10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended June 30, 2018

or

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from ________ to ________

Commission File Number: 001-32947

iShares® S&P GSCI™ Commodity-Indexed Trust

(Exact name of registrant as specified in its charter)

Delaware	51-6573369
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

c/o iShares Delaware Trust Sponsor LLC

400 Howard Street

San Francisco, California 94105

Attn: Product Management Team

iShares Product Research & Development

(Address of principal executive offices)(Zip Code)

(415) 670-2000

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒	Accelerated filer ☐
Non-accelerated filer ☐ (Do not check if a smaller reporting company)	Smaller reporting company ☐	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Table of Contents

		Page
PART I – FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)	1
	Statements of Assets and Liabilities at June 30, 2018 and December 31, 2017	1
	Statements of Operations for the three and six months ended June 30, 2018 and 2017	2
	Statements of Changes in Net Assets for the six months ended June 30, 2018 and the year ended December 31, 2017	3
	Statements of Cash Flows for the six months ended June 30, 2018 and 2017	4
	Schedules of Investments at June 30, 2018 and December 31, 2017	5
	Notes to Financial Statements	6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	11
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	13
Item 4.	Controls and Procedures	13
PART II – OTHER INFORMATION
Item 1.	Legal Proceedings	14
Item 1A.	Risk Factors	14
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	14
Item 3.	Defaults Upon Senior Securities	14
Item 4.	Mine Safety Disclosures	14
Item 5.	Other Information	14
Item 6.	Exhibits	15
SIGNATURES		16

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements

iShares S&P GSCI™ Commodity-Indexed Trust

Statements of Assets and Liabilities (Unaudited)

At June 30, 2018 and December 31, 2017

	June 30,		December 31,
	2018		2017
Assets
Cash	$	23,579,730	$	41,786,279
Short-term investments(a)		1,395,131,529		1,303,307,115
Short-term investments held at the broker (restricted)(b)		44,686,939		40,347,527
Receivable for capital Shares sold		—		3,263,400
Receivable for variation margin on open futures contracts (Note 9)		19,193,406		5,558,077
Total Assets		1,482,591,604		1,394,262,398
Liabilities
Sponsor’s fees payable		885,577		847,758
Brokerage commissions and fees payable		5,513		5,875
Total Liabilities		891,090		853,633
Commitments and contingent liabilities (Note 7)		—		—
Net Assets	$	1,481,700,514	$	1,393,408,765
Shares issued and outstanding(c)		82,650,000		85,400,000
Net asset value per Share (Note 2G)	$	17.93	$	16.32

(a)	Cost of short-term investments: $1,394,953,464 and $1,303,324,809, respectively.
(b)	Cost of short-term investments held at the broker (restricted): $44,677,642 and $40,346,355, respectively.
(c)	No par value, unlimited amount authorized.

See notes to financial statements.

1

iShares S&P GSCI™ Commodity-Indexed Trust

Statements of Operations (Unaudited)

For the three and six months ended June 30, 2018 and 2017

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Investment Income
Interest	$	5,985,450		$	1,908,967		$	10,697,970		$	3,295,771
Total investment income		5,985,450			1,908,967			10,697,970			3,295,771
Expenses
Sponsor’s fees		2,722,583			1,905,690			5,385,303			3,893,578
Brokerage commissions and fees		349,749			311,842			717,805			639,978
Total expenses		3,072,332			2,217,532			6,103,108			4,533,556
Net investment income (loss)		2,913,118			(308,565	)		4,594,862			(1,237,785	)
Net Realized and Unrealized Gain (Loss)
Net realized gain (loss) from:
Short-term investments		(457	)		3,899			618			4,972
Futures contracts		87,476,140			(90,226,772	)		172,734,880			(126,354,568	)
Net realized gain (loss)		87,475,683			(90,222,873	)		172,735,498			(126,349,596	)
Net change in unrealized appreciation/depreciation on:
Short-term investments		173,937			26,744			203,884			20,106
Futures contracts		18,892,760			34,319,883			(42,413,107	)		13,168,498
Net change in unrealized appreciation/depreciation		19,066,697			34,346,627			(42,209,223	)		13,188,604
Net realized and unrealized gain (loss)		106,542,380			(55,876,246	)		130,526,275			(113,160,992	)
Net increase (decrease) in net assets resulting from operations	$	109,455,498		$	(56,184,811	)	$	135,121,137		$	(114,398,777	)
Net increase (decrease) in net assets per Share	$	1.31		$	(0.79	)	$	1.58		$	(1.61	)

See notes to financial statements.

2

iShares S&P GSCI™ Commodity-Indexed Trust

Statements of Changes in Net Assets (Unaudited)

For the six months ended June 30, 2018 and the year ended December 31, 2017

	Six Months Ended June 30, 2018			Year Ended December 31, 2017
Net Assets, Beginning of Period	$	1,393,408,765		$	1,035,799,565
Operations:
Net investment income (loss)		4,594,862			(160,492	)
Net realized gain		172,735,498			3,413,696
Net change in unrealized appreciation/depreciation		(42,209,223	)		77,165,412
Net increase in net assets resulting from operations		135,121,137			80,418,616
Capital Share Transactions:
Contributions for Shares issued		108,095,591			349,609,325
Distributions for Shares redeemed		(154,924,979	)		(72,418,741	)
Net increase (decrease) in net assets from capital share transactions		(46,829,388	)		277,190,584
Increase in net assets		88,291,749			357,609,200
Net Assets, End of Period	$	1,481,700,514		$	1,393,408,765
Shares issued and redeemed
Shares issued		6,450,000			24,050,000
Shares redeemed		(9,200,000	)		(4,950,000	)
Net increase (decrease) in Shares issued and outstanding		(2,750,000	)		19,100,000

See notes to financial statements.

3

iShares S&P GSCI™ Commodity-Indexed Trust

Statements of Cash Flows (Unaudited)

For the six months ended June 30, 2018 and 2017

	Six Months Ended June 30,
	2018			2017
Cash Flows from Operating Activities
Net increase (decrease) in net assets resulting from operations	$	135,121,137		$	(114,398,777	)
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of short-term investments		(6,548,975,208	)		(2,976,796,318	)
Sales/maturities of short-term investments		6,463,712,100			2,980,618,506
Accretion of discount		(10,696,216	)		(3,294,656	)
Net realized (gain) loss on short-term investments		(618	)		(4,972	)
Net change in unrealized appreciation/depreciation on short-term investments		(203,884	)		(20,106	)
Change in operating assets and liabilities:
Receivable for variation margin on open futures contracts		(13,635,329	)		(21,815,333	)
Payable for variation margin on open futures contracts		—			(1,187,213	)
Sponsor’s fees payable		37,819			(28,614	)
Brokerage commissions and fees payable		(362	)		(5,726	)
Net cash provided by (used in) operating activities		25,359,439			(136,933,209	)
Cash Flows from Financing Activities
Contributions for Shares issued		111,358,991			215,476,387
Distributions for Shares redeemed		(154,924,979	)		(60,652,732	)
Net cash provided by (used in) financing activities		(43,565,988	)		154,823,655
Net increase (decrease) in cash and cash equivalents		(18,206,549	)		17,890,446
Cash
Beginning of period
Unrestricted – cash		41,786,279			35,276,938
End of period
Unrestricted – cash	$	23,579,730		$	53,167,384

See notes to financial statements.

4

iShares S&P GSCI™ Commodity-Indexed Trust

Schedules of Investments (Unaudited)

At  June 30, 2018 and  December 31, 2017

June 30, 2018
Security Description	Face Amount		Fair Value
U.S. Treasury bills(a)(b):
1.78% – 1.82% due 07/05/18	$	411,000,000	$	410,943,146
1.67% – 1.80% due 07/12/18		490,000,000		489,771,841
1.79% – 1.84% due 07/19/18		290,000,000		289,762,058
1.93% due 08/23/18		250,000,000		249,341,423
Total U.S. Treasury bills (Cost: $1,439,631,106)				1,439,818,468
Total Investments – 97.17%				1,439,818,468
Other Assets, Less Liabilities – 2.83%				41,882,046
Net Assets – 100.00%			$	1,481,700,514

(a)	A portion of the above United States Treasury bills are posted as margin for the Trust’s Index Futures positions as described in Note 2D.
(b)	Rates shown are discount rates paid at the time of purchase.

As of June 30, 2018, the open S&P GSCI-ER futures contracts were as follows:
Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
55,167	September 2018	$	1,475,606,916	$	31,985,378

December 31, 2017
Security Description	Face Amount		Fair Value
U.S. Treasury bills(a)(b):
1.17% – 1.20% due 01/04/18	$	116,000,000	$	115,992,693
1.11% – 1.21% due 01/18/18		144,000,000		143,920,719
1.20% due 01/25/18		142,000,000		141,888,412
1.15% due 02/01/18		434,500,000		434,041,811
1.31% due 03/08/18		509,000,000		507,811,007
Total U.S. Treasury bills (Cost: $1,343,671,164)				1,343,654,642
Total Investments – 96.43%				1,343,654,642
Other Assets, Less Liabilities – 3.57%				49,754,123
Net Assets – 100.00%			$	1,393,408,765

(a)	A portion of the above United States Treasury bills are posted as margin for the Trust’s Index Futures positions as described in Note 2D.
(b)	Rates shown are discount rates paid at the time of purchase.

As of December 31, 2017, the open S&P GSCI-ER futures contracts were as follows:
Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
56,905	March 2018	$	1,388,834,811	$	74,398,485

See notes to financial statements.

5

iShares S&P GSCI™ Commodity-Indexed Trust

Notes to Financial Statements (Unaudited)

June 30, 2018

1 - Organization

The iShares S&P GSCI™ Commodity-Indexed Trust (the “Trust”) is a Delaware statutory trust that was organized under the laws of the State of Delaware on July 7, 2006 and commenced operations on July 10, 2006. iShares Delaware Trust Sponsor LLC, a Delaware limited liability company, is the sponsor of the Trust (the “Sponsor”). The sole member and manager of the Sponsor is BlackRock Asset Management International Inc., a Delaware corporation. BlackRock Institutional Trust Company, N.A. is the trustee of the Trust (the “Trustee”). The Trust is governed by the Third Amended and Restated Trust Agreement, dated as of December 31, 2013 (the “Trust Agreement”), among the Sponsor, the Trustee and Wilmington Trust Company (the “Delaware Trustee”). The Trust issues units of beneficial interest (“Shares”) representing fractional undivided beneficial interests in its net assets.

The Trust holds long positions in exchange-traded index futures contracts of various expirations (“Index Futures”) on the S&P GSCI™ Excess Return Index (“S&P GSCI-ER”). In order to collateralize its Index Futures positions and to reflect the U.S. Treasury component of the S&P GSCI™ Total Return Index (the “Index”), the Trust also holds “Collateral Assets,” which consist of cash, U.S. Treasury securities or other short-term securities and similar securities that are eligible as margin deposits for those Index Futures positions. The Index Futures held by the Trust are listed on the Chicago Mercantile Exchange (the “CME”).

The Trust seeks to track the results of a fully collateralized investment in futures contracts on an index composed of a diversified group of commodities futures. The Trust seeks to track the investment returns of the Index before payment of the Trust’s expenses and liabilities.

The Trust is a commodity pool, as defined in the Commodity Exchange Act (the “CEA”) and the applicable regulations of the Commodity Futures Trading Commission (the “CFTC”), and is operated by the Sponsor, a commodity pool operator registered with the CFTC. The Sponsor is an indirect subsidiary of BlackRock, Inc. (“BlackRock”). BlackRock Fund Advisors (the “Advisor”), an indirect subsidiary of BlackRock, serves as the commodity trading advisor of the Trust and is registered with the CFTC.

