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Statements of Assets and Liabilities (Unaudited) (Parentheticals) - USD ($)
$ / shares in Thousands
Jun. 30, 2017
Dec. 31, 2016
Investment in gold bullion, cost $ 8,277,677,317 $ 7,706,923,343
Shares, par value (in dollars per share) $ 0 $ 0
Shares, issued (in shares) 703,100,000 655,000,000