iSHARES COMMODITY OPTIMIZED TRUST 10-K 28 Feb 14 2013 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'iShares Dow Jones-UBS Roll Select Commodity Index Trust	'
Document Type	'10-K	'
Current Fiscal Year End Date	'--12-31	'
Entity Common Stock, Shares Outstanding	250,000	'
Entity Public Float	'	$0
Amendment Flag	'false	'
Entity Central Index Key	'0001535365	'
Entity Current Reporting Status	'Yes	'
Entity Voluntary Filers	'No	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Well-known Seasoned Issuer	'No	'
Document Period End Date	31-Dec-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'FY	'

Statement_of_Financial_Conditi

Statement of Financial Condition (USD $)	Dec. 31, 2013
Current Assets	'
Cash and cash equivalents	$51,845
Cash and cash equivalents held at brokers (restricted)	445,000
Short-term investments(a)	12,224,010	[1]
Total Assets	12,720,855
Current Liabilities	'
Payable for variation margin on open futures contracts (Note 9)	118,719
Sponsor’s fees payable	7,543
Total Liabilities	126,262
Commitments and Contingent Liabilities (Note 7)	'
Shareholders’ Capital	'
Redeemable capital Shares, no par value, unlimited amount authorized (at redemption value) – 250,000 issued and outstanding at December 31, 2013	12,594,593
Total Shareholders’ Capital	12,594,593
Total Liabilities and Shareholders’ Capital	$12,720,855
[1]	Cost of short-term investments at December 31, 2013: $12,224,010.

Statement_of_Financial_Conditi1

Statement of Financial Condition (Parentheticals) (USD $)	Dec. 31, 2013
Cost of Short-term investments (in Dollars)	$12,224,010	[1]
Redeemable capital Shares, par value (in Dollars per share)	'
Redeemable capital Shares issued	250,000
Redeemable capital Shares outstanding	250,000
[1]	Cost of short-term investments at December 31, 2013: $12,224,010.

Statement_of_Operations

Statement of Operations (USD $)	5 Months Ended
	Dec. 31, 2013
Investment Income	'
Interest	$957
Total investment income	957
Expenses	'
Sponsor’s fees	19,456
Brokerage commissions and fees	3,828
Total expenses	23,284
Net investment loss	-22,327
Realized and Unrealized Gain (Loss)	'
Net realized gain on short-term investments	187
Net realized gain on futures contracts	174,717
Net change in unrealized appreciation/depreciation on futures contracts	-25,016
Net realized and unrealized gain	149,888
Net gain	$127,561
Net gain per Share (in Dollars per share)	$0.98
Weighted-average Shares outstanding (in Shares)	130,479

Statement_of_Changes_in_Shareh

Statement of Changes in Shareholders’ Capital (USD $)	5 Months Ended
	Dec. 31, 2013
Shareholders’ Capital, Beginning of Period	$0
Shareholders’ Capital, End of Period	12,594,593
Net Asset Value per Share, End of Period (in Dollars per share)	$50.38
Contributions	12,467,032
Net investment loss	-22,327
Net realized gain on short-term investments	187
Net realized gain on futures contracts	174,717
Net change in unrealized appreciation/depreciation on futures contracts	($25,016)

Statement_of_Cash_Flows

Statement of Cash Flows (USD $)	5 Months Ended
	Dec. 31, 2013
Cash Flows from Operating Activities	'
Net gain	$127,561
Adjustments to reconcile net gain to net cash used in operating activities:	'
Purchases of short-term investments	-22,172,760
Sales/maturities of short-term investments	9,949,894
Accretion of discount	-957
Net realized gain on short-term investments	-187
Change in operating assets and liabilities:	'
Cash and cash equivalents held at brokers (restricted)	-445,000
Payable for variation margin on open futures contracts	118,719
Sponsor’s fees payable	7,543
Net cash used in operating activities	-12,415,187
Cash Flows from Financing Activities	'
Contributions	12,467,032
Net cash provided by financing activities	12,467,032
Net increase in cash and cash equivalents	51,845
Cash and Cash Equivalents	'
Beginning of period	0
End of period	$51,845

