Financial Highlights

3 Months Ended

Mar. 31, 2014

Disclosure Text Block Supplement [Abstract]

Additional Financial Information Disclosure [Text Block]

(9)  Financial Highlights

The following financial highlights show the Trust’s financial performance of the Trading units for the three month periods ended March 31, 2014 and March 31, 2013.  Total return is calculated as the change in a theoretical beneficial owner’s investment over the entire period, and is not annualized.  Total return is calculated based on the aggregate return of the Trust’s Trading units taken as a whole.

	Class A						Class B
	Three months ended						Three months ended
	March 31,						March 31,
	2014			2013			2014			2013
Per share operating performance:
Net asset value of Trading units, beginning of period	$	71.25		$	76.92		$	78.74		$	83.34
Total Trading income (loss):
Trading gain (loss)		(6.65	)		0.56			(7.35	)		0.60
Investment income		0.01			0.05			0.02			0.06
Expenses		(1.80	)		(1.73	)		(1.64	)		(1.47	)
Trading income (loss)		(8.44	)		(1.12	)		(8.97	)		(0.81	)
Net asset value of Trading units, end of period	$	62.81		$	75.80		$	69.77		$	82.53
Total return:
Total return before incentive fees		(11.85	%)		(1.45	%)		(11.40	%)		(0.97	%)
Less incentive fee allocations		(0.00	%)		0.00	%		0.00	%		0.00	%
Total return		(11.85	%)		(1.45	%)		(11.40	%)		(0.97	%)
Ratios to average net assets:
Trading income (loss)		(12.91	%)		(1.44	%)		(13.39	%)		(1.00	%)
Expenses:
Expenses, less incentive fees		(2.75	%)		(2.28	%)		(2.36	%)		(1.87	%)
Incentive fees		(0.00	%)		0.00	%		(0.00	%)		0.00	%
Total expenses		(2.75	%)		(2.28	%)		(2.36	%)		(1.87	%)

The calculations above do not include activity within the Trust’s Non-Trading Accounts.

The net income and expense ratios are computed based upon the weighted average net assets for the Trust for the periods ended March 31, 2014 and 2013, respectively.  The amounts are not annualized.