The accompanying unaudited financial statements were prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions for Form 10-Q and the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). In the opinion of management, all material adjustments, consisting only of normal recurring adjustments considered necessary for a fair statement of the interim period financial statements have been made. Interim period results are not necessarily indicative of results for a full-year period. These financial statements and the notes thereto should be read in conjunction with the Trust’s financial statements included in its Annual Report on Form 10‑K for the year ended December 31, 2017, as filed with the SEC on February 28, 2018.

The Trust qualifies as an investment company for accounting purposes and follows the accounting and reporting guidance under the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic 946, Financial Services – Investment Companies, but is not registered, and is not required to be registered, as an investment company under the Investment Company Act of 1940, as amended.

2 - Significant Accounting Policies

A. Basis of Accounting

The following significant accounting policies are consistently followed by the Trust in the preparation of its financial statements in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Certain statements and captions in the financial statements for the prior periods have been changed to conform to the current financial statement presentation.

B. Investment in Index Futures

The Trust seeks to track the results of a fully collateralized investment in futures contracts on an index composed of a diversified group of commodities futures, including energy commodities, precious and industrial metal commodities, agricultural commodities and livestock commodities. The Trust seeks to track the investment returns of the Index before payment of the Trust’s expenses and liabilities.

The assets of the Trust consist of Index Futures and cash or other Collateral Assets used to satisfy applicable margin requirements for those Index Futures positions. Index Futures are exchange-traded index futures contracts on the S&P GSCI-ER, and are expected to include contracts of different terms and expirations. The Trust is expected to roll out of existing positions in Index Futures and establish new positions in Index Futures on an ongoing basis. When establishing positions in Index Futures, the Trust is required to deposit cash or other Collateral Assets with the broker as “initial margin.” On a daily basis, the Trust is obligated to pay, or entitled to receive, cash in an amount equal to the change in the daily settlement level of its Index Futures positions. Such payments or receipts are known as variation margin. Variation margin is recorded as unrealized appreciation (depreciation) and, if any, shown as variation margin receivable (or payable) on futures contracts in the Statements of Assets and Liabilities. When an Index Futures contract is closed, the Trust records a realized gain or loss based on the difference between the value of the Index Futures contract at the time it was opened and the value at the time it was closed.

Index Futures are derivative instruments valued at fair value, which the Trustee has determined to be that day’s announced settlement price on the CME or any such other futures exchange listing Index Futures (the “Exchange”). If there is no announced settlement price for a particular Index Futures contract on that day, the Trustee will use the most recently announced settlement price unless the Trustee, in consultation with the Sponsor, determines that such price is inappropriate as a basis for valuation. The Trust’s derivatives are not designated as hedges, and all changes in the fair value are reflected in the statements of operations.

6

For futures contracts, counterparty credit risk is mitigated because futures contracts are exchange-traded and the exchange’s clearing house acts as central counterparty to all exchange-traded futures contracts (although customers continue to have credit exposure to the clearing member who holds their account).

Please refer to Note 9 for additional disclosures regarding the Trust’s investments in futures contracts.

C. Cash

The Trust considers cash as currencies deposited in one or more bank account.

D. Short-Term Investments

Short-term investments on the statements of assets and liabilities consist principally of short-term fixed income securities with original maturities of one year or less. These investments are valued at fair value.

As of June 30, 2018 and December 31, 2017, the Trust had restricted short-term investments held at the broker of $44,686,939 and $40,347,527, respectively, which were posted as margin for the Trust’s Index Futures positions.

E. Securities Transactions and Income Recognition

Securities transactions are accounted for on the trade date. Realized gains and losses on investment transactions are determined using the specific identification method. Interest income, including amortization and accretion of premiums and discounts on debt securities, is recognized daily on the accrual basis.

F. Income Taxes

The Trust is treated as a partnership for federal, state and local income tax purposes.

No provision for federal, state, and local income taxes has been made in the accompanying financial statements because the Trust is not subject to income taxes. Shareholders are individually responsible for their own tax payments on their proportionate share of income, gain, loss, deduction, expense and credit.

The Sponsor has reviewed the tax positions as of June 30, 2018, inclusive of the open tax return years, and has determined that no provision for income tax is required in the Trust’s financial statements.

G. Calculation of Net Asset Value

The net asset value of the Trust on any given day is obtained by subtracting the Trust’s accrued expenses and other liabilities on that day from the value of (1) the Trust’s Index Futures positions and Collateral Assets on that day, (2) the interest earned on those assets by the Trust and (3) any other assets of the Trust, as of 4:00 p.m. (New York time) that day. The Trustee determines the net asset value per Share (the “NAV”) by dividing the net asset value of the Trust on a given day by the number of Shares outstanding at the time the calculation is made. The NAV is calculated each day on which NYSE Arca, Inc. (“NYSE Arca”) is open for regular trading, as soon as practicable after 4:00 p.m. (New York time).

H. Distributions

Interest and distributions received by the Trust on its assets may be used to acquire additional Index Futures and Collateral Assets or, in the discretion of the Sponsor, distributed to shareholders. The Trust is under no obligation to make periodic distributions to shareholders.

3 - Offering of the Shares

Shares are issued and redeemed continuously in one or more blocks of 50,000 Shares (the “Baskets”) in exchange for Index Futures and cash (or, in the discretion of the Sponsor, other Collateral Assets in lieu of cash). Only registered broker-dealers who have entered into an authorized participant agreement with the Trust (each, an “Authorized Participant”) may purchase or redeem Baskets. Individual investors that are not Authorized Participants cannot purchase or redeem Shares in direct transactions with the Trust. Authorized Participants may redeem their Shares (as well as Shares on behalf of other investors) at any time before 2:40 p.m. (New York time) on any business day in one or more Baskets. Redemptions of Shares in exchange for baskets of Index Futures and cash (or, in the discretion of the Sponsor, other Collateral Assets in lieu of cash) are treated as sales for financial statement purposes.

It is possible that, from time to time, BlackRock and/or funds or other accounts managed by the Trustee or an affiliate (collectively, “Affiliates”) may purchase and hold Shares of the Trust. Affiliates reserve the right, subject to compliance with applicable law, to sell into the market or redeem Baskets through an Authorized Participant at any time some or all of the Shares of the Trust acquired for their own accounts. A large sale or redemption of Shares of the Trust by Affiliates could significantly reduce the asset size of the Trust, which might have an adverse effect on the Trust and the Shares that remain outstanding. As of June 30, 2018, there were no affiliated accounts that individually represented 10% or more ownership of the Trust’s total Shares outstanding.

7

4 - Trust Expenses

The Trust is responsible for paying any applicable brokerage commissions and similar transaction fees out of its assets in connection with the roll of Index Futures held by the Trust. These expenses are recorded as brokerage commissions and fees in the statements of operations as incurred.

The Sponsor pays the amounts that would otherwise be considered the ordinary operating expenses, if any, of the Trust. In return, the Sponsor receives an allocation from the Trust that accrues daily at an annualized rate equal to 0.75% of the net asset value of the Trust, as calculated before deducting fees and expenses based on the value of the Trust’s assets.

The Sponsor has agreed under the Trust Agreement to pay the following administrative, operational and marketing expenses: (1) the fees of the Trustee, the Delaware Trustee, the Advisor and their respective agents, (2) NYSE Arca listing fees, (3) printing and mailing costs, (4) audit fees, (5) fees for registration of the Shares with the SEC, (6) tax reporting costs, (7) license fees and (8) legal expenses relating to the Trust of up to $100,000 annually.

5 - Related Parties

The Sponsor, the Trustee and the Advisor are considered to be related parties to the Trust. The Trustee’s and Advisor’s fees are paid by the Sponsor and are not a separate expense of the Trust.

6 - Indemnification

The Trust Agreement provides that the Sponsor and its shareholders, directors, officers, employees, affiliates (as such term is defined under the Securities Act of 1933, as amended) and subsidiaries and agents shall be indemnified from the Trust and held harmless against any loss, liability, claim, cost, expense or judgment of any kind whatsoever (including the reasonable fees and expenses of counsel) arising out of or in connection with the performance of their obligations under the Trust Agreement or any actions taken in accordance with the provisions of the Trust Agreement and incurred without their (1) negligence, bad faith or willful misconduct or (2) reckless disregard of their obligations and duties under the Trust Agreement.

The investment advisory agreement (the “Advisory Agreement”) between the Trust and the Advisor provides that the Advisor and its shareholders, directors, officers, employees, affiliates (as such term is defined under the Securities Act of 1933, as amended) and subsidiaries shall be indemnified from the Trust and held harmless against any loss, liability, cost, expense or judgment (including the reasonable fees and expenses of counsel) arising out of or in connection with the performance of its obligations under the Advisory Agreement or any actions taken in accordance with the provisions of the Advisory Agreement and incurred without their (1) negligence, bad faith or willful misconduct or (2) reckless disregard of their obligations and duties under the Advisory Agreement.

7 - Commitments and Contingent Liabilities

In the normal course of business, the Trust may enter into contracts with service providers that contain general indemnification clauses. The Trust’s maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Trust that have not yet occurred.

8 - Financial Highlights

The following financial highlights relate to investment performance and operations for a Share outstanding for the three months and six months ended June 30, 2018 and 2017.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Net asset value per Share, beginning of period	$	16.63		$	14.81		$	16.32		$	15.62
Net investment income (loss)(a)		0.03			(0.00	)(b)		0.05			(0.02	)
Net realized and unrealized gain (loss)(c)		1.27			(0.85	)		1.56			(1.64	)
Net increase (decrease) in net assets from operations		1.30			(0.85	)		1.61			(1.66	)
Net asset value per Share, end of period	$	17.93		$	13.96		$	17.93		$	13.96
Total return, at net asset value(d)(e)		7.82	%		(5.74	)%		9.87	%		(10.63	)%
Ratio to average net assets:
Net investment income (loss)(f)		0.80	%		(0.12	)%		0.64	%		(0.24	)%
Expenses(f)		0.85	%		0.87	%		0.85	%		0.87	%

(a)	Based on average Shares outstanding during the period.
(b)	Rounds to less than $0.01.
(c)	The amounts reported for a Share outstanding may not accord with the change in aggregate gains and losses on investments for each period due to the timing of Trust Share transactions in relation to the fluctuating fair values of the Trust’s underlying investments.
(d)	Based on the change in net asset value of a Share during the period.
(e)	Percentage is not annualized.
(f)	Percentage is annualized.

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9 - Investing in Index Futures

Substantially all of the Trust’s assets are invested in Index Futures. The Index Futures’ settlement value at expiration is based on the value of the S&P GSCI‑ER at that time. Therefore, the value of the Trust will fluctuate based upon the value of the S&P GSCI-ER and the prices of futures contracts and commodities underlying the S&P GSCI-ER. The commodities markets have historically been extremely volatile. For the six months ended June 30, 2018 and the year ended December 31, 2017, the average month-end notional amounts of open Index Futures were $1,448,194,045 and $1,144,402,412, respectively.