Schedule_of_Investments

Schedule of Investments	5 Months Ended
	Dec. 31, 2013
Schedule of Investments [Abstract]	'
Investment Holdings, Schedule of Investments [Text Block]	'
	iShares® Dow Jones-UBS Roll Select Commodity Index Trust
	Schedule of Investments
	At December 31, 2013
		Face Amount		Security Description		Fair Value
				United States Treasury bills:
		$	150,000	0.03% due 01/09/14		$	149,999
			4,500,000	0.02% due 02/20/14			4,499,881
			7,575,000	0.04% - 0.07% due 03/06/14			7,574,130
				Total United States Treasury bills – 97.06%(a)		$	12,224,010
	(a)	Percentage is based on shareholders’ capital.
	As of December 31, 2013, open futures contracts held by the Trust were as follows:
	Number of Contracts		Expiration Date	Current Notional Amount				Net Unrealized Depreciation
	424		Mar-14	$	12,570,328			$	25,016

Note_1_Organization

Note 1 - Organization	5 Months Ended
	Dec. 31, 2013
Disclosure Text Block [Abstract]	'
Business Description and Basis of Presentation [Text Block]	'
	1 - Organization
	The iShares® Dow Jones-UBS Roll Select Commodity Index Trust (the “Trust”) is a Delaware statutory trust organized under the laws of the State of Delaware on December 7, 2011 and commenced operations on August 8, 2013. 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 Trust is governed by the First Amended and Restated Trust Agreement, dated as of July 29, 2013 (the “Trust Agreement”), among the Sponsor, the Trustee and Wilmington Trust, National Association (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, or “Index Futures” on the Dow Jones-UBS Roll Select Commodity Index (the “DJ-UBS Roll Select CI”). In order to collateralize its Index Future positions and to reflect the U.S. Treasury component of the Dow Jones-UBS Roll Select Commodity Index Total Return (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 Future positions. The Index Futures held by the Trust are listed on the Chicago Mercantile Exchange (the “CME”).
	It is the objective of the Trust that the performance of the Shares will correspond generally, but will not necessarily be identical, to the performance of the Index, which reflects the return on a fully collateralized investment in the DJ-UBS Roll Select CI, 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 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.

Note_2_Summary_of_Significant_

Note 2 - Summary of Significant Accounting Policies	5 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Significant Accounting Policies [Text Block]	'
	2 - Summary of Significant Accounting Policies
	A.	Basis of Accounting
	The following is a summary of significant accounting policies consistently followed by the Trust in the preparation of its financial statements in conformity with accounting principles generally accepted in the United States of America (“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 and these differences could be material.
	B.	Investment in Index Futures
	The investment objective of the Trust is to seek investment results that will correspond generally, but will not necessarily be identical, to the performance of the Index before payment of the Trust’s expenses and liabilities, through holdings of long positions in Index Futures and related Collateral Assets.
	The assets of the Trust consist of Index Futures and cash or other Collateral Assets used to satisfy applicable margin requirements for those Index Future positions. Index Futures are exchange-traded index future contracts on the DJ-UBS Roll Select CI, 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 and recorded as unrealized appreciation or depreciation. When an Index Future is closed, the Trust records a realized gain or loss based on the difference between the value of the Index Future 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 CME settlement price. If there is no announced settlement price for a particular Index Future 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 Statement 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 and Cash Equivalents
	The Trust considers cash and cash equivalents to be highly liquid investments with original maturities of three months or less.
	As of December 31, 2013, the Trust had cash and cash equivalents held at brokers of $445,000, which were posted as margin for the Trust’s Index Future positions.
	D.	Short-Term Investments
	Short-term investments on the Statement of Financial Condition consist principally of short-term fixed income securities with original maturities of one year or less. These investments are valued at fair value.
	E.	Securities Transactions, Income and Expense Recognition
	Securities transactions are accounted for on the trade date. Realized gains and losses on investment transactions are determined using the specific identification method. Other income and expenses are recognized 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 December 31, 2013 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 Future 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.
	I.	Recent Accounting Standard
	In June 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2013-08, Amendments to the Scope, Measurement, and Disclosure Requirements (“ASU 2013-08”). ASU 2013-08 provides guidance to assess whether an entity is an investment company, and gives additional measurement and disclosure requirements for an investment company. ASU 2013-08 is effective for the Trust for fiscal years beginning after December 15, 2013, and interim periods within those fiscal years. Management is evaluating the impact of this guidance on the Trust’s financial statements.

