STATEMENTS OF FINANCIAL CONDITION (Unaudited) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Trading Equity:
Unrestricted cash	$ 299,177,457	$ 362,360,920
Restricted cash	21,342,474	39,088,853
Total cash	320,519,931	401,449,773
Net unrealized gain on open contracts (MS&Co.)	8,020,207	19,046,952
Net unrealized gain on open contracts (MSIP)	3,179,181	756,215
Total net unrealized gain on open contracts	11,199,388	19,803,167
Total Trading Equity	331,719,319	421,252,940
Interest receivable (MSSB)	223	26,871
Total Assets	331,719,542	421,279,811
Liabilities:
Redemptions payable	3,162,498	7,999,594
Accrued brokerage fees (MS&Co.)	1,689,387	1,972,489
Accrued management fees	520,535	751,806
Accrued incentive fee	0	1,305,062
Total Liabilities	5,372,420	12,028,951
Partners' Capital:
Limited Partners (9,556,760.210 and 10,646,418.942 Units, respectively)	322,876,450	404,921,242
General Partner (102,727.769 and 113,836.769 Units, respectively)	3,470,672	4,329,618
Total Partners' Capital	326,347,122	409,250,860
Total Liabilities and Partners' Capital	$ 331,719,542	$ 421,279,811
NET ASSET VALUE PER UNIT	$ 33.79	$ 38.03