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Condensed Statements of Financial Condition - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Assets    
Cash and cash equivalents (Notes 2 and 5) $ 8,647,690 $ 15,061,018
Equity in trading accounts:    
Cash and cash equivalents 1,192,186 699,804
Unrealized gain (loss) on open commodity futures contracts (313,469) 2,796,004
Receivable from General Partner (Note 3) 24,960 102,092
Dividends receivable 2,236 1,488
Directors' fees and insurance receivable 665 0
ETF transaction fees receivable 0 350
Total assets 9,554,268 18,660,756
Liabilities and Partners' Capital    
Payable due to Broker 0 2,099,689
General Partner management fees payable (Note 3) 6,218 10,437
Professional fees payable 23,921 102,301
Brokerage commissions payable 1,181 1,801
Directors' fees and insurance payable 0 106
License fees payable 397 744
Total liabilities 31,717 2,215,078
Commitments and Contingencies (Notes 3, 4 and 5)
Partners' Capital    
General Partner 0 0
Limited Partners 9,522,551 16,445,678
Total Partners' Capital 9,522,551 16,445,678
Total liabilities and partners' capital $ 9,554,268 $ 18,660,756
Limited Partners' shares outstanding 950,000 1,400,000
Net asset value per share $ 10.02 $ 11.75
Market value per share $ 9.98 $ 11.69