Note_3_Offering_of_the_Shares

Note 3 - Offering of the Shares	5 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
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 in exchange for Index Futures and cash (or, in the discretion of the Sponsor, other Collateral Assets in lieu of cash). Individual investors that are not Authorized Participants cannot purchase or redeem Shares in direct transactions with the Trust. The Trust transacts only with registered broker-dealers that have entered into a contractual arrangement with the Trust and the Sponsor governing, among other matters, the creation and redemption of Shares (such authorized broker-dealers are the “Authorized Participants”). 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 blocks of 50,000 Shares. 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.

Note_4_Trust_Expenses

Note 4 - Trust Expenses	5 Months Ended
	Dec. 31, 2013
ExpensesTextBlockAbstract	'
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 Statement 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 Securities and Exchange Commission (“SEC”), (6) tax reporting costs, (7) license fees and (8) legal expenses relating to the Trust of up to $100,000 annually.

Note_5_Related_Parties

Note 5 - Related Parties	5 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
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.

Note_6_Indemnification

Note 6 - Indemnification	5 Months Ended
	Dec. 31, 2013
Indemnification [Abstract]	'
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 shall be indemnified from the Trust and held harmless against any loss, liability or expense 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 between the Trust and the Advisor provides that the Advisor and its shareholders, directors, officers, employees, affiliates (as such term is defined in Rule 405 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 Investment Advisory Agreement or any actions taken in accordance with the provisions of the Investment Advisory Agreement and incurred without their (1) negligence, bad faith or willful misconduct or (2) reckless disregard of their obligations and duties under the Investment Advisory Agreement.

Note_7_Commitments_and_Conting

Note 7 - Commitments and Contingent Liabilities	5 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
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.

Note_8_Financial_Highlights

Note 8 - Financial Highlights	5 Months Ended
	Dec. 31, 2013
Financial Highlights [Abstract]	'
Financial Highlights [Text Block]	'
	8 - Financial Highlights
	The Trust is presenting the following financial highlights related to investment performance and operations for the period from August 8, 2013 (commencement of operations) to December 31, 2013. The net investment income (loss) and total expense ratios are calculated using average net assets. The net asset value presentation is calculated using daily Shares outstanding. The net investment income (loss) and expense ratios for the period from August 8, 2013 (commencement of operations) to December 31, 2013 have been annualized. The total return is based on the change in the net asset value of a Share during the period.
			Period from
			August 8, 2013 (Commencement of Operations) to December 31, 2013
	Net asset value per Share, beginning of period		$	50
	Net investment loss			(0.17	)
	Net realized and unrealized gain			0.55
	Net increase in net assets from operations			0.38
	Net asset value per Share, end of period		$	50.38
	Total return, at net asset value(b)			0.76	%
	Ratio to average net assets:
	Net investment loss(a)			(0.85	)%
	Expenses(a)			0.89	%
	(a)	Percentage is annualized.
	(b)	Percentage is not annualized.

