Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 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 September 30, 2017
	Asset		Liability
Type of	Derivatives		Derivatives			Net
Futures Contracts	Fair Value		Fair Value			Fair Value
Agriculture	$	11,634	$	(623	)	$	11,011
Currency		10,112		(6,295	)		3,817
Energy		5,427		(1,897	)		3,530
Indices		54,259		(8,735	)		45,524
Interest rates		18,806		(389	)		18,417
Metals		14,445		-			14,445
	$	114,683	$	(17,939	)	$	96,744

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

Trading gain (loss) for the following periods:

	Nine Months Ended September 30,
Type of Futures Contracts	2017			2016
Agriculture	$	(155,812	)	$	222,679
Currency		135,347			(14,698	)
Energy		(346,956	)		(66,462	)
Indices		387,174			115,184
Interest rates		(353,769	)		334,005
Metals		(10,258	)		(23,315	)
	$	(344,274	)	$	567,393

	Three Months Ended September 30,
Type of Futures Contracts	2017			2016
Agriculture	$	(147,178	)	$	88,163
Currency		21,531			(78,068	)
Energy		(46,378	)		(1,999	)
Indices		25,029			124,288
Interest rates		(20,829	)		(207,307	)
Metals		42,157			(51,916	)
	$	(125,668	)	$	(126,839	)