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Condensed Schedule of Investments (Parenthetical) (United States) | 9 Months Ended
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Sep. 30, 2012
NYMEX Natural Gas Futures NG November 2012 contracts, expiring October 2012 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | October 2012
NYMEX Natural Gas Futures NG December 2012 contracts, expiring November 2012 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | November 2012
NYMEX Natural Gas Futures NG January 2013 contracts, expiring December 2012 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | December 2012
NYMEX Natural Gas Futures NG February 2013 contracts, expiring January 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | January 2013
NYMEX Natural Gas Futures NG March 2013 contracts, expiring February 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | February 2013
NYMEX Natural Gas Futures NG April 2013 contracts, expiring March 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | March 2013
NYMEX Natural Gas Futures NG May 2013 contracts, expiring April 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | April 2013
NYMEX Natural Gas Futures NG June 2013 contracts, expiring May 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | May 2013
NYMEX Natural Gas Futures NG July 2013 contracts, expiring June 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | June 2013
NYMEX Natural Gas Futures NG August 2013 contracts, expiring July 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | July 2013
NYMEX Natural Gas Futures NG September 2013 contracts, expiring August 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | August 2013
NYMEX Natural Gas Futures NG October 2013 contracts, expiring September 2013 | Open Cleared Swap and Futures Contracts | Open Futures Contracts, Long |
Expiration date | September 2013
US Treasury Bill Securities | US Treasury Securities | Cash Equivalents |
Interest rate | 0.09%
Expiration date | 2012-10-11

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