INVESTMENTS, DERIVATIVE CONTRACTS AND OFF-BALANCE SHEET RISK (Details 4) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	$ 355,636	$ 1,169,146	$ (338,935)	$ 6,996,619
Change in Net Unrealized Profits (Losses)	(422,344)	(5,858,980)	(3,226,927)	(11,100,317)
Net Trading Profits (Losses)	(66,708)	(4,689,834)	(3,565,862)	(4,103,698)
Futures
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	(3,164,714)	(3,641,659)	(1,794,263)	(563,173)
Change in Net Unrealized Profits (Losses)	39,159	(4,252,535)	(1,947,657)	(8,017,944)
Net Trading Profits (Losses)	(3,125,555)	(7,894,194)	(3,741,920)	(8,581,117)
Futures \| Agriculture
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	(120,979)	(3,124,502)	(1,651,707)	(2,183,730)
Change in Net Unrealized Profits (Losses)	(268,888)	(450,233)	11,704	(1,432,031)
Net Trading Profits (Losses)	(389,867)	(3,574,735)	(1,640,003)	(3,615,761)
Futures \| Currencies
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	(1,760,351)	3,128,426	(2,991,488)	3,104,745
Change in Net Unrealized Profits (Losses)	656,765	(928,509)	(500,120)	(1,669,431)
Net Trading Profits (Losses)	(1,103,586)	2,199,917	(3,491,608)	1,435,314
Futures \| Energy
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	(54,081)	(1,389,601)	2,687,506	2,912,197
Change in Net Unrealized Profits (Losses)	(337,259)	(1,120,603)	(469,704)	(1,006,520)
Net Trading Profits (Losses)	(391,340)	(2,510,204)	2,217,802	1,905,677
Futures \| Interest rates
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	3,942,555	3,745,564	3,066,401	(509,314)
Change in Net Unrealized Profits (Losses)	(279,944)	(311,784)	(1,527,352)	(1,290,650)
Net Trading Profits (Losses)	3,662,611	3,433,780	1,539,049	(1,799,964)
Futures \| Metals
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	(525,382)	(1,655,060)	(1,242,926)	301,404
Change in Net Unrealized Profits (Losses)	352,495	(885,933)	320,045	(2,334,518)
Net Trading Profits (Losses)	(172,887)	(2,540,993)	(922,881)	(2,033,114)
Futures \| Stock indices
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	(4,646,476)	(4,346,486)	(1,662,049)	(4,188,475)
Change in Net Unrealized Profits (Losses)	(84,010)	(555,473)	217,770	(284,794)
Net Trading Profits (Losses)	(4,730,486)	(4,901,959)	(1,444,279)	(4,473,269)
Forwards
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	1,264,166	3,614,278	(2,634,490)	4,932,308
Change in Net Unrealized Profits (Losses)	(569,810)	(1,687,536)	(1,345,157)	(2,923,387)
Net Trading Profits (Losses)	694,356	1,926,742	(3,979,647)	2,008,921
Forwards \| Currencies
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	1,264,166	3,614,278	(2,634,490)	4,932,308
Change in Net Unrealized Profits (Losses)	(569,810)	(1,687,536)	(1,345,157)	(2,923,387)
Net Trading Profits (Losses)	694,356	1,926,742	(3,979,647)	2,008,921
Options
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	2,256,184	1,196,527	4,089,818	2,627,484
Change in Net Unrealized Profits (Losses)	108,307	81,091	65,887	(158,986)
Net Trading Profits (Losses)	2,364,491	1,277,618	4,155,705	2,468,498
Options \| Currencies
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	323,312	487,916	572,753	1,145,963
Change in Net Unrealized Profits (Losses)	(1,861)	91,278	21,078	(132,523)
Net Trading Profits (Losses)	321,451	579,194	593,831	1,013,440
Options \| Energy
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	407,881	136,653	529,452	192,731
Change in Net Unrealized Profits (Losses)	(108,246)	24,883	(110,068)
Net Trading Profits (Losses)	299,635	161,536	419,384	192,731
Options \| Interest rates
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	1,195,011	449,136	2,376,973	934,729
Change in Net Unrealized Profits (Losses)	116,037	(16,217)	75,820	(11,483)
Net Trading Profits (Losses)	1,311,048	432,919	2,452,793	923,246
Options \| Metals
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	70,288	(8,950)	68,154	(4,564)
Net Trading Profits (Losses)	70,288	(8,950)	68,154	(4,564)
Options \| Stock indices
Trading profits (losses) of the Partnership's derivatives
Realized Profits (Losses)	259,692	131,772	542,486	358,625
Change in Net Unrealized Profits (Losses)	102,377	(18,853)	79,057	(14,980)
Net Trading Profits (Losses)	$ 362,069	$ 112,919	$ 621,543	$ 343,645

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of trading securities held at each balance sheet date, that was included in earnings for the period. Trading securities are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) and the change in net unrealized holding gain (loss) is included in earnings for the period.

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+ Details

BlackRock Global Horizons I L.P. 10-Q