The following table shows the variation margin on open futures contracts, by risk exposure category, on the statements of assets and liabilities as of June 30, 2018 and December 31, 2017:

	Asset Derivatives	Fair Value		Liability Derivatives	Fair Value
June 30, 2018
Commodity contracts	Receivable for variation margin on open futures contracts	$	19,193,406	Payable for variation margin on open futures contracts	$	—
December 31, 2017
Commodity contracts	Receivable for variation margin on open futures contracts	$	5,558,077	Payable for variation margin on open futures contracts	$	—

The following table shows the effect of the open futures contracts, by risk exposure category, on the statements of operations for the three months and six months ended June 30, 2018 and 2017:

	Statements of Operations Location	Net Realized Gain (Loss)			Net Change in Unrealized Appreciation/Depreciation
Three Months Ended June 30, 2018
Commodity contracts	Net realized gain (loss) from futures contracts	$	87,476,140		$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			18,892,760
Three Months Ended June 30, 2017
Commodity contracts	Net realized gain (loss) from futures contracts	$	(90,226,772	)	$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			34,319,883
Six Months Ended June 30, 2018
Commodity contracts	Net realized gain (loss) from futures contracts	$	172,734,880		$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			(42,413,107	)
Six Months Ended June 30, 2017
Commodity contracts	Net realized gain (loss) from futures contracts	$	(126,354,568	)	$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			13,168,498

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10 - Investment Valuation

FASB Accounting Standards Codification Topic 820, Fair Value Measurements and Disclosures, defines fair value as the price the Trust would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. The Trust’s policy is to value its investments at fair value.

Investments in Index Futures are measured at fair value using the last reported CME settlement price for Index Futures.

U.S. Treasury bills are valued at the last available bid price received from independent pricing services. In determining the value of a fixed income investment, pricing services may use certain information with respect to transactions in such investments, quotations from dealers, pricing matrixes, market transactions in comparable investments, various relationships observed in the market between investments and calculated yield measures.

Various inputs are used in determining the fair value of financial instruments. Inputs may be based on independent market data (“observable inputs”) or they may be internally developed (“unobservable inputs”). These inputs are categorized into a disclosure hierarchy consisting of three broad levels for financial reporting purposes. The level of a value determined for a financial instrument within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement in its entirety. The three levels of the fair value hierarchy are as follows:

Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities;

Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability either directly or indirectly, including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not considered to be active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means; and

Level 3 – Unobservable inputs that are unobservable for the asset or liability, including the Trust’s assumptions used in determining the fair value of investments.

Fair value pricing could result in a difference between the prices used to calculate the Trust’s net asset value and the prices used by the Trust’s underlying index, which in turn could result in a difference between the Trust’s performance and the performance of the Trust’s underlying index.

The following table summarizes the value of each of the Trust’s investments by the fair value hierarchy levels as of June 30, 2018 and December 31, 2017:

	Level 1		Level 2		Level 3		Total
June 30, 2018
Futures contracts(a)	$	31,985,378	$	—	$	—	$	31,985,378
U.S. Treasury bills		—		1,439,818,468		—		1,439,818,468
December 31, 2017
Futures contracts(a)	$	74,398,485	$	—	$	—	$	74,398,485
U.S. Treasury bills		—		1,343,654,642		—		1,343,654,642

(a) Shown at the unrealized appreciation (depreciation) on the contracts.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

This information should be read in conjunction with the financial statements and notes to financial statements included in Item 1 of Part I of this Form 10-Q. The discussion and analysis that follows may contain statements that relate to future events or future performance. In some cases, such forward-looking statements can be identified by terminology such as “may,” “should,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “potential” or the negative of these terms or other comparable terminology. None of the Trust, the Sponsor, the Advisor, the Trustee or the Delaware Trustee assumes responsibility for the accuracy or completeness of any forward-looking statements. Except as required by applicable disclosure laws, none of the Trust, the Sponsor, the Advisor, the Trustee or the Delaware Trustee is under a duty to update any of the forward-looking statements to conform such statements to actual results or to a change in expectations or predictions.

Introduction

The iShares S&P GSCI™ Commodity-Indexed Trust (the “Trust”) is a Delaware statutory trust that issues units of beneficial interest (“Shares”) representing fractional undivided beneficial interests in its net assets. The Trust holds long positions in exchange-traded index futures contracts of various expirations, or “Index Futures” on the S&P GSCI™ Excess Return Index (the “S&P GSCI-ER”), together with cash, U.S. Treasury securities or other short-term securities and similar securities that are eligible as margin deposits for the Trust’s Index Futures positions, referred to as “Collateral Assets.” The Index Futures held by the Trust are listed on the Chicago Mercantile Exchange (the “CME”). The Trust seeks to track the results of a fully collateralized investment in futures contracts on an index composed of a diversified group of commodities futures. The Trust seeks to track the investment returns of the S&P GSCI™ Total Return Index (the “Index”) before payment of the Trust’s expenses and liabilities.

iShares Delaware Trust Sponsor LLC, a Delaware limited liability company, is the sponsor of the Trust (the “Sponsor”). BlackRock Institutional Trust Company, N.A. is the “Trustee” of the Trust. The Trust is a commodity pool, as defined in the Commodity Exchange Act (the “CEA”) and the applicable regulations of the Commodity Futures Trading Commission (the “CFTC”), and is operated by the Sponsor, a commodity pool operator registered with the CFTC. BlackRock Fund Advisors (the “Advisor”), an indirect subsidiary of BlackRock, Inc., serves as the commodity trading advisor of the Trust and is registered with the CFTC. The Trust is not an investment company registered under the Investment Company Act of 1940, as amended. The Trust has delegated day-to-day administration of the Trust to the Trustee. The Trustee has delegated certain day-to-day administrative functions of the Trustee to State Street Bank and Trust Company (the “Trust Administrator”). Wilmington Trust Company, a Delaware trust company, serves as the “Delaware Trustee” of the Trust.

The Trust intends to offer Shares on a continuous basis. The Trust issues and redeems Shares only in one or more blocks of 50,000 Shares (“Baskets”). Only institutions that enter into an agreement with the Trust to become “Authorized Participants” may purchase or redeem Baskets, in exchange for Index Futures and Collateral Assets with an aggregate value equal to the net asset value per Share, or “NAV” of the Shares being purchased or redeemed. Owners of beneficial interests in Shares (“Shareholders”) who are not Authorized Participants have no right to redeem their Shares. In order to liquidate their investment in the Shares, Shareholders who are not Authorized Participants must generally sell their Shares in the secondary market, assuming that demand for their Shares exists. The price obtained by the Shareholders for the Shares may be less than the NAV of those Shares.

Shares of the Trust trade on NYSE Arca, Inc. (“NYSE Arca”) under the ticker symbol GSG.

Valuation of Index Futures; Computation of the Trust’s Net Asset Value

The Sponsor has the exclusive authority to determine the net asset value of the Trust and the NAV, which it has delegated to the Trustee under the Trust Agreement. The Trustee determines the net asset value of the Trust and the NAV as of 4:00 p.m. (New York time), on each Business Day on which NYSE Arca is open for regular trading, as soon as practicable after that time. A “Business Day” is a day (1) on which none of the following occurs: (a) NYSE Arca is closed for regular trading, (b) the Exchange is closed for regular trading or (c) the Federal Reserve wire transfer system is closed for cash wire transfers, or (2) that the Trustee determines that it is able to conduct business.

The Trustee values the Trust’s long positions in Index Futures on the basis of that day’s settlement prices for the Index Futures held by the Trust as announced by the applicable Exchange. The value of the Trust’s positions in any particular Index Futures contract equals the product of (1) the number of such Index Futures contracts owned by the Trust, (2) the settlement price of such Index Futures contract on the date of calculation and (3) the multiplier of such Index Futures contract. If there is no announced settlement price for a particular Index Futures contract on a Business Day, the Trustee uses the most recently announced settlement price unless the Trustee, in consultation with the Sponsor, determines that such price is inappropriate as a basis for valuation. The daily settlement price for each Index Futures contract currently held by the Trust is established on each trading day, generally at 2:40 p.m. (New York time), by the CME Group Inc., and its designed contract markets, including the CME, CBOT (Board of Trade of the City of Chicago, Inc.), NYMEX (New York Mercantile Exchange), COMEX and KCBT (the “CME Group”) staff.

The Trustee values all other holdings of the Trust at (1) its current market value, if quotations for such property are readily available or (2) its fair value, as reasonably determined by the Trustee, if the current market value cannot be determined.

Once the value of the Index Futures, Collateral Assets of the Trust and interest earned on the Trust’s Collateral Assets has been determined, the Trustee subtracts all accrued expenses and liabilities of the Trust as of the time of calculation in order to calculate the net asset value of the Trust.

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Once the net asset value of the Trust has been calculated, the Trustee determines the NAV by dividing the net asset value of the Trust by the number of Shares outstanding at the time the calculation is made. Any changes to the NAV that may result from creation and redemption activity are not reflected in the NAV calculations for purposes of the Trust’s operations until the Business Day following the Business Day on which they occur, but are reflected in the Trust’s financial statements as of such first Business Day. Creation and redemption orders received after 2:40 p.m. (New York time) are not deemed to be received, and the related creation or redemption will not be deemed to occur, until the following Business Day. Subject to the approval of the Trustee, Baskets may be created solely for cash, but the related creation orders will be deemed received as of the following Business Day unless received by 10:00 a.m. (New York time). Orders are expected to settle by 11:00 a.m. (New York time) on the Business Day following the Business Day on which such orders are deemed to be received.

Results of Operations

The Quarter Ended June 30, 2018

The Trust’s net asset value increased from $1,436,128,442 at March 31, 2018 to $1,481,700,514 at June 30, 2018. The increase in the Trust’s net asset value resulted primarily from a net increase in net assets resulting from operations. The increase in the Trust’s net asset value was partially offset by a net decrease in the number of outstanding Shares, which fell from 86,350,000 Shares at March 31, 2018 to 82,650,000 Shares at June 30, 2018, a consequence of 900,000 Shares (18 Baskets) being created and 4,600,000 Shares (92 Baskets) being redeemed during the quarter.

The 7.82% increase in the Trust’s NAV from $16.63 at March 31, 2018 to $17.93 at June 30, 2018 is directly related to the 7.62% increase in the settlement price for the Index Futures. The Trust’s NAV increased slightly more than the settlement price for the Index Futures on a percentage basis due to interest income from U.S. Treasury bills.

Net increase in net assets resulting from operations for the quarter was $109,455,498, resulting from a net investment income of $2,913,118 and a net realized and unrealized gain of $106,542,380. For the quarter ended June 30, 2018, the Trust had a net realized and unrealized gain of $173,480 on short-term investments and a net realized and unrealized gain of $106,368,900 on futures contracts. Other than the Sponsor’s fees of $2,722,583 and brokerage commissions and fees of $349,749 the Trust had no expenses during the quarter.

The Six-Month Period Ended June 30, 2018

The Trust’s net asset value increased from $1,393,408,765 at December 31, 2017 to $1,481,700,514, at June 30, 2018. The increase in the Trust’s net asset value resulted primarily from a net increase in net assets resulting from operations. The increase in the Trust’s net asset value was partially offset by a net decrease in the number of outstanding Shares, which fell from 85,400,000 Shares at December 31, 2017 to 82,650,000 Shares at June 30, 2018, a consequence of 6,450,000 Shares (129 Baskets) being created and 9,200,000 Shares (184 Baskets) being redeemed during the period.

The 9.87% increase in the Trust’s NAV from $16.32 at December 31, 2017 to $17.93 at June 30, 2018 is directly related to the 9.60% increase in the settlement price for the Index Futures. The Trust’s NAV increased slightly more than the settlement price for the Index Futures on a percentage basis due to interest income from U.S. Treasury bills.

Net increase in net assets resulting from operations for the period was $135,121,137, resulting from a net investment income of $4,594,862 and a net realized and unrealized gain of $130,526,275. For the six months ended June 30, 2018, the Trust had a net realized and unrealized gain of $204,502 on short-term investments and a net realized and unrealized gain of $130,321,773 on futures contracts. Other than the Sponsor’s fees of $5,385,303 and brokerage commissions and fees of $717,805, the Trust had no expenses during the six months.

