHundredFiftyTwoContractsSettlementDateSevenJulyTwoThousandElevenMember" name="CottonOneHundredFiftyTwoContractsSettlementDateSevenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_FloridaOrangeJuiceFourHundredTwentySevenContractsSettlementDateElevenMarchTwoThousandElevenMember" name="FloridaOrangeJuiceFourHundredTwentySevenContractsSettlementDateElevenMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_FloridaOrangeJuiceFourHundredTwentyTwoContractsSettlementDateTenthMayTwoThousandElevenMember" name="FloridaOrangeJuiceFourHundredTwentyTwoContractsSettlementDateTenthMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_FloridaOrangeJuiceFourHundredTwentyContractsSettlementDateElevenJulyTwoThousandElevenMember" name="FloridaOrangeJuiceFourHundredTwentyContractsSettlementDateElevenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_GoldSeventyFourContractsSettlementDateTwentyFourFebruaryTwoThousandElevenMember" name="GoldSeventyFourContractsSettlementDateTwentyFourFebruaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_GoldSeventyThreeContractsSettlementDateTwentySevenAprilTwoThousandElevenMember" name="GoldSeventyThreeContractsSettlementDateTwentySevenAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_GoldSeventyThreeContractsSettlementDateTwentyEightJuneTwoThousandElevenMember" name="GoldSeventyThreeContractsSettlementDateTwentyEightJuneTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilFiftyEightContractsSettlementDateThirtyOneJanuaryTwoThousandElevenMember" name="HeatingOilFiftyEightContractsSettlementDateThirtyOneJanuaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilFiftyEightContractsSettlementDateTwentyEightFebruaryTwoThousandElevenMember" name="HeatingOilFiftyEightContractsSettlementDateTwentyEightFebruaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilFiftyNineContractsSettlementDateThirtyOneMarchTwoThousandElevenMember" name="HeatingOilFiftyNineContractsSettlementDateThirtyOneMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilFiftyNineContractsSettlementDateTwentyNineAprilTwoThousandElevenMember" name="HeatingOilFiftyNineContractsSettlementDateTwentyNineAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_HeatingOilFiftyNineContractsSettlementDateThirtyOneMayTwoThousandElevenMember" name="HeatingOilFiftyNineContractsSettlementDateThirtyOneMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogsTwoHundredTwentyFiveContractsSettlementDateFourteenFebruaryTwoThousandElevenMember" name="LeanHogsTwoHundredTwentyFiveContractsSettlementDateFourteenFebruaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogsTwoHundredTwentyFiveContractsSettlementDateFourteenAprilTwoThousandElevenMember" name="LeanHogsTwoHundredTwentyFiveContractsSettlementDateFourteenAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogsTwoHundredTwentyFiveContractsSettlementDateFourteenJuneTwoThousandElevenMember" name="LeanHogsTwoHundredTwentyFiveContractsSettlementDateFourteenJuneTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LeanHogsTwoHundredTwentySixContractsSettlementDateFifteenJulyTwoThousandElevenMember" name="LeanHogsTwoHundredTwentySixContractsSettlementDateFifteenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilSixtySevenContractsSettlementDateTwentyJanuaryTwoThousandElevenMember" name="LightSweetCrudeOilSixtySevenContractsSettlementDateTwentyJanuaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilSixtyEightContractsSettlementDateTwentyTwoFebruaryTwoThousandElevenMember" name="LightSweetCrudeOilSixtyEightContractsSettlementDateTwentyTwoFebruaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilSixtyEightContractsSettlementDateTwentyTwoMarchTwoThousandElevenMember" name="LightSweetCrudeOilSixtyEightContractsSettlementDateTwentyTwoMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilSixtyEightContractsSettlementDateNineteenAprilTwoThousandElevenMember" name="LightSweetCrudeOilSixtyEightContractsSettlementDateNineteenAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LightSweetCrudeOilSixtySevenContractsSettlementDateTwentyMayTwoThousandElevenMember" name="LightSweetCrudeOilSixtySevenContractsSettlementDateTwentyMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattleTwoHundredThirtyEightContractsSettlementDateTwentyEightFebruaryTwoThousandElevenMember" name="LiveCattleTwoHundredThirtyEightContractsSettlementDateTwentyEightFebruaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattleTwoHundredThirtySevenContractsSettlementDateTwentyNineAprilTwoThousandElevenMember" name="LiveCattleTwoHundredThirtySevenContractsSettlementDateTwentyNineAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredFortyTwoContractsSettlementDateTwentySevenJanuaryTwoThousandElevenMember" name="NaturalGasOneHundredFortyTwoContractsSettlementDateTwentySevenJanuaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredFortyTwoContractsSettlementDateTwentyFourFebruaryTwoThousandElevenMember" name="NaturalGasOneHundredFortyTwoContractsSettlementDateTwentyFourFebruaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredFortyTwoContractsSettlementDateTwentyNineMarchTwoThousandElevenMember" name="NaturalGasOneHundredFortyTwoContractsSettlementDateTwentyNineMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredFortyTwoContractsSettlementDateTwentySevenAprilTwoThousandElevenMember" name="NaturalGasOneHundredFortyTwoContractsSettlementDateTwentySevenAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_NaturalGasOneHundredFortyTwoContractsSettlementDateTwentySixMayTwoThousandElevenMember" name="NaturalGasOneHundredFortyTwoContractsSettlementDateTwentySixMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_PlatinumOneHundredSeventySixContractsSettlementDateTwentySevenAprilTwoThousandElevenMember" name="PlatinumOneHundredSeventySixContractsSettlementDateTwentySevenAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_PlatinumOneHundredSeventySevenContractsSettlementDateTwentySevenJulyTwoThousandElevenMember" name="PlatinumOneHundredSeventySevenContractsSettlementDateTwentySevenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SilverSixtyEightContractsSettlementDateTwentyNineMarchTwoThousandElevenMember" name="SilverSixtyEightContractsSettlementDateTwentyNineMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SilverSixtySevenContractsSettlementDateTwentySixMayTwoThousandElevenMember" name="SilverSixtySevenContractsSettlementDateTwentySixMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SilverSixtySevenContractsSettlementDateTwentySevenJulyTwoThousandElevenMember" name="SilverSixtySevenContractsSettlementDateTwentySevenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SoybeanOneHundredFortyEightContractsSettlementDateFourteenMarchTwoThousandElevenMember" name="SoybeanOneHundredFortyEightContractsSettlementDateFourteenMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SoybeanOneHundredFortyNineContractsSettlementDateThirteenMayTwoThousandElevenMember" name="SoybeanOneHundredFortyNineContractsSettlementDateThirteenMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SoybeanOneHundredFortyNineContractsSettlementDateFourteenJulyTwoThousandElevenMember" name="SoybeanOneHundredFortyNineContractsSettlementDateFourteenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SugarThreeHundredTwentyContractsSettlementDateTwentyEightFebruaryTwoThousandElevenMember" name="SugarThreeHundredTwentyContractsSettlementDateTwentyEightFebruaryTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SugarThreeHundredTwentyContractsSettlementDateTwentyNineAprilTwoThousandElevenMember" name="SugarThreeHundredTwentyContractsSettlementDateTwentyNineAprilTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_SugarThreeHundredTwentyOneContractsSettlementDateThirtyJuneTwoThousandElevenMember" name="SugarThreeHundredTwentyOneContractsSettlementDateThirtyJuneTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_WheatTwoHundredFiftySixContractsSettlementDateFourteenMarchTwoThousandElevenMember" name="WheatTwoHundredFiftySixContractsSettlementDateFourteenMarchTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_WheatTwoHundredFiftyEightContractsSettlementDateThirteenMayTwoThousandElevenMember" name="WheatTwoHundredFiftyEightContractsSettlementDateThirteenMayTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_WheatTwoHundredFiftySevenContractsSettlementDateFourteenJulyTwoThousandElevenMember" name="WheatTwoHundredFiftySevenContractsSettlementDateFourteenJulyTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_LiveCattleTwoHundredThirtyNineContractsSettlementDateThirtyJuneTwoThousandElevenMember" name="LiveCattleTwoHundredThirtyNineContractsSettlementDateThirtyJuneTwoThousandElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="gcc_IndexMasterFundMember" name="IndexMasterFundMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
</schema>