Note_9_Investing_in_Index_Futu

Note 9 - Investing in Index Futures	5 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
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 DJ-UBS Roll Select CI at that time. Therefore, the value of the Trust will fluctuate based upon the value of the Index and the prices of futures contracts and commodities underlying the Index. The commodities markets have historically been extremely volatile. For the period from August 8, 2013 (commencement of operations) to December 31, 2013, the average month-end notional amount of open Index Futures was $6,301,988.
	The following table shows the variation margin on open futures contracts, by risk exposure category, on the Statement of Financial Condition as of December 31, 2013:
		Asset Derivatives	Fair Value		Liability Derivatives		Fair Value
	Commodity contracts	Receivable for variation margin on open futures contracts	$	—	Payable for variation margin on open futures contracts		$	118,719
	The following table shows the variation margin on open futures contracts, by risk exposure category, on the Statement of Operations for the period from August 8, 2013 (commencement of operations) to December 31, 2013:
		Statement of	Realized Gain (Loss)			Change in Unrealized Appreciation/Depreciation
		Operations Location
	Commodity contracts	Net realized gain on futures contracts	$	174,717		$	—
		Net change in unrealized appreciation/depreciation on futures contracts		—			(25,016	)

Note_10_Investment_Valuation

Note 10 - Investment Valuation

5 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

'

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 price 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 valuation of the Trust’s investments by the fair value hierarchy levels as of December 31, 2013:

Level 1

Level 2

Level 3

Total

Futures contracts(a)

$

(25,016

)

$

—

$

—

$

(25,016

)

U.S. Treasury bills

—

12,224,010

—

12,224,010

(a)

Futures contracts are valued at unrealized appreciation (depreciation).

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	5 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Basis of Accounting, Policy [Policy Text Block]	'
	A.	Basis of Accounting
	The following is a summary of significant accounting policies consistently followed by the Trust in the preparation of its financial statements in conformity with accounting principles generally accepted in the United States of America (“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 and these differences could be material.
Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges [Policy Text Block]	'
	B.	Investment in Index Futures
	The investment objective of the Trust is to seek investment results that will correspond generally, but will not necessarily be identical, to the performance of the Index before payment of the Trust’s expenses and liabilities, through holdings of long positions in Index Futures and related Collateral Assets.
	The assets of the Trust consist of Index Futures and cash or other Collateral Assets used to satisfy applicable margin requirements for those Index Future positions. Index Futures are exchange-traded index future contracts on the DJ-UBS Roll Select CI, 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 and recorded as unrealized appreciation or depreciation. When an Index Future is closed, the Trust records a realized gain or loss based on the difference between the value of the Index Future 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 CME settlement price. If there is no announced settlement price for a particular Index Future 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 Statement 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 and Cash Equivalents
	The Trust considers cash and cash equivalents to be highly liquid investments with original maturities of three months or less.
	As of December 31, 2013, the Trust had cash and cash equivalents held at brokers of $445,000, which were posted as margin for the Trust’s Index Future positions.
Investment, Policy [Policy Text Block]	'
	D.	Short-Term Investments
	Short-term investments on the Statement of Financial Condition consist principally of short-term fixed income securities with original maturities of one year or less. These investments are valued at fair value.
Securities Transactions Income And Expense Recognition [Policy Text Block]	'
	E.	Securities Transactions, Income and Expense Recognition
	Securities transactions are accounted for on the trade date. Realized gains and losses on investment transactions are determined using the specific identification method. Other income and expenses are recognized 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 December 31, 2013 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 Future 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.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	I.	Recent Accounting Standard
	In June 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2013-08, Amendments to the Scope, Measurement, and Disclosure Requirements (“ASU 2013-08”). ASU 2013-08 provides guidance to assess whether an entity is an investment company, and gives additional measurement and disclosure requirements for an investment company. ASU 2013-08 is effective for the Trust for fiscal years beginning after December 15, 2013, and interim periods within those fiscal years. Management is evaluating the impact of this guidance on the Trust’s financial statements.