Liquidity and Capital Resources

The Trust’s assets as of June 30, 2018 consist of Index Futures and Collateral Assets used to satisfy applicable margin requirements for those Index Futures positions. The Trust does not anticipate any further need for liquidity, because creations and redemptions of Shares generally occur in-kind and ordinary expenses are met by cash on hand. Interest earned on the assets posted as collateral is paid to the Trust and is used to pay the Sponsor’s fees and purchase additional Index Futures and Collateral Assets, or, in the discretion of the Sponsor, distributed to Shareholders. In exchange for a fee based on the net asset value of the Trust, the Sponsor has assumed most of the ordinary expenses incurred by the Trust. In the case of an extraordinary expense and/or insufficient interest income to cover ordinary expenses, however, the Trust could be forced to liquidate its positions in Index Futures and Collateral Assets to pay such expenses. As of June 30, 2018, the market for Index Futures had not developed significant liquidity and the Trust represented substantially all of the long-side open interest in Index Futures. In addition, it is expected that Goldman Sachs & Co. LLC or its accountholders may represent, directly or indirectly, a substantial portion of the short-side interest in such market. The existence of such a limited number of market participants could cause or exacerbate losses to the Trust if the Trust were required to liquidate its Index Futures positions.

The Sponsor is unaware of any other trends, demands, conditions or events that are reasonably likely to result in material changes to the Trust’s liquidity needs.

Because the Trust trades Index Futures, its capital is at risk due to changes in the value of the Index Futures or other assets (market risk) or the inability of counterparties to perform (credit risk).

Market Risk

The Trust holds Index Futures positions and Collateral Assets to satisfy applicable margin requirements on those Index Futures positions. Because of this limited diversification of the Trust’s assets, fluctuations in the value of the Index Futures are expected to directly affect the value of the Shares. The value of the Index Futures is expected to track generally the S&P GSCI-ER, although this correlation may not be exact. The S&P GSCI-ER, in turn, reflects the value of a diversified group of commodities. The Trust’s exposure to market risk will be influenced by a number of factors, including the lack of liquidity of the Index Futures market and activities of other market participants.

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Credit Risk

When the Trust purchases or holds Index Futures, it is exposed to the credit risk of a default by the CME’s clearing house, which serves as the counterparty to each Index Futures position, and of a default by its clearing futures commission merchant. In the case of such a default, the Trust may be unable to recover amounts due to it on its Index Futures positions and Collateral Assets posted as margin. The Trust is also exposed to credit risk as a result of its ownership of U.S. Treasury bills.

Off-Balance Sheet Arrangements and Contractual Obligations

The Trust does not use and is not expected to use special purpose entities to facilitate off-balance sheet financing arrangements. The Trust does not have and is not expected to have loan guarantee arrangements or other off-balance sheet arrangements of any kind other than agreements entered into in the normal course of business, which may include indemnification provisions related to certain risks service providers undertake in performing services that are in the interest of the Trust. While the Trust’s exposure under such indemnification provisions cannot be estimated, these general business indemnifications are not expected to have a material impact on the Trust’s financial position.

Critical Accounting Policies

The financial statements and accompanying notes are prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of these financial statements relies on estimates and assumptions that impact the Trust’s financial position and results of operations. These estimates and assumptions affect the Trust’s application of accounting policies. In addition, please refer to Note 2 to the financial statements of the Trust for further discussion of the Trust’s accounting policies.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Quantitative Disclosure

The Trust is exposed to commodity price risk through the Trust’s holdings of Index Futures. The following table provides information about the Trust’s futures contract positions, which are sensitive to changes in commodity prices. As of June 30, 2018, the Trust’s open Index Futures positions (long) were as follows:

Number of contracts:		55,167
Expiration date:	September 2018
Weighted-average price per contract:	$	261.68
Notional amount (fair value):	$	1,475,606,916

The notional amount is calculated using the settlement price for the Index Futures on the CME on June 29, 2018, which was $267.48 per contract, and the $100 multiplier applicable under the contract terms.

The Trust has non-trading market risk as a result of investing in short-term U.S. Treasury bills and such market risk is expected to be immaterial.

Qualitative Disclosure

As described herein, the Trust seeks to track the results of a fully collateralized investment in futures contracts on an index composed of a diversified group of commodities futures. The Trust seeks to track the investment returns of the Index before payment of the Trust’s expenses and liabilities. The Index itself is intended to reflect the performance of a diversified group of physical commodities, including energy commodities, precious and industrial metal commodities, agricultural commodities and livestock commodities. The Trust obtains this exposure to commodity prices through the Trust’s Index Futures positions. As a result, fluctuations in the value of the Trust’s Index Futures are expected to directly affect the value of the Shares.

The Trust will not engage in any activities designed to obtain a profit from, or ameliorate losses caused by, changes in the level of the Index or the S&P GSCI‑ER, or the value of any Collateral Assets. The Trust’s exposure to market risk may be influenced by a number of factors, including the lack of liquidity of the Index Futures market and activities of other market participants.

Item 4. Controls and Procedures

The duly authorized officers of the Sponsor performing functions equivalent to those a principal executive officer and principal financial officer of the Trust would perform if the Trust had any officers, with the participation of the Trustee, have evaluated the effectiveness of the Trust’s disclosure controls and procedures, and have concluded that the disclosure controls and procedures of the Trust were effective as of the end of the period covered by this report to provide reasonable assurance that information required to be disclosed in the reports that the Trust files or submits under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported, within the time periods specified in the applicable rules and forms, and that it is accumulated and communicated to the duly authorized officers of the Sponsor performing functions equivalent to those a principal executive officer and principal financial officer of the Trust would perform if the Trust had any officers, as appropriate to allow timely decisions regarding required disclosure.

There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures.

There were no changes in the Trust’s internal control over financial reporting that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the Trust’s internal control over financial reporting.

13

PART II – OTHER INFORMATION

Item 1. Legal Proceedings

None.

Item 1A. Risk Factors

There have been no material changes to the Risk Factors last reported under Part I, Item 1A of the registrants’ Annual Report on Form 10-K for the year ended December 31, 2017, filed with the Securities and Exchange Commission on February 28, 2018.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

a) None.

b) Not applicable.

c) 4,600,000 Shares (92 Baskets) were redeemed during the quarter ended June 30, 2018.

Period	Total Number of Shares Redeemed		Average Price Per Share
04/01/18 to 04/30/18		2,050,000	$	17.16
05/01/18 to 05/31/18		1,700,000		17.32
06/01/18 to 06/30/18		850,000		17.40
Total		4,600,000	$	17.27

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

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Item 6. Exhibits

Exhibit No.	Description
3.1	Restated Certificate of Trust of iShares® S&P GSCI™ Commodity-Indexed Trust is incorporated by reference to Exhibit 3.1(i) of registrant’s Current Report on Form 8-K filed on May 9, 2007
4.1	Third Amended and Restated Trust Agreement is incorporated by reference to Exhibit 4.1 of registrant’s Registration Statement No. 333‑193156 filed on January 2, 2014
4.2	Authorized Participant Agreement is incorporated by reference to Exhibit 4.2 of registrant’s Current Report on Form 8-K filed on November 29, 2013
10.1	Investment Advisory Agreement is incorporated by reference to Exhibit 10.1 of registrant’s Registration Statement No. 333-193156 filed on January 2, 2014
10.2	Sublicense Agreement is incorporated by reference to Exhibit 10.2 of registrant’s Registration Statement No. 333-126810 filed on May 26, 2006
10.3	Futures and Options Account Agreement is incorporated by reference to Exhibit 10.3 of registrant’s Registration Statement No. 333-193156 filed on January 2, 2014
10.4	Master Service Agreement is incorporated by reference to Exhibit 10.4 of registrant’s Current Report on Form 8-K filed on March 4, 2013
10.5	Service Module for Custodial Services is incorporated by reference to Exhibit 10.5 of registrant’s Registration statement No. 333-193156 filed on January 2, 2014
10.6	Service Module for Fund Administration and Accounting Services is incorporated by reference to Exhibit 10.6 of registrant’s Registration Statement No. 333-193156 filed on January 2, 2014
10.7	Control Agreement is incorporated by reference to Exhibit 10.7 of registrant’s Post-Effective amendment No. 1 to Registration Statement No. 333‑193156 filed on April 2, 2014
31.1	Certification by Principal Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended
31.2	Certification by Principal Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended
32.1	Certification by Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification by Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

15

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned in the capacities* indicated, thereunto duly authorized.

iShares Delaware Trust Sponsor LLC,

Sponsor of the iShares S&P GSCI™ Commodity-Indexed Trust (registrant)

/s/ Paul Lohrey

Paul Lohrey

Director, President and Chief Executive Officer

(Principal executive officer)

Date: August 6, 2018

/s/ Jack Gee

Jack Gee

Director and Chief Financial Officer

(Principal financial and accounting officer)

Date: August 6, 2018

*     The registrant is a trust and the persons are signing in their respective capacities as officers of iShares Delaware Trust Sponsor LLC, the Sponsor of the registrant.

16

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Paul Lohrey, certify that:

1. I have reviewed this report on Form 10-Q of iShares S&P GSCI™ Commodity-Indexed Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 6, 2018

/s/ Paul Lohrey

Paul Lohrey

President and Chief Executive Officer

(Principal executive officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Jack Gee, certify that:

1. I have reviewed this report on Form 10-Q of iShares S&P GSCI™ Commodity-Indexed Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 6, 2018

/s/ Jack Gee

Jack Gee

Chief Financial Officer

(Principal financial officer)

EX-32.1

Exhibit 32.1

Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of iShares S&P GSCI™ Commodity-Indexed Trust (the “Trust”) on Form 10-Q for the period ended June 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Paul Lohrey, Chief Executive Officer of iShares Delaware Trust Sponsor LLC, the Sponsor of the Trust, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.  The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Trust.

It is not intended that this statement be deemed to be filed for purposes of the Securities Exchange Act of 1934.

Date: August 6, 2018

/s/ Paul Lohrey

Paul Lohrey*

President and Chief Executive Officer

(Principal executive officer)

*     The registrant is a trust and Mr. Lohrey is signing in his capacity as an officer of iShares Delaware Trust Sponsor LLC, the Sponsor of the registrant.

EX-32.2

Exhibit 32.2

Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of iShares S&P GSCI™ Commodity-Indexed Trust (the “Trust”) on Form 10-Q for the period ended June 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jack Gee, Chief Financial Officer of iShares Delaware Trust Sponsor LLC, the Sponsor of the Trust, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.  The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Trust.

It is not intended that this statement be deemed to be filed for purposes of the Securities Exchange Act of 1934.

Date: August 6, 2018

/s/ Jack Gee

Jack Gee*

Chief Financial Officer

(Principal financial officer)

*     The registrant is a trust and Mr. Gee is signing in his capacity as an officer of iShares Delaware Trust Sponsor LLC, the Sponsor of the registrant.

