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Concentration of Risk | 6 Months Ended | 12 Months Ended
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Mar. 31, 2018 | Sep. 30, 2017
Concentration of Risk | 5. Concentration of Risk The Fund’s primary business activities are the investment in gold bullion, the gold delivery agreement, and the issuance and sale of Shares. Various factors could affect the price of gold including: (i) global gold supply and demand, which is influenced by such factors as forward selling by gold producers, purchases made by gold producers to unwind gold hedge positions, central bank purchases and sales, and production and cost levels in major gold-producing countries such as China, Australia, South Africa and the United States; (ii) investors’ expectations with respect to the rate of inflation; (iii) currency exchange rates; (iv) interest rates; (v) investment and trading activities of hedge funds and commodity funds; and (vi) global or regional political, economic or financial events and situations. In addition, there is no assurance that gold will maintain its long-term value in terms of purchasing power in the future. In the event that the price of gold declines, the Sponsor expects the value of an investment in the Shares to decline proportionately. Each of these events could have a material effect on the Fund’s financial position and results of operations. | 6. Concentration of Risk The Fund’s primary business activities are the investment in gold bullion, the gold delivery agreement, and the issuance and sale of Shares. Various factors could affect the price of gold, including: (i) global gold supply and demand, which is influenced by such factors as forward selling by gold producers, purchases made by gold producers to unwind gold hedge positions, central bank purchases and sales, and production and cost levels in major gold-producing countries such as China, Australia, South Africa and the United States; (ii) investors’ expectations with respect to the rate of inflation; (iii) currency exchange rates; (iv) interest rates; (v) investment and trading activities of hedge funds and commodity funds; and (vi) global or regional political, economic or financial events and situations. In addition, there is no assurance that gold will maintain its long-term value in terms of purchasing power in the future. In the event that the price of gold declines, the Sponsor expects the value of an investment in the Shares to decline proportionately. Each of these events could have a material effect on the Fund’s financial position and results of operations.
SPDR Long Dollar Gold Trust [Member] |  |
Concentration of Risk | 5. Concentration of Risk The Fund’s primary business activities are the investment in gold bullion, the gold delivery agreement, and the issuance and sale of Shares. Various factors could affect the price of gold including: (i) global gold supply and demand, which is influenced by such factors as forward selling by gold producers, purchases made by gold producers to unwind gold hedge positions, central bank purchases and sales, and production and cost levels in major gold-producing countries such as China, Australia, South Africa and the United States; (ii) investors’ expectations with respect to the rate of inflation; (iii) currency exchange rates; (iv) interest rates; (v) investment and trading activities of hedge funds and commodity funds; and (vi) global or regional political, economic or financial events and situations. In addition, there is no assurance that gold will maintain its long-term value in terms of purchasing power in the future. In the event that the price of gold declines, the Sponsor expects the value of an investment in the Shares to decline proportionately. Each of these events could have a material effect on the Fund’s financial position and results of operations. | 6. Concentration of Risk The Fund’s primary business activities are the investment in gold bullion, the gold delivery agreement, and the issuance and sale of Shares. Various factors could affect the price of gold, including: (i) global gold supply and demand, which is influenced by such factors as forward selling by gold producers, purchases made by gold producers to unwind gold hedge positions, central bank purchases and sales, and production and cost levels in major gold-producing countries such as China, Australia, South Africa and the United States; (ii) investors’ expectations with respect to the rate of inflation; (iii) currency exchange rates; (iv) interest rates; (v) investment and trading activities of hedge funds and commodity funds; and (vi) global or regional political, economic or financial events and situations. In addition, there is no assurance that gold will maintain its long-term value in terms of purchasing power in the future. In the event that the price of gold declines, the Sponsor expects the value of an investment in the Shares to decline proportionately. Each of these events could have a material effect on the Fund’s financial position and results of operations.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -URI http://asc.fasb.org/topic&trid=2134479 + Details
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