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Statements Of Financial Condition (Parenthetical) (USD $)
Apr. 30, 2012
Oct. 31, 2011
Statements Of Financial Condition [Abstract]    
Redeemable capital shares, par value      
Redeemable capital shares, shares authorized 43,870,000 38,870,000
Redeemable capital shares, shares issued 1,750,000 5,200,000
Redeemable capital shares, shares outstanding 1,750,000 5,200,000