XML

Document And Entity Information	6 Months Ended
	Jun. 30, 2018 shares
Document Information [Line Items]
Entity Registrant Name	iShares S&P GSCI Commodity-Indexed Trust
Entity Central Index Key	0001332174
Trading Symbol	gsg
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)	82,650,000
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Amendment Flag	false

XML

Statements of Assets and Liabilities (Unaudited) - USD ($)		Jun. 30, 2018	Dec. 31, 2017
Assets
Cash		$ 23,579,730	$ 41,786,279
Short-term investments(a)	[1]	1,395,131,529	1,303,307,115
Short-term investments held at the broker (restricted)(b)	[2]	44,686,939	40,347,527
Receivable for capital Shares sold		0	3,263,400
Receivable for variation margin on open futures contracts (Note 9)		19,193,406	5,558,077
Total Assets		1,482,591,604	1,394,262,398
Liabilities
Sponsor’s fees payable		885,577	847,758
Brokerage commissions and fees payable		5,513	5,875
Total Liabilities		891,090	853,633
Commitments and contingent liabilities (Note 7)		0	0
Net Assets		$ 1,481,700,514	$ 1,393,408,765
Shares issued and outstanding(c) (in shares)	[3]	82,650,000	85,400,000
Net asset value per Share (Note 2G) (in dollars per share)		$ 17.93	$ 16.32

[1] Cost of short-term investments: $1,394,953,464 and $1,303,324,809, respectively.

[2] Cost of short-term investments held at the broker (restricted): $44,677,642 and $40,346,355, respectively.

[3] No par value, unlimited amount authorized.

XML

Statements of Assets and Liabilities (Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands	Jun. 30, 2018	Dec. 31, 2017
Cost of short-term investments	$ 1,394,953,464	$ 1,303,324,809
Cost of short-term investments held at brokers (restricted)	$ 44,677,642	$ 40,346,355
Shares, outstanding (in shares)	82,650,000	85,400,000
Shares, par value (in dollars per share)	$ 0	$ 0

XML

Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investment Income
Interest	$ 5,985,450	$ 1,908,967	$ 10,697,970	$ 3,295,771
Total investment income	5,985,450	1,908,967	10,697,970	3,295,771
Expenses
Sponsor’s fees	2,722,583	1,905,690	5,385,303	3,893,578
Brokerage commissions and fees	349,749	311,842	717,805	639,978
Total expenses	3,072,332	2,217,532	6,103,108	4,533,556
Net investment income (loss)	2,913,118	(308,565)	4,594,862	(1,237,785)
Net Realized and Unrealized Gain (Loss)
Short-term investments	(457)	3,899	618	4,972
Futures contracts	87,476,140	(90,226,772)	172,734,880	(126,354,568)
Net realized gain (loss)	87,475,683	(90,222,873)	172,735,498	(126,349,596)
Net change in unrealized appreciation/depreciation on:
Short-term investments	173,937	26,744	203,884	20,106
Futures contracts	18,892,760	34,319,883	(42,413,107)	13,168,498
Net change in unrealized appreciation/depreciation	19,066,697	34,346,627	(42,209,223)	13,188,604
Net realized and unrealized gain (loss)	106,542,380	(55,876,246)	130,526,275	(113,160,992)
Net increase in net assets resulting from operations	$ 109,455,498	$ (56,184,811)	$ 135,121,137	$ (114,398,777)
Net increase (decrease) in net assets per Share (in dollars per share)	$ 1.31	$ (0.79)	$ 1.58	$ (1.61)

XML

Statements of Changes in Net Assets (Unaudited) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Net Assets, Beginning of Period	$ 1,393,408,765	$ 1,035,799,565
Operations:
Net investment income (loss)	4,594,862	(160,492)
Net realized gain	172,735,498	3,413,696
Net change in unrealized appreciation/depreciation	(42,209,223)	77,165,412
Net increase in net assets resulting from operations	135,121,137	80,418,616
Capital Share Transactions:
Contributions for Shares issued	108,095,591	349,609,325
Distributions for Shares redeemed	(154,924,979)	(72,418,741)
Net increase (decrease) in net assets from capital share transactions	(46,829,388)	277,190,584
Increase in net assets	88,291,749	357,609,200
Net Assets, End of Period	$ 1,481,700,514	$ 1,393,408,765
Shares issued and redeemed
Shares issued (in shares)	6,450,000	24,050,000
Shares redeemed (in shares)	(9,200,000)	(4,950,000)
Net increase (decrease) in Shares issued and outstanding (in shares)	(2,750,000)	19,100,000

XML

Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Cash Flows from Operating Activities
Net increase (decrease) in net assets resulting from operations	$ 109,455,498	$ (56,184,811)	$ 135,121,137	$ (114,398,777)	$ 80,418,616
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of short-term investments			(6,548,975,208)	(2,976,796,318)
Sales/maturities of short-term investments			6,463,712,100	2,980,618,506
Accretion of discount			(10,696,216)	(3,294,656)
Net realized (gain) loss on short-term investments	457	(3,899)	(618)	(4,972)
Net change in unrealized appreciation/depreciation on short-term investments	(173,937)	(26,744)	(203,884)	(20,106)
Change in operating assets and liabilities:
Receivable for variation margin on open futures contracts			(13,635,329)	(21,815,333)
Payable for variation margin on open futures contracts			0	(1,187,213)
Sponsor’s fees payable			37,819	(28,614)
Brokerage commissions and fees payable			(362)	(5,726)
Net cash provided by (used in) operating activities			25,359,439	(136,933,209)
Cash Flows from Financing Activities
Contributions for Shares issued			111,358,991	215,476,387
Distributions for Shares redeemed			(154,924,979)	(60,652,732)
Net cash provided by (used in) financing activities			(43,565,988)	154,823,655
Net increase (decrease) in cash and cash equivalents			(18,206,549)	17,890,446
Cash:
Beginning of period, Unrestricted — cash			41,786,279	35,276,938	35,276,938
End of period, Unrestricted — cash	$ 23,579,730	$ 53,167,384	$ 23,579,730	$ 53,167,384	$ 41,786,279

XML

Schedules of Investments (Unaudited)

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Investment Holdings, Schedule of Investments [Text Block]

iShares

S&P

GSCI™

Commodity-Indexed

Trust

Schedules

of

Investments

(Unaudited)

At 

June 30, 

2018

 and 

December 

31,

 

2017

June 30 , 2018
Security Description	Face Amount		Fair Value
U.S. Treasury bills (a)(b) :
1.78% – 1.82% due 07/05/18	$	411,000,000	$	410,943,146
1.67% – 1.80% due 07/12/18		490,000,000		489,771,841
1.79% – 1.84% due 07/19/18		290,000,000		289,762,058
1.93% due 08/23/18		250,000,000		249,341,423
Total U.S. Treasury bills (Cost: $1,439,631,106)				1,439,818,468
Total Investments – 97.17%				1,439,818,468
Other Assets, Less Liabilities – 2.83%				41,882,046
Net Assets – 100.00%			$	1,481,700,514

(a)	A portion of the above United States Treasury bills are posted as margin for the Trust’s Index Futures positions as described in Note 2D.
(b)	Rates shown are discount rates paid at the time of purchase.

As of June 30, 2018, the open S&P GSCI-ER futures contracts were as follows:
Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
55,167	September 2018	$	1,475,606,916	$	31,985,378

December 31, 2017
Security Description	Face Amount		Fair Value
U.S. Treasury bills (a)(b) :
1.17% – 1.20% due 01/04/18	$	116,000,000	$	115,992,693
1.11% – 1.21% due 01/18/18		144,000,000		143,920,719
1.20% due 01/25/18		142,000,000		141,888,412
1.15% due 02/01/18		434,500,000		434,041,811
1.31% due 03/08/18		509,000,000		507,811,007
Total U.S. Treasury bills (Cost: $1,343,671,164)				1,343,654,642
Total Investments – 96.43%				1,343,654,642
Other Assets, Less Liabilities – 3.57%				49,754,123
Net Assets – 100.00%			$	1,393,408,765

(a)	A portion of the above United States Treasury bills are posted as margin for the Trust’s Index Futures positions as described in Note 2D.
(b)	Rates shown are discount rates paid at the time of purchase.

As of December 31, 2017, the open S&P GSCI-ER futures contracts were as follows:
Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
56,905	March 2018	$	1,388,834,811	$	74,398,485

XML

Note 1 - Organization

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Business Description and Basis of Presentation [Text Block]

1

-

Organization

The iShares S&P GSCI™ Commodity-Indexed Trust (the “Trust”) is a Delaware statutory trust that was organized under the laws of the State of Delaware on

July 7, 2006

and commenced operations on

July 10, 2006.

iShares Delaware Trust Sponsor LLC, a Delaware limited liability company, is the sponsor of the Trust (the “Sponsor”). The sole member and manager of the Sponsor is BlackRock Asset Management International Inc., a Delaware corporation. BlackRock Institutional Trust Company, N.A. is the trustee of the Trust (the “Trustee”). The Trust is governed by the Third Amended and Restated Trust Agreement, dated as of

December 31, 2013 (

the “Trust Agreement”), among the Sponsor, the Trustee and Wilmington Trust Company (the “Delaware Trustee”). The Trust issues units of beneficial interest (“Shares”) representing fractional undivided beneficial interests in its net assets.

The Trust holds long positions in exchange-traded index futures contracts of various expirations (“Index Futures”) on the S&P GSCI™ Excess Return Index (“S&P GSCI-ER”). In order to collateralize its Index Futures positions and to reflect the U.S. Treasury component of the S&P GSCI™ Total Return Index (the “Index”), the Trust also holds “Collateral Assets,” which consist of cash, U.S. Treasury securities or other short-term securities and similar securities that are eligible as margin deposits for those Index Futures positions. The Index Futures held by the Trust are listed on the Chicago Mercantile Exchange (the “CME”).

The Trust seeks to track the results of a fully collateralized investment in futures contracts on an index composed of a diversified group of commodities futures. The Trust seeks to track the investment returns of the Index before payment of the Trust’s expenses and liabilities.

The Trust is a commodity pool, as defined in the Commodity Exchange Act (the “CEA”) and the applicable regulations of the Commodity Futures Trading Commission (the “CFTC”), and is operated by the Sponsor, a commodity pool operator registered with the CFTC. The Sponsor is an indirect subsidiary of BlackRock, Inc. (“BlackRock”). BlackRock Fund Advisors (the “Advisor”), an indirect subsidiary of BlackRock, serves as the commodity trading advisor of the Trust and is registered with the CFTC.

The accompanying unaudited financial statements were prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions for Form

10

-Q and the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). In the opinion of management, all material adjustments, consisting only of normal recurring adjustments considered necessary for a fair statement of the interim period financial statements have been made. Interim period results are

not

necessarily indicative of results for a full-year period. These financial statements and the notes thereto should be read in conjunction with the Trust’s financial statements included in its Annual Report on Form 

10‑K

for the year ended

December 31, 2017,

as filed with the SEC on

February 28, 2018.

The Trust qualifies as an investment company for accounting purposes and follows the accounting and reporting guidance under the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic

946,

Financial

Services

–

Investment

Companies

, but is

not

registered, and is

not

required to be registered, as an investment company under the Investment Company Act of

1940,

as amended.

XML

Note 2 - Significant Accounting Policies

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Significant Accounting Policies [Text Block]

2

-

Significant

Accounting

Policies

A. Basis of Accounting

The following significant accounting policies are consistently followed by the Trust in the preparation of its financial statements in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Certain statements and captions in the financial statements for the prior periods have been changed to conform to the current financial statement presentation.

B. Investment in Index Futures

The Trust seeks to track the results of a fully collateralized investment in futures contracts on an index composed of a diversified group of commodities futures, including energy commodities, precious and industrial metal commodities, agricultural commodities and livestock commodities. The Trust seeks to track the investment returns of the Index before payment of the Trust’s expenses and liabilities.

