Condensed Schedule of Investments (USD $)	Sep. 30, 2012		Dec. 31, 2011
United States Treasury bills
Treasury Bill, Face Value	$ 2,500,000	[1]	$ 4,000,000	[2]
Treasury Bill, Fair Value	1,999,915		3,999,691
Treasury Bill, Percent of Net Assets	46.03%		75.84%
Futures Contracts
Futures contract held long - Agriculture, Fair Value	50,542		504
Futures contract held long - Agriculture, Percent of Net Assets	1.16%		0.01%
Futures contract held long - Energy, Fair Value	(5,155)		6,260
Futures contract held long - Energy, Percent of Net Assets	(0.12%)		0.12%
Futures contract held long - Currency, Fair Value	(6,823)		62,269
Futures contract held long - Currency, Percent of Net Assets	(0.16%)		1.18%
Futures contract held long - Indices, Fair Value	(15,866)
Futures contract held long - Indices, Percent of Net Assets	(0.37%)
Futures contract held long - Interest Rates, Fair Value	7,178
Futures contract held long - Interest Rates, Percent of Net Assets	0.17%
Futures contract held long - Metals, Fair Value	99,695
Futures contract held long - Metals, Percent of Net Assets	2.30%
Total futures contracts held long, Fair Value	129,571		69,033
Total futures contracts held long, Percent of Net Assets	2.98%		1.31%
Futures contracts held short - Agriculture, Fair Value	(6,870)		(6,388)
Futures contracts held short - Agriculture, Percent of Net Assets	(0.16%)		(0.12%)
Futures contract held short - Energy, Fair Value			53,130
Futures contract held short - Energy, Percent of Net Assets			1.01%
Futures contract held short - Currency, Fair Value			(1,975)
Futures contract held short - Currency, Percent of Net Assets			(0.04%)
Futures contract held long - Indices, Fair Value	(1,507)
Futures contract held long - Indices, Percent of Net Assets	(0.03%)
Futures contract held long - Interest Rates, Fair Value	(32,037)
Futures contract held long - Interest Rates, Percent of Net Assets	(0.74%)
Futures contract held long - Metals, Fair Value	(50,305)
Futures contract held long - Metals, Percent of Net Assets	(1.16%)
Total futures contracts held short, Fair Value	(90,719)		44,767
Total futures contracts held short, Percent of Net Assets	(2.09%)		0.85%
Net unrealized (loss) on open futures contracts, Fair Value	38,852		113,800
Net unrealized (loss) on open futures contracts, Percent of Net Assets	$ 0.89%		$ 2.16%

[1] October 2012 (cost $1,999,520)

[2] Matures January 2012 (cost $3,986,110)