Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Investments, All Other Investments [Abstract]

Net Unrealized Gains (Losses) on Open Contracts and Longest Contract Maturities

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
	$		$			$
Sep. 30, 2015		3,434,920		(79,383	)		3,355,537	Dec. 2017	Dec. 2015
Dec. 31, 2014		5,966,628		495,854			6,462,482	Mar. 2019	Mar. 2015