000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Statements of Assets and Liabilities (Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Statements of Assets and Liabilities (Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Statements of Operations (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Statements of Changes in Net Assets (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Schedules of Investments (Unaudited) link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 1 - Organization link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 2 - Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 3 - Offering of the Shares link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 4 - Trust Expenses link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 5 - Related Parties link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 6 - Indemnification link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 7 - Commitments and Contingent Liabilities link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 8 - Financial Highlights link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 9 - Investing in Index Futures link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 10 - Investment Valuation link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Schedules of Investments (Unaudited) (Tables) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 8 - Financial Highlights (Tables) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 9 - Investing in Index Futures (Tables) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 10 - Investment Valuation (Tables) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Schedules of Investments (Unaudited) - Investments (Details) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Schedules of Investments (Unaudited) - Investments (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Schedules of Investments (Unaudited) - Open S&P GSCI ER Index Futures Contracts (Details) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Schedules of Investments (Unaudited) - Open S&P GSCI ER Index Futures Contracts (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 2 - Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 3 - Offering of the Shares (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 4 - Trust Expenses (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 8 - Financial Highlights - Net Asset Value and Financial Highlights (Details) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 9 - Investing in Index Futures (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 9 - Investing in Index Futures - Effect of the Futures Contracts, by Risk Exposure Category, on the Statements of Financial Condition (Details) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 9 - Investing in Index Futures - Effect of the Futures Contracts, by Risk Exposure Category, on the Statements of Operations (Details) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 10 - Investment Valuation - Valuation of the Trust's Investments by the Fair Value Hierarchy (Details) link:calculationLink link:definitionLink link:presentationLink