The assets of the Trust consist of Index Futures and cash or other Collateral Assets used to satisfy applicable margin requirements for those Index Futures positions. Index Futures are exchange-traded index futures contracts on the S&P GSCI-ER, and are expected to include contracts of different terms and expirations. The Trust is expected to roll out of existing positions in Index Futures and establish new positions in Index Futures on an ongoing basis. When establishing positions in Index Futures, the Trust is required to deposit cash or other Collateral Assets with the broker as “initial margin.” On a daily basis, the Trust is obligated to pay, or entitled to receive, cash in an amount equal to the change in the daily settlement level of its Index Futures positions. Such payments or receipts are known as variation margin. Variation margin is recorded as unrealized appreciation (depreciation) and, if any, shown as variation margin receivable (or payable) on futures contracts in the Statements of Assets and Liabilities. When an Index Futures contract is closed, the Trust records a realized gain or loss based on the difference between the value of the Index Futures contract at the time it was opened and the value at the time it was closed.

Index Futures are derivative instruments valued at fair value, which the Trustee has determined to be that day’s announced settlement price on the CME or any such other futures exchange listing Index Futures (the “Exchange”). If there is

no

announced settlement price for a particular Index Futures contract on that day, the Trustee will use the most recently announced settlement price unless the Trustee, in consultation with the Sponsor, determines that such price is inappropriate as a basis for valuation. The Trust’s derivatives are

not

designated as hedges, and all changes in the fair value are reflected in the statements of operations.

For futures contracts, counterparty credit risk is mitigated because futures contracts are exchange-traded and the exchange’s clearing house acts as central counterparty to all exchange-traded futures contracts (although customers continue to have credit exposure to the clearing member who holds their account).

Please refer to Note

9

for additional disclosures regarding the Trust’s investments in futures contracts.

C. Cash

The Trust considers cash as currencies deposited in

one

or more bank account.

D. Short-Term Investments

Short-term investments on the statements of assets and liabilities consist principally of short-term fixed income securities with original maturities of

one

year or less. These investments are valued at fair value.

As of

June 30, 2018

and

December 31, 2017,

the Trust had restricted short-term investments held at the broker of

$44,686,939

and

$40,347,527,

respectively, which were posted as margin for the Trust’s Index Futures positions.

E. Securities Transactions and Income Recognition

Securities transactions are accounted for on the trade date. Realized gains and losses on investment transactions are determined using the specific identification method. Interest income, including amortization and accretion of premiums and discounts on debt securities, is recognized daily on the accrual basis.

F. Income Taxes

The Trust is treated as a partnership for federal, state and local income tax purposes.

No

provision for federal, state, and local income taxes has been made in the accompanying financial statements because the Trust is

not

subject to income taxes. Shareholders are individually responsible for their own tax payments on their proportionate share of income, gain, loss, deduction, expense and credit.

The Sponsor has reviewed the tax positions as of

June 30, 2018,

inclusive of the open tax return years, and has determined that

no

provision for income tax is required in the Trust’s financial statements.

G. Calculation of Net Asset Value

The net asset value of the Trust on any given day is obtained by subtracting the Trust’s accrued expenses and other liabilities on that day from the value of (

1

) the Trust’s Index Futures positions and Collateral Assets on that day, (

2

) the interest earned on those assets by the Trust and (

3

) any other assets of the Trust, as of

4:00

p.m. (New York time) that day. The Trustee determines the net asset value per Share (the “NAV”) by dividing the net asset value of the Trust on a given day by the number of Shares outstanding at the time the calculation is made. The NAV is calculated each day on which NYSE Arca, Inc. (“NYSE Arca”) is open for regular trading, as soon as practicable after

4:00

p.m. (New York time).

H. Distributions

Interest and distributions received by the Trust on its assets

may

be used to acquire additional Index Futures and Collateral Assets or, in the discretion of the Sponsor, distributed to shareholders. The Trust is under

no

obligation to make periodic distributions to shareholders.

XML

Note 3 - Offering of the Shares

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

3

-

Offering

of

the

Shares

Shares are issued and redeemed continuously in

one

or more blocks of

50,000

Shares (the “Baskets”) in exchange for Index Futures and cash (or, in the discretion of the Sponsor, other Collateral Assets in lieu of cash). Only registered broker-dealers who have entered into an authorized participant agreement with the Trust (each, an “Authorized Participant”)

may

purchase or redeem Baskets. Individual investors that are

not

Authorized Participants cannot purchase or redeem Shares in direct transactions with the Trust. Authorized Participants

may

redeem their Shares (as well as Shares on behalf of other investors) at any time before

2:40

p.m. (New York time) on any business day in

one

or more Baskets. Redemptions of Shares in exchange for baskets of Index Futures and cash (or, in the discretion of the Sponsor, other Collateral Assets in lieu of cash) are treated as sales for financial statement purposes.

It is possible that, from time to time, BlackRock and/or funds or other accounts managed by the Trustee or an affiliate (collectively, “Affiliates”)

may

purchase and hold Shares of the Trust. Affiliates reserve the right, subject to compliance with applicable law, to sell into the market or redeem Baskets through an Authorized Participant at any time some or all of the Shares of the Trust acquired for their own accounts. A large sale or redemption of Shares of the Trust by Affiliates could significantly reduce the asset size of the Trust, which might have an adverse effect on the Trust and the Shares that remain outstanding. As of

June 30, 2018,

there were

no

affiliated accounts that individually represented

10%

or more ownership of the Trust’s total Shares outstanding.

XML

Note 4 - Trust Expenses

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Expenses [Text Block]

4

-

Trust

Expenses

The Trust is responsible for paying any applicable brokerage commissions and similar transaction fees out of its assets in connection with the roll of Index Futures held by the Trust. These expenses are recorded as brokerage commissions and fees in the statements of operations as incurred.

The Sponsor pays the amounts that would otherwise be considered the ordinary operating expenses, if any, of the Trust. In return, the Sponsor receives an allocation from the Trust that accrues daily at an annualized rate equal to

0.75%

of the net asset value of the Trust, as calculated before deducting fees and expenses based on the value of the Trust’s assets.

The Sponsor has agreed under the Trust Agreement to pay the following administrative, operational and marketing expenses: (

1

) the fees of the Trustee, the Delaware Trustee, the Advisor and their respective agents, (

2

) NYSE Arca listing fees, (

3

) printing and mailing costs, (

4

) audit fees, (

5

) fees for registration of the Shares with the SEC, (

6

) tax reporting costs, (

7

) license fees and (

8

) legal expenses relating to the Trust of up to

$100,000

annually.

XML

Note 5 - Related Parties

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Related Party Transactions Disclosure [Text Block]

5

-

Related

Parties

The Sponsor, the Trustee and the Advisor are considered to be related parties to the Trust. The Trustee’s and Advisor’s fees are paid by the Sponsor and are

not

a separate expense of the Trust.

XML

Note 6 - Indemnification

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Indemnification [Text Block]

6

-

Indemnification

The Trust Agreement provides that the Sponsor and its shareholders, directors, officers, employees, affiliates (as such term is defined under the Securities Act of

1933,

as amended) and subsidiaries and agents shall be indemnified from the Trust and held harmless against any loss, liability, claim, cost, expense or judgment of any kind whatsoever (including the reasonable fees and expenses of counsel) arising out of or in connection with the performance of their obligations under the Trust Agreement or any actions taken in accordance with the provisions of the Trust Agreement and incurred without their (

1

) negligence, bad faith or willful misconduct or (

2

) reckless disregard of their obligations and duties under the Trust Agreement.

The investment advisory agreement (the “Advisory Agreement”) between the Trust and the Advisor provides that the Advisor and its shareholders, directors, officers, employees, affiliates (as such term is defined under the Securities Act of

1933,

as amended) and subsidiaries shall be indemnified from the Trust and held harmless against any loss, liability, cost, expense or judgment (including the reasonable fees and expenses of counsel) arising out of or in connection with the performance of its obligations under the Advisory Agreement or any actions taken in accordance with the provisions of the Advisory Agreement and incurred without their (

1

) negligence, bad faith or willful misconduct or (

2

) reckless disregard of their obligations and duties under the Advisory Agreement.

XML

Note 7 - Commitments and Contingent Liabilities

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Commitments and Contingencies Disclosure [Text Block]

7

-

Commitments

and

Contingent

Liabilities

In the normal course of business, the Trust

may

enter into contracts with service providers that contain general indemnification clauses. The Trust’s maximum exposure under these arrangements is unknown as this would involve future claims that

may

be made against the Trust that have

not

yet occurred.

XML

Note 8 - Financial Highlights

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Financial Highlights [Text Block]

8

-

Financial

Highlights

The following financial highlights relate to investment performance and operations for a Share outstanding for the

three

months and

six

months ended

June 

30,

 

2018

and

2017.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Net asset value per Share, beginning of period	$	16.63		$	14.81		$	16.32		$	15.62
Net investment income (loss) (a)		0.03			(0.00	) (b)		0.05			(0.02	)
Net realized and unrealized gain (loss) (c)		1.27			(0.85	)		1.56			(1.64	)
Net increase (decrease) in net assets from operations		1.30			(0.85	)		1.61			(1.66	)
Net asset value per Share, end of period	$	17.93		$	13.96		$	17.93		$	13.96
Total return, at net asset value (d)(e)		7.82	%		(5.74	)%		9.87	%		(10.63	)%
Ratio to average net assets:
Net investment income (loss) (f)		0.80	%		(0.12	)%		0.64	%		(0.24	)%
Expenses (f)		0.85	%		0.87	%		0.85	%		0.87	%

(a)	Based on average Shares outstanding during the period.
(b)	Rounds to less than $0.01.
(c)	The amounts reported for a Share outstanding may not accord with the change in aggregate gains and losses on investments for each period due to the timing of Trust Share transactions in relation to the fluctuating fair values of the Trust’s underlying investments.
(d)	Based on the change in net asset value of a Share during the period.
(e)	Percentage is not annualized.
(f)	Percentage is annualized.

XML

Note 9 - Investing in Index Futures

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Derivative Instruments and Hedging Activities Disclosure [Text Block]

9

-

Investing

in

Index

Futures

Substantially all of the Trust’s assets are invested in Index Futures. The Index Futures’ settlement value at expiration is based on the value of the S&P GSCI‑ER at that time. Therefore, the value of the Trust will fluctuate based upon the value of the S&P GSCI-ER and the prices of futures contracts and commodities underlying the S&P GSCI-ER. The commodities markets have historically been extremely volatile. For the

six

months ended

June 30, 2018

and the year ended

December 31, 2017,

the average month-end notional amounts of open Index Futures were

$1,448,194,045

and

$1,144,402,412,

respectively.

The following table shows the variation margin on open futures contracts, by risk exposure category, on the statements of assets and liabilities as of

June 

30,

 

2018

and

December 31, 2017:

	Asset Derivatives	Fair Value		Liability Derivatives	Fair Value
June 30 , 2018
Commodity contracts	Receivable for variation margin on open futures contracts	$	19,193,406	Payable for variation margin on open futures contracts	$	—
December 31, 2017
Commodity contracts	Receivable for variation margin on open futures contracts	$	5,558,077	Payable for variation margin on open futures contracts	$	—

The following table shows the effect of the open futures contracts, by risk exposure category, on the statements of operations for the

three

months and

six

 months ended

June 30, 2018

and

2017:

	Statements of Operations Location	Net Realized Gain (Loss)			Net Change in Unrealized Appreciation/Depreciation
Three Months Ended June 30, 2018
Commodity contracts	Net realized gain (loss) from futures contracts	$	87,476,140		$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			18,892,760
Three Months Ended June 30, 2017
Commodity contracts	Net realized gain (loss) from futures contracts	$	(90,226,772	)	$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			34,319,883
Six Months Ended June 30, 2018
Commodity contracts	Net realized gain (loss) from futures contracts	$	172,734,880		$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			(42,413,107	)
Six Months Ended June 30, 2017
Commodity contracts	Net realized gain (loss) from futures contracts	$	(126,354,568	)	$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			13,168,498

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Note 10 - Investment Valuation

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Fair Value Disclosures [Text Block]

10

-

Investment

Valuation

FASB Accounting Standards Codification Topic

820,

Fair

Value

Measurements

and

Disclosures

, defines fair value as the price the Trust would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. The Trust’s policy is to value its investments at fair value.

