Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Net Unrealized Gains And Losses on Open Contracts, Disclosures [Line Items]

Net Unrealized Gain (Loss) on Open Contracts

The net unrealized gains (losses) on open contracts, reported as a component of "Trading Equity" on the Statements of Financial Condition, and their longest contract maturities were as follows:

	Net Unrealized Gains/(Losses) on Open Contracts			Longest Maturities
Date	Exchange-Traded	Off-Exchange-Traded	Total	Exchange-Traded	Off-Exchange-Traded
	$	$	$
Jun. 30, 2013	(1,534,184)	(441,507)	(1,975,691)	Sep. 2014	Sep. 2013
Dec. 31, 2012	(2,010,679)	905,178	(1,105,501)	Sep. 2014	Mar. 2013