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Fair Value Measurements
6 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Fair Value Disclosures [Text Block]
(7) Fair Value Measurements

In accordance with the Fair Value Measurements Topic of the Financial Accounting Standards Board Accounting Standards Codification, the Trust established a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the relevant measurement date.  The three levels are defined as follows:

          Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Trust has the ability to access at the measurement date.  An active market for the asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.  The value of the Trust’s exchange-traded futures contracts and options fall into this category.

         Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly.  This category includes forward currency contracts, options on forward currency contracts and fixed income securities that the Trust values using models or other valuation methodologies derived from observable market data.

         Level 3 inputs are unobservable inputs for an asset or liability.  Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date.  As of June 30, 2013 and the year ended December 31, 2012, the Trust did not have any Level 3 assets or liabilities.

An asset or liability’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The valuation hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs for an asset or liability (Level 3).

The Trust’s exchange-traded futures contracts and options on futures contracts are valued based on quoted prices (unadjusted) in active markets for identical assets or liabilities.  The Trust’s forward currency contracts and options on forward currency contracts are based on third-party quoted dealer values on the interbank market, based on similar assets or liabilities.  The Trust’s fixed income securities are valued using inputs that are observable for the asset or liability, including prices of similar fixed income securities or present values of expected future cash flow models.

At June 30, 2013, the Trust held a non-controlling interest in a non-affiliated limited liability company – the Global Diversified Managed Futures Portfolio, LLC (the “Global Diversified Portfolio”).  The Global Diversified Portfolio trades primarily in exchange-traded futures contracts and fixed income investments, and maintains daily liquidity.  The Trust obtains details of the individual investment holdings of the Global Diversified Portfolio and verifies fair values independently.  There is no lock-up period and the Trust has no unfunded commitments.  Accordingly, the Trust’s investment in the Global Diversified Portfolio is classified within Level 1 of the valuation hierarchy.

The following table presents the Trust’s fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis as of June 30, 2013 and year ended December 31, 2012, respectively:

   
June 30, 2013
       
   
Level 1
   
Level 2
   
Level 3
   
Total
 
Assets
                       
Unrealized gain on open contracts:
                       
Futures positions
  $ 146,825     $ -     $ -     $ 146,825  
Investment in Global Diversified Managed Futures Portfolio LLC
    982,881       -       -       982,881  
Purchased options on futures contracts
    2,266,543       -       -       2,266,543  
Fixed income securities
    -       11,775,841       -       11,775,841  
Total assets
    3,396,249       11,775,841       -       15,172,090  
                                 
Liabilities
                               
Options written on futures contracts
    3,070,552       -       -       3,070,552  
Total fair value
  $ 325,697     $ 11,775,841     $ -     $ 12,101,538  

   
December 31, 2012
         
   
Level 1
   
Level 2
   
Level 3
   
Total
 
Assets
                               
Unrealized gain on open contracts:
                               
Futures positions
  $ 260,744     $ -     $ -     $ 260,744  
Purchased options on futures contracts
    728,440       -       -       728,440  
Fixed income securities
    -       11,003,681       -       11,003,681  
Total assets
    989,184       11,003,681       -       11,992,865  
                                 
Liabilities
                               
Options written on futures contracts
    884,242       -       -       884,242  
Total fair value
  $ 104,942     $ 11,003,681     $ -     $ 11,108,623