Note_8_Financial_Highlights_Ta

Note 8 - Financial Highlights (Tables)	5 Months Ended
	Dec. 31, 2013
Financial Highlights [Abstract]	'
Financial Highlights [Table Text Block]	'
		Period from
		August 8, 2013 (Commencement of Operations) to December 31, 2013
	Net asset value per Share, beginning of period	$	50
	Net investment loss		(0.17	)
	Net realized and unrealized gain		0.55
	Net increase in net assets from operations		0.38
	Net asset value per Share, end of period	$	50.38
	Total return, at net asset value(b)		0.76	%
	Ratio to average net assets:
	Net investment loss(a)		(0.85	)%
	Expenses(a)		0.89	%

Note_9_Investing_in_Index_Futu1

Note 9 - Investing in Index Futures (Tables)	5 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	'
		Asset Derivatives	Fair Value		Liability Derivatives		Fair Value
	Commodity contracts	Receivable for variation margin on open futures contracts	$	—	Payable for variation margin on open futures contracts		$	118,719
Derivative Instruments, Gain (Loss) [Table Text Block]	'
		Statement of	Realized Gain (Loss)			Change in Unrealized Appreciation/Depreciation
		Operations Location
	Commodity contracts	Net realized gain on futures contracts	$	174,717		$	—
		Net change in unrealized appreciation/depreciation on futures contracts		—			(25,016	)

Note_10_Investment_Valuation_T

Note 10 - Investment Valuation (Tables)	5 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block]	'
		Level 1			Level 2		Level 3		Total
	Futures contracts(a)	$	(25,016	)	$	—	$	—	$	(25,016	)
	U.S. Treasury bills		—			12,224,010		—		12,224,010

Schedule_of_Investments_Detail

Schedule of Investments (Details) - Investments (USD $)	Dec. 31, 2013
Schedule of Investments (Details) - Investments [Line Items]	'
	$12,224,010
United States Treasury Bills 0.03% Due 1/09/14 [Member]	'
Schedule of Investments (Details) - Investments [Line Items]	'
United States Treasury bills, face value	150,000
United States Treasury bills, fair value	149,999
United States Treasury Bills 0.02 % Due 2/20/14 [Member]	'
Schedule of Investments (Details) - Investments [Line Items]	'
United States Treasury bills, face value	4,500,000
United States Treasury bills, fair value	4,499,881
United States Treasury Bills 0.04-0.07% Due 3/06/14 [Member]	'
Schedule of Investments (Details) - Investments [Line Items]	'
United States Treasury bills, face value	7,575,000
United States Treasury bills, fair value	$7,574,130

Schedule_of_Investments_Detail1

Schedule of Investments (Details) - Investments (Parentheticals)	5 Months Ended
	Dec. 31, 2013
Schedule of Investments (Details) - Investments (Parentheticals) [Line Items]	'
United States Treasury bills, percentage	97.06%	[1]
United States Treasury Bills 0.03% Due 1/09/14 [Member]	'
Schedule of Investments (Details) - Investments (Parentheticals) [Line Items]	'
United States Treasury bills, effective rate	0.03%
United States Treasury bills, due date	19-Jan-14
United States Treasury Bills 0.02 % Due 2/20/14 [Member]	'
Schedule of Investments (Details) - Investments (Parentheticals) [Line Items]	'
United States Treasury bills, effective rate	0.02%
United States Treasury bills, due date	20-Feb-14
United States Treasury Bills 0.04-0.07% Due 3/06/14 [Member]	'
Schedule of Investments (Details) - Investments (Parentheticals) [Line Items]	'
United States Treasury bills, due date	6-Mar-14
United States Treasury Bills 0.04-0.07% Due 3/06/14 [Member] | Minimum [Member]	'
Schedule of Investments (Details) - Investments (Parentheticals) [Line Items]	'
United States Treasury bills, effective rate	0.04%
United States Treasury Bills 0.04-0.07% Due 3/06/14 [Member] | Maximum [Member]	'
Schedule of Investments (Details) - Investments (Parentheticals) [Line Items]	'
United States Treasury bills, effective rate	0.07%
[1]	Percentage is based on shareholders' capital.

