Additional Valuation Information (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Summary of the Tiered Valuation Input Levels

The following is a summary of the tiered valuation input levels as of December 31, 2019:

	Level 1			Level 2		Level 3		Total
Investments in Securities
United States Treasury Obligations	$	—		$	664,863,392	$	—	$	664,863,392
Exchange-Traded Fund		250,383,096			—		—		250,383,096
Money Market Mutual Fund		517,499,491			—		—		517,499,491
Total Investments in Securities		767,882,587			664,863,392		—		1,432,745,979
Other Investments - Assets(a)
Commodity Futures Contracts		67,605,844			—		—		67,605,844
Other Investments - Liabilities(a)
Commodity Futures Contracts		(19,911,449	)		—		—		(19,911,449	)
Total Other Investments		47,694,395			—		—		47,694,395
Total Investments	$	815,576,982		$	664,863,392	$	—	$	1,480,440,374

^(a) Unrealized appreciation (depreciation).

The following is a summary of the tiered valuation input levels as of December 31, 2018:

	Level 1			Level 2		Level 3		Total
Investments in Securities
United States Treasury Obligations	$	—		$	1,614,425,920	$	—	$	1,614,425,920
Exchange-Traded Fund		250,145,856			—		—		250,145,856
Money Market Mutual Fund		144,939,067			—		—		144,939,067
Total Investments in Securities		395,084,923			1,614,425,920		—		2,009,510,843
Other Investments - Assets(a)
Commodity Futures Contracts		9,428,661			—		—		9,428,661
Other Investments - Liabilities(a)
Commodity Futures Contracts		(253,228,835	)		—		—		(253,228,835	)
Total Other Investments		(243,800,174	)		—		—		(243,800,174	)
Total Investments	$	151,284,749		$	1,614,425,920	$	—	$	1,765,710,669

^(a) Unrealized appreciation (depreciation).