Statements of Financial Condition(USD ($))
Apr. 30, 2013
Oct. 31, 2012
Current Assets:    
Swiss Franc deposits, interest bearing $ 290,913,690 $ 333,082,495
Swiss Franc deposits, non-interest bearing      
Total Current Assets 290,913,690 333,082,495
Current Liabilities:    
Accrued Sponsor's fee 100,553 114,158
Accrued interest expense   139
Total Current Liabilities 100,553 114,297
Commitments and Contingent Liabilities (note 8)      
Redeemable Capital Shares, at redemption value, no par value, 29,500,000 authorized - 2,750,000 and 3,150,000 issued and outstanding, respectively 290,813,137 332,968,198
Shareholders' Equity:    
Retained Earnings      
Cumulative Translation Adjustment      
Total Liabilities, Redeemable Capital Shares and Shareholders' Equity $ 290,913,690 $ 333,082,495