Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Financial Instruments [Abstract]

Net Unrealized Gain 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
		$		$		$
Mar. 31, 2013		2,438,664		(495,462	)		1,943,202	Dec. 2016	Jun. 2013
Dec. 31, 2012		2,503,274		48,080			2,551,354	Mar. 2017	Mar. 2013