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Condensed Schedule of Investments | 6 Months Ended
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Jun. 30, 2012
Condensed Schedule of Investments | United States 12 Month Natural Gas Fund, LP Condensed Schedule of Investments (Unaudited) At June 30, 2012
|  | Number of Contracts |  |  | Unrealized Gain (Loss) on Open Commodity Contracts |  |  | % of Partners’ Capital |
Open Futures Contracts - Long |  |  |  |  |  |  |  |  |  |  |  |
United States Contracts |  |  |  |  |  |  |  |  |  |  |  |
NYMEX Natural Gas Futures NG August 2012 contracts, expiring July 2012 |  |  | 104 |  |  | $ | (597,280 | ) |  |  | (1.46 | )
NYMEX Natural Gas Futures NG September 2012 contracts, expiring August 2012 |  |  | 103 |  |  |  | (536,450 | ) |  |  | (1.31 | )
NYMEX Natural Gas Futures NG October 2012 contracts, expiring September 2012 |  |  | 104 |  |  |  | (552,110 | ) |  |  | (1.35 | )
NYMEX Natural Gas Futures NG November 2012 contracts, expiring October 2012 |  |  | 103 |  |  |  | (366,270 | ) |  |  | (0.90 | )
NYMEX Natural Gas Futures NG December 2012 contracts, expiring November 2012 |  |  | 104 |  |  |  | (307,210 | ) |  |  | (0.75 | )
NYMEX Natural Gas Futures NG January 2013 contracts, expiring December 2012 |  |  | 103 |  |  |  | (176,130 | ) |  |  | (0.43 | )
NYMEX Natural Gas Futures NG February 2013 contracts, expiring January 2013 |  |  | 104 |  |  |  | (57,450 | ) |  |  | (0.14 | )
NYMEX Natural Gas Futures NG March 2013 contracts, expiring February 2013 |  |  | 103 |  |  |  | (74,320 | ) |  |  | (0.18 | )
NYMEX Natural Gas Futures NG April 2013 contracts, expiring March 2013 |  |  | 104 |  |  |  | 51,040 |  |  |  | 0.12 |
NYMEX Natural Gas Futures NG May 2013 contracts, expiring April 2013 |  |  | 103 |  |  |  | 205,570 |  |  |  | 0.50 |
NYMEX Natural Gas Futures NG June 2013 contracts, expiring May 2013 |  |  | 104 |  |  |  | (37,770 | ) |  |  | (0.09 | )
NYMEX Natural Gas Futures NG July 2013 contracts, expiring June 2013 |  |  | 103 |  |  |  | 262,680 |  |  |  | 0.64 |
Total Open Futures Contracts |  |  | 1,242 |  |  | $ | (2,185,700 | ) |  |  | (5.35 | )
|  | Principal Amount |  |  | Market Value |  |  |  |
Cash Equivalents |  |  |  |  |  |  |  |  |  |  |  |
United States Treasury Obligation |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury Bill, 0.09%, 10/11/2012 |  | $ | 3,000,000 |  |  | $ | 2,999,242 |  |  |  | 7.34 |
United States - Money Market Funds |  |  |  |  |  |  |  |  |  |  |  |
Fidelity Institutional Government Portfolio - Class I |  |  | 2,508,989 |  |  |  | 2,508,989 |  |  |  | 6.14 |
Goldman Sachs Financial Square Funds - Government Fund - Class SL |  |  | 1,502,066 |  |  |  | 1,502,066 |  |  |  | 3.68 |
Morgan Stanley Institutional Liquidity Fund - Government Portfolio |  |  | 6,509,036 |  |  |  | 6,509,036 |  |  |  | 15.94 |
Wells Fargo Advantage Government Money Market Fund - Class I |  |  | 5,000,000 |  |  |  | 5,000,000 |  |  |  | 12.24 |
Total Money Market Funds |  |  |  |  |  |  | 15,520,091 |  |  |  | 38.00 |
Total Cash Equivalents |  |  |  |  |  | $ | 18,519,333 |  |  |  | 45.34 |

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- Definition The entire disclosure for the information required in the supplementary schedule applicable to management investment companies summarizing the listing of holdings of unaffiliated investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611225-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Article 12 + Details
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