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Fees and Related Party Transactions (Tables)
6 Months Ended
Jun. 30, 2017
Fees and Related Party Transactions [Abstract]  
Sponsor Fees
The Sponsor Fee is payable monthly in arrears calculated as of the last business day of each month in the same manner as the Advisory Fee.

Period
 
Class 0
  
Class 2
 
       
For the period from January 1, 2016 through March 31, 2017
  
0.75
%
  
2.75
%
For the period from April 1, 2017 through June 30, 2017
  
0.75
%
  
1.50
%