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Condensed Statements of Financial Condition (USD $)	Jun. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents (Note 5)	$ 187,671,322	$ 152,952,590
Equity in UBS Securities LLC trading accounts:
Cash	25,916,482	7,540,117
Unrealized gain on open commodity futures contracts	1,365,360	15,866,560
Receivables for units sold		4,221,132
Dividend receivable	1,465	3,904
Other assets	137,744	139,061
Total assets	215,092,373	180,723,364
Liabilities and Partners' Capital
Investment payable	149
Professional fees payable	399,663	419,559
General Partner management fees payable (Note 3)	108,485	81,666
Brokerage commissions payable	7,262	6,282
Other liabilities	20,539	12,595
Total liabilities	536,098	520,102
Commitments and Contingencies (Notes 3, 4 and 5)
Partners' Capital
General Partner
Limited Partners	214,556,275	180,203,262
Total Partners' Capital	214,556,275	180,203,262
Total liabilities and partners' capital	$ 215,092,373	$ 180,723,364
Limited Partners' units outstanding	4,900,000	4,200,000
Net asset value per unit	$ 43.79	$ 42.91
Market value per unit	$ 43.57	$ 43.10

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 9
-Section 03
-Paragraph 15

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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The amount of ownership interest of different classes of partners in limited partnership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Practice Bulletin (PB)
-Number 14
-Paragraph 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The carrying amount of liabilities as of the balance sheet date that pertain to principal and customer trading transactions, or which may be incurred with the objective of generating a profit from short-term fluctuations in price as part of an entity's market-making, hedging and proprietary trading. Examples include short positions in securities, derivatives and commodities, obligations under repurchase agreements, and securities borrowed arrangements.

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Market value per unit.

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Net asset value per unit.

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Professional fees payable Current and Noncurrent

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Unrealized gain (loss) on open commodity futures contracts.

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