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Condensed Statements of Financial Condition - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Assets    
Cash and cash equivalents (Notes 2 and 5) $ 2,781,662,080 $ 2,920,517,807
Equity in trading accounts:    
Cash and cash equivalents 205,001,922 249,864,944
Unrealized gain (loss) on open commodity futures contracts 14,799,070 111,290,560
Dividends receivable 278,618 222,951
Directors' fees and insurance receivable 82,126 0
Prepaid registration fees 1,190,919 1,276,832
ETF transaction fees receivable 3,350 5,000
Total assets 3,003,018,085 3,283,178,094
Liabilities and Partners' Capital    
Payable due to Broker 0 110,778,928
Payable for shares redeemed 0 66,943,788
General Partner management fees payable (Note 3) 1,070,065 1,256,212
Professional fees payable 1,098,144 1,829,494
Brokerage commissions payable 187,961 235,961
Directors' fees and insurance payable 0 26,116
License fees payable 97,225 150,926
Total liabilities 2,453,395 181,221,425
Commitments and Contingencies (Notes 3, 4 and 5)
Partners' Capital    
General Partner 0 0
Limited Partners 3,000,564,690 3,101,956,669
Total Partners' Capital 3,000,564,690 3,101,956,669
Total liabilities and partners' capital $ 3,003,018,085 $ 3,283,178,094
Limited Partners' shares outstanding 282,500,000 265,000,000
Net asset value per share $ 10.62 $ 11.71
Market value per share $ 10.64 $ 11.72