Investments in Affiliates (Tables)

6 Months Ended

Jun. 30, 2021

Investments In And Advances To Affiliates Schedule Of Investments [Abstract]

Summary of Transactions in, and Earnings from, Investments in Affiliates

The following is a summary of the transactions in, and earnings from, investments in affiliates for the three and six months ended June 30, 2021.

	Value 03/31/2021		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)			Realized Gain (Loss)		Value 06/30/2021		Dividend Income
Invesco Treasury Collateral    ETF	$	17,438,025	$	—	$	—		$	(2,475	)	$	—	$	17,435,550	$	229
Investments in Affiliated    Money Market Funds:
Invesco Government &    Agency Portfolio,    Institutional Class		53,720,389		41,009,093		(25,624,447	)		—			—		69,105,035		4,369
Total	$	71,158,414	$	41,009,093	$	(25,624,447	)	$	(2,475	)	$	—	$	86,540,585	$	4,598

	Value 12/31/2020		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)		Realized Gain (Loss)		Value 06/30/2021		Dividend Income
Invesco Treasury Collateral    ETF	$	17,435,550	$	—	$	—		$	—	$	—	$	17,435,550	$	2,823
Investments in Affiliated    Money Market Funds:
Invesco Government &    Agency Portfolio,    Institutional Class		68,605,719		85,131,459		(84,632,143	)		—		—		69,105,035		8,680
Total	$	86,041,269	$	85,131,459	$	(84,632,143	)	$	—	$	—	$	86,540,585	$	11,503

The following is a summary of the transactions in, and earnings from, investments in affiliates for the three and six months ended June 30, 2020.

	Value 03/31/2020		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)			Realized Gain (Loss)		Value 06/30/2020		Dividend Income
Invesco Treasury Collateral    ETF	$	—	$	17,486,475	$	—		$	(29,475	)	$	—	$	17,457,000	$	21,341
Investments in Affiliated    Money Market Funds:
Invesco Premier U.S.    Government Money    Portfolio, Institutional    Class		44,464,517		107,325,622		(105,551,565	)		—			—		46,238,574		32,762
Total	$	44,464,517	$	124,812,097	$	(105,551,565	)	$	(29,475	)	$	—	$	63,695,574	$	54,103

	Value 12/31/2019		Purchases at Cost		Proceeds from Sales			Change in Unrealized Appreciation (Depreciation)			Realized Gain (Loss)		Value 06/30/2020		Dividend Income
Invesco Treasury Collateral    ETF	$	—	$	17,486,475	$	—		$	(29,475	)	$	—	$	17,457,000	$	21,341
Investments in Affiliated    Money Market Funds:
Invesco Premier U.S.    Government Money    Portfolio, Institutional    Class		63,714,072		211,409,767		(228,885,265	)		—			—		46,238,574		239,163
Total	$	63,714,072	$	228,896,242	$	(228,885,265	)	$	(29,475	)	$	—	$	63,695,574	$	260,504