Schedule_of_Investments_Detail2

Schedule of Investments (Details) - Open Futures Contracts (Futures [Member], USD $)	5 Months Ended
	Dec. 31, 2013
Futures [Member]	'
Derivative [Line Items]	'
	424
	'March 2014
	$12,570,328
	$25,016	[1]
[1]	Futures contracts are valued at unrealized appreciation (depreciation).

Note_2_Summary_of_Significant_1

Note 2 - Summary of Significant Accounting Policies (Details) (USD $)	Dec. 31, 2013
Accounting Policies [Abstract]	'
Margin Deposit Assets	$445,000

Note_3_Offering_of_the_Shares_

Note 3 - Offering of the Shares (Details)	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Redeemable Capital Shares Prescribed Aggregation	50,000

Note_4_Trust_Expenses_Details

Note 4 - Trust Expenses (Details) (USD $)	5 Months Ended
	Dec. 31, 2013
Note 4 - Trust Expenses (Details) [Line Items]	'
Sponsors Fee Annualized Accrual Rate Based on Net Asset Value of Trust	0.75%
Maximum [Member]	'
Note 4 - Trust Expenses (Details) [Line Items]	'
Legal Fees Per Year (in Dollars)	$100,000

Note_8_Financial_Highlights_De

Note 8 - Financial Highlights (Details) - Net Asset Value and Financial Highlights (USD $)	5 Months Ended
	Dec. 31, 2013
Net Asset Value and Financial Highlights [Abstract]	'
Net asset value per Share, beginning of period	$50
Net increase in net assets from operations	$0.38
Net asset value per Share, end of period	$50.38
Total return, at net asset value(b)	0.76%	[1]
Net investment loss(a)	-0.85%	[2]
Expenses(a)	0.89%	[2]
Net investment loss	($0.17)
Net realized and unrealized gain	$0.55
[1]	Percentage is not annualized.
[2]	Percentage is annualized.

Note_9_Investing_in_Index_Futu2

Note 9 - Investing in Index Futures (Details) (USD $)	5 Months Ended
	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Average Month End Notional Amount Of Derivative Contracts	$6,301,988

Note_9_Investing_in_Index_Futu3

Note 9 - Investing in Index Futures (Details) - Effect of the Futures Contracts, by Risk Exposure Category, on the Statement of Financial Condition (Commodity Contract [Member], Payable for Variation Margin on Open Futures Contracts [Member], USD $)	Dec. 31, 2013
Commodity Contract [Member] | Payable for Variation Margin on Open Futures Contracts [Member]	'
Derivatives, Fair Value [Line Items]	'
Commodity contracts	$118,719

Note_9_Investing_in_Index_Futu4

Note 9 - Investing in Index Futures (Details) - Effect of the Futures Contracts, by Risk Exposure Category, on the Statement of Operations (USD $)	5 Months Ended
	Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]	'
Realized gain (loss)	$174,717
Change in unrealized appreciation/depreciation	-25,016
Net Realized Gain On Futures Contracts [Member] | Commodity Contract [Member]	'
Derivative Instruments, Gain (Loss) [Line Items]	'
Realized gain (loss)	174,717
Net Change in Unrealized Appreciation/Depreciation on Futures [Member] | Commodity Contract [Member]	'
Derivative Instruments, Gain (Loss) [Line Items]	'
Change in unrealized appreciation/depreciation	($25,016)

Note_10_Investment_Valuation_D

Note 10 - Investment Valuation (Details) - Valuation of the Trustbs Investments by the Fair Value Hierarchy (USD $)	Dec. 31, 2013
Futures [Member] | Fair Value, Inputs, Level 1 [Member]	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'
Investments, fair value	($25,016)	[1]
Futures [Member]	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'
Investments, fair value	-25,016	[1]
US Treasury Bill Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'
Investments, fair value	12,224,010
US Treasury Bill Securities [Member]	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'
Investments, fair value	$12,224,010
[1]	Futures contracts are valued at unrealized appreciation (depreciation).