Investments in Index Futures are measured at fair value using the last reported CME settlement price for Index Futures.

U.S. Treasury bills are valued at the last available bid price received from independent pricing services. In determining the value of a fixed income investment, pricing services

may

use certain information with respect to transactions in such investments, quotations from dealers, pricing matrixes, market transactions in comparable investments, various relationships observed in the market between investments and calculated yield measures.

Various inputs are used in determining the fair value of financial instruments. Inputs

may

be based on independent market data (“observable inputs”) or they

may

be internally developed (“unobservable inputs”). These inputs are categorized into a disclosure hierarchy consisting of

three

broad levels for financial reporting purposes. The level of a value determined for a financial instrument within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement in its entirety. The

three

levels of the fair value hierarchy are as follows:

Level 1  – Unadjusted quoted prices in active markets for identical assets or liabilities;

Level 2  – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability either directly or indirectly, including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not considered to be active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means; and

Level 3  – Unobservable inputs that are unobservable for the asset or liability, including the Trust’s assumptions used in determining the fair value of investments.

Fair value pricing could result in a difference between the prices used to calculate the Trust’s net asset value and the prices used by the Trust’s underlying index, which in turn could result in a difference between the Trust’s performance and the performance of the Trust’s underlying index.

The following table summarizes the value of each of the Trust’s investments by the fair value hierarchy levels as of

June 30, 2018

and

December 31, 2017:

	Level 1		Level 2		Level 3		Total
June 30 , 2018
Futures contracts (a)	$	31,985,378	$	—	$	—	$	31,985,378
U.S. Treasury bills		—		1,439,818,468		—		1,439,818,468
December 31, 2017
Futures contracts (a)	$	74,398,485	$	—	$	—	$	74,398,485
U.S. Treasury bills		—		1,343,654,642		—		1,343,654,642

(a) Shown at the unrealized appreciation (depreciation) on the contracts.

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Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Basis of Accounting, Policy [Policy Text Block]

A. Basis of Accounting

The following significant accounting policies are consistently followed by the Trust in the preparation of its financial statements in conformity with U.S. GAAP. The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Certain statements and captions in the financial statements for the prior periods have been changed to conform to the current financial statement presentation.

Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges [Policy Text Block]

B. Investment in Index Futures

The Trust seeks to track the results of a fully collateralized investment in futures contracts on an index composed of a diversified group of commodities futures, including energy commodities, precious and industrial metal commodities, agricultural commodities and livestock commodities. The Trust seeks to track the investment returns of the Index before payment of the Trust’s expenses and liabilities.

The assets of the Trust consist of Index Futures and cash or other Collateral Assets used to satisfy applicable margin requirements for those Index Futures positions. Index Futures are exchange-traded index futures contracts on the S&P GSCI-ER, and are expected to include contracts of different terms and expirations. The Trust is expected to roll out of existing positions in Index Futures and establish new positions in Index Futures on an ongoing basis. When establishing positions in Index Futures, the Trust is required to deposit cash or other Collateral Assets with the broker as “initial margin.” On a daily basis, the Trust is obligated to pay, or entitled to receive, cash in an amount equal to the change in the daily settlement level of its Index Futures positions. Such payments or receipts are known as variation margin. Variation margin is recorded as unrealized appreciation (depreciation) and, if any, shown as variation margin receivable (or payable) on futures contracts in the Statements of Assets and Liabilities. When an Index Futures contract is closed, the Trust records a realized gain or loss based on the difference between the value of the Index Futures contract at the time it was opened and the value at the time it was closed.

Index Futures are derivative instruments valued at fair value, which the Trustee has determined to be that day’s announced settlement price on the CME or any such other futures exchange listing Index Futures (the “Exchange”). If there is

no

announced settlement price for a particular Index Futures contract on that day, the Trustee will use the most recently announced settlement price unless the Trustee, in consultation with the Sponsor, determines that such price is inappropriate as a basis for valuation. The Trust’s derivatives are

not

designated as hedges, and all changes in the fair value are reflected in the statements of operations.

For futures contracts, counterparty credit risk is mitigated because futures contracts are exchange-traded and the exchange’s clearing house acts as central counterparty to all exchange-traded futures contracts (although customers continue to have credit exposure to the clearing member who holds their account).

Please refer to Note

9

for additional disclosures regarding the Trust’s investments in futures contracts.

Cash and Cash Equivalents, Policy [Policy Text Block]

C. Cash

The Trust considers cash as currencies deposited in

one

or more bank account.

Investment, Policy [Policy Text Block]

D. Short-Term Investments

Short-term investments on the statements of assets and liabilities consist principally of short-term fixed income securities with original maturities of

one

year or less. These investments are valued at fair value.

As of

June 30, 2018

and

December 31, 2017,

the Trust had restricted short-term investments held at the broker of

$44,686,939

and

$40,347,527,

respectively, which were posted as margin for the Trust’s Index Futures positions.

Securities Transactions Income and Expense Recognition [Policy Text Block]

E. Securities Transactions and Income Recognition

Securities transactions are accounted for on the trade date. Realized gains and losses on investment transactions are determined using the specific identification method. Interest income, including amortization and accretion of premiums and discounts on debt securities, is recognized daily on the accrual basis.

Income Tax, Policy [Policy Text Block]

F. Income Taxes

The Trust is treated as a partnership for federal, state and local income tax purposes.

No

provision for federal, state, and local income taxes has been made in the accompanying financial statements because the Trust is

not

subject to income taxes. Shareholders are individually responsible for their own tax payments on their proportionate share of income, gain, loss, deduction, expense and credit.

The Sponsor has reviewed the tax positions as of

June 30, 2018,

inclusive of the open tax return years, and has determined that

no

provision for income tax is required in the Trust’s financial statements.

Calculation of Net Asset Value [Policy Text Block]

G. Calculation of Net Asset Value

The net asset value of the Trust on any given day is obtained by subtracting the Trust’s accrued expenses and other liabilities on that day from the value of (

1

) the Trust’s Index Futures positions and Collateral Assets on that day, (

2

) the interest earned on those assets by the Trust and (

3

) any other assets of the Trust, as of

4:00

p.m. (New York time) that day. The Trustee determines the net asset value per Share (the “NAV”) by dividing the net asset value of the Trust on a given day by the number of Shares outstanding at the time the calculation is made. The NAV is calculated each day on which NYSE Arca, Inc. (“NYSE Arca”) is open for regular trading, as soon as practicable after

4:00

p.m. (New York time).

Distributions [Policy Text Block]

H. Distributions

Interest and distributions received by the Trust on its assets

may

be used to acquire additional Index Futures and Collateral Assets or, in the discretion of the Sponsor, distributed to shareholders. The Trust is under

no

obligation to make periodic distributions to shareholders.

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Schedules of Investments (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Investment [Table Text Block]

June 30 , 2018
Security Description	Face Amount		Fair Value
U.S. Treasury bills (a)(b) :
1.78% – 1.82% due 07/05/18	$	411,000,000	$	410,943,146
1.67% – 1.80% due 07/12/18		490,000,000		489,771,841
1.79% – 1.84% due 07/19/18		290,000,000		289,762,058
1.93% due 08/23/18		250,000,000		249,341,423
Total U.S. Treasury bills (Cost: $1,439,631,106)				1,439,818,468
Total Investments – 97.17%				1,439,818,468
Other Assets, Less Liabilities – 2.83%				41,882,046
Net Assets – 100.00%			$	1,481,700,514

December 31, 2017
Security Description	Face Amount		Fair Value
U.S. Treasury bills (a)(b) :
1.17% – 1.20% due 01/04/18	$	116,000,000	$	115,992,693
1.11% – 1.21% due 01/18/18		144,000,000		143,920,719
1.20% due 01/25/18		142,000,000		141,888,412
1.15% due 02/01/18		434,500,000		434,041,811
1.31% due 03/08/18		509,000,000		507,811,007
Total U.S. Treasury bills (Cost: $1,343,671,164)				1,343,654,642
Total Investments – 96.43%				1,343,654,642
Other Assets, Less Liabilities – 3.57%				49,754,123
Net Assets – 100.00%			$	1,393,408,765

Schedule of Derivative Instruments [Table Text Block]

As of June 30, 2018, the open S&P GSCI-ER futures contracts were as follows:
Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
55,167	September 2018	$	1,475,606,916	$	31,985,378

As of December 31, 2017, the open S&P GSCI-ER futures contracts were as follows:
Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
56,905	March 2018	$	1,388,834,811	$	74,398,485

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Note 8 - Financial Highlights (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Financial Highlights [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Net asset value per Share, beginning of period	$	16.63		$	14.81		$	16.32		$	15.62
Net investment income (loss) (a)		0.03			(0.00	) (b)		0.05			(0.02	)
Net realized and unrealized gain (loss) (c)		1.27			(0.85	)		1.56			(1.64	)
Net increase (decrease) in net assets from operations		1.30			(0.85	)		1.61			(1.66	)
Net asset value per Share, end of period	$	17.93		$	13.96		$	17.93		$	13.96
Total return, at net asset value (d)(e)		7.82	%		(5.74	)%		9.87	%		(10.63	)%
Ratio to average net assets:
Net investment income (loss) (f)		0.80	%		(0.12	)%		0.64	%		(0.24	)%
Expenses (f)		0.85	%		0.87	%		0.85	%		0.87	%

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Note 9 - Investing in Index Futures (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

	Asset Derivatives	Fair Value		Liability Derivatives	Fair Value
June 30 , 2018
Commodity contracts	Receivable for variation margin on open futures contracts	$	19,193,406	Payable for variation margin on open futures contracts	$	—
December 31, 2017
Commodity contracts	Receivable for variation margin on open futures contracts	$	5,558,077	Payable for variation margin on open futures contracts	$	—

Derivative Instruments, Gain (Loss) [Table Text Block]

	Statements of Operations Location	Net Realized Gain (Loss)			Net Change in Unrealized Appreciation/Depreciation
Three Months Ended June 30, 2018
Commodity contracts	Net realized gain (loss) from futures contracts	$	87,476,140		$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			18,892,760
Three Months Ended June 30, 2017
Commodity contracts	Net realized gain (loss) from futures contracts	$	(90,226,772	)	$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			34,319,883
Six Months Ended June 30, 2018
Commodity contracts	Net realized gain (loss) from futures contracts	$	172,734,880		$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			(42,413,107	)
Six Months Ended June 30, 2017
Commodity contracts	Net realized gain (loss) from futures contracts	$	(126,354,568	)	$	—
	Net change in unrealized appreciation/depreciation on futures contracts		—			13,168,498

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Note 10 - Investment Valuation (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block]

	Level 1		Level 2		Level 3		Total
June 30 , 2018
Futures contracts (a)	$	31,985,378	$	—	$	—	$	31,985,378
U.S. Treasury bills		—		1,439,818,468		—		1,439,818,468
December 31, 2017
Futures contracts (a)	$	74,398,485	$	—	$	—	$	74,398,485
U.S. Treasury bills		—		1,343,654,642		—		1,343,654,642

