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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
6 Months Ended
Jun. 30, 2018
Fair Value Of Financial Instruments [Abstract]  
Valuation of Securities Using the Fair Value Hierarchy
The following table summarizes the valuation of UNL’s securities at June 30, 2018 using the fair value hierarchy:
 
At June 30, 2018
 
Total
  
Level I
  
Level II
  
Level III
 
Short-Term Investments $5,579,382  $5,579,382  $  $ 
Exchange-Traded Futures Contracts                
United States Contracts  14,279   14,279       
  
The following table summarizes the valuation of UNL’s securities at December 31, 2017 using the fair value hierarchy:
 
At December 31, 2017
 
Total
  
Level I
  
Level II
  
Level III
 
Short-Term Investments $7,683,698  $7,683,698  $  $ 
Exchange-Traded Futures Contracts                
United States Contracts  (568,922)  (568,922)      
Fair Value of Derivative Instruments
Fair Value of Derivative Instruments
 
Derivatives not
Accounted for
as Hedging
Instruments
 
Condensed
Statements of
Financial
Condition Location
 
Fair Value
At June 30,
2018
  
Fair Value
At December 31,
2017
 
Futures - Commodity Contracts
 Assets $14,279  $(568,922)
Effect of Derivative Instruments on the Condensed Statements of Operations
The Effect of Derivative Instruments on the Condensed Statements of Operations
 
    
For the six months ended
June 30, 2018
  
For the six months ended
June 30, 2017
 
Derivatives not
Accounted for
as Hedging
Instruments
 
Location of
Gain (Loss)
on Derivatives
Recognized in
Income
 
Realized
Gain (Loss)
on Derivatives
Recognized in
Income
  
Change in
Unrealized
Gain (Loss) on
Derivatives
Recognized in
Income
  
Realized
Gain (Loss)
on Derivatives
Recognized in
Income
  
Change in
Unrealized
Gain (Loss) on
Derivatives
Recognized in
Income
 
Futures - Commodity Contracts
 Realized gain (loss) on
closed positions
 $(424,071)     $656,563     
                   
  Change in unrealized
gain (loss) on open
positions
     $583,201      $(3,109,473)