Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Derivatives not designated as hedging instruments:

As of June 30, 2017
	Asset		Liability
Type of	Derivatives		Derivatives			Net
Futures Contracts	Fair Value		Fair Value			Fair Value
Agriculture	$	9,650	$	(5,040	)	$	4,610
Currency		21,361		-			21,361
Energy		-		(57,101	)		(57,101	)
Indices		6,690		(2,165	)		4,525
Interest rates		11,777		(4,175	)		7,602
Metals		7,520		-			7,520
	$	56,998	$	(68,481	)	$	(11,483	)

Schedule of Derivative Instruments Included in Trading Activities [Table Text Block]

Trading gain (loss) for the following periods:

	Six Months Ended June 30,
Type of Futures Contracts	2017			2016
Agriculture	$	(8,634	)	$	134,516
Currency		113,816			63,370
Energy		(300,578	)		(64,464	)
Indices		362,145			(9,103	)
Interest rates		(332,940	)		541,312
Metals		(52,415	)		28,601
	$	(218,606	)	$	694,232

	Three Months Ended June 30,
Type of Futures Contracts		2017			2016
Agriculture	$	(15,441	)	$	163,133
Currency		105,845			8,489
Energy		(150,546	)		(165,325	)
Indices		(14,564	)		(297,904	)
Interest rates		(147,750	)		330,221
Metals		(54,605	)		17,432
	$	(277,061	)	$	56,046