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Schedules of Investments (Unaudited) - Investments (Details) - USD ($)		Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. Treasury bills, fair value		$ 1,439,818,468	$ 1,343,654,642
Other Assets, Less Liabilities		41,882,046	49,754,123
Net Assets		1,481,700,514	1,393,408,765	$ 1,035,799,565
United States Treasury Bills 1.78% - 1.82% Due 07/05/18 [Member]
U.S. Treasury bills, face amount	[1],[2]	411,000,000
U.S. Treasury bills, fair value	[1],[2]	410,943,146
United States Treasury Bills 1.17% - 1.20% Due 01/04/18 [Member]
U.S. Treasury bills, face amount	[1],[2]		116,000,000
U.S. Treasury bills, fair value	[1],[2]		115,992,693
United States Treasury Bills 1.67% - 1.80% Due 07/12/18 [Member]
U.S. Treasury bills, face amount	[1],[2]	490,000,000
U.S. Treasury bills, fair value	[1],[2]	489,771,841
United States Treasury Bills 1.11% - 1.21% Due 01/18/18 [Member]
U.S. Treasury bills, face amount	[1],[2]		144,000,000
U.S. Treasury bills, fair value	[1],[2]		143,920,719
United States Treasury Bills 1.79% - 1.84% Due 07/19/18 [Member]
U.S. Treasury bills, face amount	[1],[2]	290,000,000
U.S. Treasury bills, fair value	[1],[2]	289,762,058
United States Treasury Bills 1.20% Due 01/25/18 [Member]
U.S. Treasury bills, face amount	[1],[2]		142,000,000
U.S. Treasury bills, fair value	[1],[2]		141,888,412
United States Treasury Bills 1.15% Due 02/01/18 [Member]
U.S. Treasury bills, face amount	[1],[2]		434,500,000
U.S. Treasury bills, fair value	[1],[2]		434,041,811
United States Treasury Bills 1.93% Due 08/23/18 [Member]
U.S. Treasury bills, face amount	[1],[2]	250,000,000
U.S. Treasury bills, fair value	[1],[2]	249,341,423
United States Treasury Bills 1.31% Due 03/08/18 [Member]
U.S. Treasury bills, face amount	[1],[2]		509,000,000
U.S. Treasury bills, fair value	[1],[2]		507,811,007
US Treasury Bill Securities [Member]
U.S. Treasury bills, fair value	[1],[2]	$ 1,439,818,468	$ 1,343,654,642

[1] A portion of the above United States Treasury bills are posted as margin for the Trust's Index Futures positions as described in Note 2D.

[2] Rates shown are discount rates paid at the time of purchase.

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Schedules of Investments (Unaudited) - Investments (Details) (Parentheticals) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Cost of short-term investments	$ 1,394,953,464	$ 1,303,324,809
Percentage of net asset value	97.17%	96.43%
Liabilities percentage of net asset value	2.83%	3.57%
Total percentage of net asset value	100.00%	100.00%
United States Treasury Bills 1.78% - 1.82% Due 07/05/18 [Member]
U.S. Treasury bills, due date	Jul. 05, 2018
United States Treasury Bills 1.78% - 1.82% Due 07/05/18 [Member] | Minimum [Member]
U.S. Treasury bills, effective rate	1.78%
United States Treasury Bills 1.78% - 1.82% Due 07/05/18 [Member] | Maximum [Member]
U.S. Treasury bills, effective rate	1.82%
United States Treasury Bills 1.17% - 1.20% Due 01/04/18 [Member]
U.S. Treasury bills, due date		Jan. 04, 2018
United States Treasury Bills 1.17% - 1.20% Due 01/04/18 [Member] | Minimum [Member]
U.S. Treasury bills, effective rate		1.17%
United States Treasury Bills 1.17% - 1.20% Due 01/04/18 [Member] | Maximum [Member]
U.S. Treasury bills, effective rate		1.20%
United States Treasury Bills 1.67% - 1.80% Due 07/12/18 [Member]
U.S. Treasury bills, due date	Jul. 12, 2018
United States Treasury Bills 1.67% - 1.80% Due 07/12/18 [Member] | Minimum [Member]
U.S. Treasury bills, effective rate	1.67%
United States Treasury Bills 1.67% - 1.80% Due 07/12/18 [Member] | Maximum [Member]
U.S. Treasury bills, effective rate	1.80%
United States Treasury Bills 1.11% - 1.21% Due 01/18/18 [Member]
U.S. Treasury bills, due date		Jan. 18, 2018
United States Treasury Bills 1.11% - 1.21% Due 01/18/18 [Member] | Minimum [Member]
U.S. Treasury bills, effective rate		1.11%
United States Treasury Bills 1.11% - 1.21% Due 01/18/18 [Member] | Maximum [Member]
U.S. Treasury bills, effective rate		1.21%
United States Treasury Bills 1.79% - 1.84% Due 07/19/18 [Member]
U.S. Treasury bills, due date	Jul. 19, 2018
United States Treasury Bills 1.79% - 1.84% Due 07/19/18 [Member] | Minimum [Member]
U.S. Treasury bills, effective rate	1.79%
United States Treasury Bills 1.79% - 1.84% Due 07/19/18 [Member] | Maximum [Member]
U.S. Treasury bills, effective rate	1.84%
United States Treasury Bills 1.20% Due 01/25/18 [Member]
U.S. Treasury bills, effective rate		1.20%
U.S. Treasury bills, due date		Jan. 25, 2018
United States Treasury Bills 1.15% Due 02/01/18 [Member]
U.S. Treasury bills, effective rate		1.15%
U.S. Treasury bills, due date		Feb. 01, 2018
United States Treasury Bills 1.93% Due 08/23/18 [Member]
U.S. Treasury bills, effective rate	1.93%
U.S. Treasury bills, due date	Aug. 23, 2018
United States Treasury Bills 1.31% Due 03/08/18 [Member]
U.S. Treasury bills, effective rate		1.31%
U.S. Treasury bills, due date		Mar. 08, 2018
US Treasury Bill Securities [Member]
Cost of short-term investments	$ 1,439,631,106	$ 1,343,671,164

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Schedules of Investments (Unaudited) - Open S&P GSCI ER Index Futures Contracts (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Number of contracts	55,167	56,905
Expiration date	September 2018	March 2018
Current notional amount	$ 1,475,606,916	$ 1,388,834,811
Net unrealized appreciation	$ 31,985,378	$ 74,398,485

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Note 2 - Significant Accounting Policies (Details Textual) - USD ($)		Jun. 30, 2018	Dec. 31, 2017
Deposits with Clearing Organizations and Others, Securities	[1]	$ 44,686,939	$ 40,347,527

[1] Cost of short-term investments held at the broker (restricted): $44,677,642 and $40,346,355, respectively.

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Note 3 - Offering of the Shares (Details Textual)	Jun. 30, 2018 shares
Shares Prescribed Aggregation	50,000

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Note 4 - Trust Expenses (Details Textual)	6 Months Ended
	Jun. 30, 2018 USD ($)
Sponsors Fee Annualized Accrual Rate Based on Net Asset Value of Trust	0.75%
Maximum [Member]
Legal Fees Per Year Maximum	$ 100,000

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Note 8 - Financial Highlights - Net Asset Value and Financial Highlights (Details) - $ / shares		3 Months Ended			6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Net asset value per Share, beginning of period (in dollars per share)		$ 16.63	$ 14.81		$ 16.32	$ 15.62
Net investment income (loss)(a) (in dollars per share)	[1]	0.03	0	[2]	0.05	(0.02)
Net realized and unrealized gain (loss)(c) (in dollars per share)	[3]	1.27	(0.85)		1.56	(1.64)
Net increase (decrease) in net assets from operations (in dollars per share)		1.30	(0.85)		1.61	(1.66)
Net asset value per Share, end of period (in dollars per share)		$ 17.93	$ 13.96		$ 17.93	$ 13.96
Total return, at net asset value(d)(e)	[4],[5]	7.82%	(5.74%)		9.87%	(10.63%)
Ratio to average net assets:
Net investment income (loss)(f)	[6]	0.80%	(0.12%)		0.64%	(0.24%)
Expenses(f)	[6]	0.85%	0.87%		0.85%	0.87%

[1] Based on average Shares outstanding during the period.

[2] Rounds to less than $0.01.

[3] The amounts reported for a Share outstanding may not accord with the change in aggregate gains and losses on investments for each period due to the timing of Trust Share transactions in relation to the fluctuating fair values of the Trust's underlying investments.

[4] Based on the change in net asset value of a Share during the period.

[5] Percentage is not annualized.

[6] Percentage is annualized.

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Note 9 - Investing in Index Futures (Details Textual) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Average Month-End Notional Amount of Derivative Contracts	$ 1,448,194,045	$ 1,144,402,412

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Note 9 - Investing in Index Futures - Effect of the Futures Contracts, by Risk Exposure Category, on the Statements of Financial Condition (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Receivable for variation margin on open futures contracts (Note 9)	$ 19,193,406	$ 5,558,077
Commodity Contract [Member] | Receivable for Variation Margin on Open Futures Contracts [Member]
Receivable for variation margin on open futures contracts (Note 9)	19,193,406	5,558,077
Commodity Contract [Member] | Payable for Variation Margin on Open Futures Contracts [Member]
Payable for variation margin on open futures contracts	$ 0	$ 0

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Note 9 - Investing in Index Futures - Effect of the Futures Contracts, by Risk Exposure Category, on the Statements of Operations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net realized gain (loss) from futures contracts	$ 87,476,140	$ (90,226,772)	$ 172,734,880	$ (126,354,568)
Net change in unrealized appreciation/depreciation on futures contracts	18,892,760	34,319,883	(42,413,107)	13,168,498
Commodity Contract [Member] | Net Realized Gain Loss from Futures Contracts [Member]
Net realized gain (loss) from futures contracts	87,476,140	(90,226,772)	172,734,880	(126,354,568)
Net change in unrealized appreciation/depreciation on futures contracts	0	0	0	0
Commodity Contract [Member] | Net Change in Unrealized Appreciation Depreciation on Futures Contracts [Member]
Net realized gain (loss) from futures contracts	0	0	0	0
Net change in unrealized appreciation/depreciation on futures contracts	$ 18,892,760	$ 34,319,883	$ (42,413,107)	$ 13,168,498

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Note 10 - Investment Valuation - Valuation of the Trust's Investments by the Fair Value Hierarchy (Details) - USD ($)		Jun. 30, 2018	Dec. 31, 2017
Futures [Member]
Investment, fair value	[1]	$ 31,985,378	$ 74,398,485
US Treasury Bill Securities [Member]
Investment, fair value		1,439,818,468	1,343,654,642
Fair Value, Inputs, Level 1 [Member] | Futures [Member]
Investment, fair value	[1]	31,985,378	74,398,485
Fair Value, Inputs, Level 1 [Member] | US Treasury Bill Securities [Member]
Investment, fair value		0	0
Fair Value, Inputs, Level 2 [Member] | Futures [Member]
Investment, fair value	[1]	0	0
Fair Value, Inputs, Level 2 [Member] | US Treasury Bill Securities [Member]
Investment, fair value		1,439,818,468	1,343,654,642
Fair Value, Inputs, Level 3 [Member] | Futures [Member]
Investment, fair value	[1]	0	0
Fair Value, Inputs, Level 3 [Member] | US Treasury Bill Securities [Member]
Investment, fair value		$ 0	$ 0

[1] Shown at the unrealized appreciation (depreciation) on the contracts.