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Statements of Financial Condition (Parenthetical) (USD $)
Apr. 30, 2011
Oct. 31, 2010
Statements of Financial Condition    
Redeemable Capital Shares, no par value    
Redeemable Capital Shares, shares authorized 67,000,000 67,000,000
Redeemable Capital Shares, shares issued 2,600,000 2,800,000
Redeemable Capital Shares, shares outstanding 2,600,000 2,800,000