Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities measured on recurring basis

At March 31, 2014
	Level 1		Level 2		Total
Equity in broker trading accounts:
Net unrealized gain on open futures contracts*	$	12,066,277	$	—	$	12,066,277
Net unrealized gain on open forward currency contracts*		—		4,458,030		4,458,030
Cash and cash equivalents:
Money market fund		13,492,541		—		13,492,541
Investments in securities:
U.S. Treasury securities*		64,041,413		—		64,041,413
Commercial paper*		—		65,614,198		65,614,198
Corporate notes*		—		322,764,643		322,764,643
Certificates of deposit*		—		29,484,942		29,484,942
Total	$	89,600,231	$	422,321,813	$	511,922,044

*See the consolidated condensed schedule of investments for further description.

At December 31, 2013
	Level 1		Level 2		Total
Equity in broker trading accounts:
Net unrealized gain on open futures contracts*	$	37,958,108	$	—	$	37,958,108
Net unrealized gain on open forward currency contracts*		—		695,075		695,075
Cash and cash equivalents:
Money market fund		6,338,530		—		6,338,530
Investments in securities:
U.S. Treasury securities*		88,102,079		—		88,102,079
Commercial paper*		—		65,153,483		65,153,483
Corporate notes*		—		377,666,684		377,666,684
Certificates of deposit*		—		42,625,053		42,625,053
Total	$	132,398,717	$	486,140,295	$	618,539,012

 *See the consolidated condensed schedule of investments for further description.