Ceres Tactical Commodity 10-Q 8 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	ck0001325676
Entity Registrant Name	CERES TACTICAL COMMODITY L.P.
Entity Central Index Key	1,325,676
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		49,183.7427
Class D [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		600.0580
Class Z [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0

Statements of Financial Conditi

Statements of Financial Condition - USD ($)		Sep. 30, 2018	Dec. 31, 2017
Assets:
Investment in the Fund(s), at fair value	[1]	$ 19,510,566	$ 69,682,811
Redemptions receivable from the Fund(s)		2,598,201	7,919,027
Equity in trading account:
Unrestricted cash		38,132,827	220,802
Restricted cash		3,662,217	0
Options purchased, at fair value (premiums paid $1,462,404 and $0 at September 30, 2018 and December 31, 2017, respectively)		989,794
Total equity in trading account		43,700,436	220,802
Cash at bank			436
Interest receivable		61,182
Total assets		65,870,385	77,823,076
Liabilities:
Options written, at fair value (premiums received $1,569,432 and $0 at September 30, 2018 and December 31, 2017, respectively)		1,136,771
Accrued expenses:
Ongoing selling agent fees		105,669	127,998
Management fees		83,959	80,706
General Partner fees		53,547	64,565
Incentive fees		584,970
Professional fees		179,446	216,978
Redemptions payable to General Partner			250,000
Redemptions payable to Limited Partners		2,511,239	7,367,055
Total liabilities		4,848,293	8,107,302
Partners' Capital:
Total partners' capital (net asset value)		61,022,092	69,715,774
Total liabilities and partners' capital		65,870,385	77,823,076
Forwards [Member]
Liabilities:
Net unrealized depreciation on open forward contracts		192,692
Futures [Member]
Equity in trading account:
Net unrealized appreciation on open futures contracts		915,598
Class Z [Member]
Partners' Capital:
General Partner, Class Z, 745.0230 and 795.9520 Redeemable Units outstanding at September 30, 2018 and December 31, 2017, respectively		747,562	769,492
Total partners' capital (net asset value)		$ 747,562	$ 769,492
Net asset value per Redeemable Unit		$ 1,003.41	$ 966.76
Class A [Member]
Partners' Capital:
Limited Partners, Class A, 46,120.1827 and 54,475.3577 Redeemable Units outstanding at September 30, 2018 and December 31, 2017, respectively		$ 59,673,111	$ 68,946,282
Total partners' capital (net asset value)		$ 59,673,111	$ 68,946,282
Net asset value per Redeemable Unit		$ 1,293.86	$ 1,265.64
Class D [Member]
Partners' Capital:
Limited Partners, Class A, 46,120.1827 and 54,475.3577 Redeemable Units outstanding at September 30, 2018 and December 31, 2017, respectively		$ 601,419
Total partners' capital (net asset value)		$ 601,419
Net asset value per Redeemable Unit		$ 1,002.27
[1]	Defined in Note 1.

Statements of Financial Condi_2

Statements of Financial Condition (Parenthetical) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Options purchased, premiums paid	$ 1,462,404	$ 0
Options written, premiums received	$ 1,569,432	$ 0
Class Z [Member]
General Partner Redeemable Units outstanding	745.0230	795.9520
Class A [Member]
Limited Partners Redeemable Units outstanding	46,120.1827	54,475.3577
Class D [Member]
Limited Partners Redeemable Units outstanding	600.0580	0

Condensed Schedule of Investmen

Condensed Schedule of Investments	Sep. 30, 2018USD ($)Derivative
Schedule of Investments [Line Items]
Investment, Fair Value	$ 19,510,566	[1]
Percentage of Partners' Capital	31.97%
Futures [Member]
Schedule of Investments [Line Items]
Net unrealized appreciation (depreciation) on open contracts	$ 915,598
Percentage of Partners' Capital	1.50%
Total unrealized appreciation on open contracts	$ 3,101,857
Total unrealized depreciation on open contracts	(2,186,259)
Option Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 1,709,275
Percentage of Partners' Capital	2.80%
Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 989,794
Percentage of Partners' Capital	1.62%
Options Written [Member] | Futures [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ (793,677)
Percentage of Partners' Capital	(1.30%)
Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ (1,136,771)
Percentage of Partners' Capital	(1.86%)
Metals [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 283,337
Total unrealized depreciation on open contracts	$ (67,970)
Metals [Member] | Option Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	99
Investment, Fair Value	$ 244,587
Percentage of Partners' Capital	0.40%
Metals [Member] | Options Written [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	90
Investment, Fair Value	$ (29,220)
Percentage of Partners' Capital	(0.05%)
Currencies [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 8,778
Currencies [Member] | Option Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	19
Investment, Fair Value	$ 8,778
Percentage of Partners' Capital	0.01%
Energy [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 1,926,295
Total unrealized depreciation on open contracts	$ (1,376,049)
Energy [Member] | Option Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	939
Investment, Fair Value	$ 1,803,443
Percentage of Partners' Capital	2.96%
Energy [Member] | Options Written [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	787
Investment, Fair Value	$ (1,253,197)
Percentage of Partners' Capital	(2.05%)
Grains [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 348,952
Total unrealized depreciation on open contracts	$ (330,290)
Grains [Member] | Option Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	524
Investment, Fair Value	$ (165,168)
Percentage of Partners' Capital	(0.27%)
Grains [Member] | Options Written [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	497
Investment, Fair Value	$ 183,830
Percentage of Partners' Capital	0.30%
Livestock [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 52,090
Total unrealized depreciation on open contracts	$ (13,393)
Livestock [Member] | Option Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	48
Investment, Fair Value	$ 51,700
Percentage of Partners' Capital	0.08%
Livestock [Member] | Options Written [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	46
Investment, Fair Value	$ (13,003)
Percentage of Partners' Capital	(0.02%)
Softs [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 482,405
Total unrealized depreciation on open contracts	$ (398,557)
Softs [Member] | Option Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	292
Investment, Fair Value	$ (234,065)
Percentage of Partners' Capital	(0.38%)
Softs [Member] | Options Written [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	276
Investment, Fair Value	$ 317,913
Percentage of Partners' Capital	0.52%
Forwards [Member]
Schedule of Investments [Line Items]
Net unrealized appreciation (depreciation) on open contracts	$ (192,692)
Total unrealized appreciation on open contracts	829,696
Total unrealized depreciation on open contracts	(1,022,388)
Forwards [Member] | Metals [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	829,696
Total unrealized depreciation on open contracts	(1,022,388)
Calls [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 350,877
Percentage of Partners' Capital	0.57%
Calls [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ (270,991)
Percentage of Partners' Capital	(0.44%)
Calls [Member] | Metals [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	300
Investment, Fair Value	$ 275,200
Percentage of Partners' Capital	0.45%
Calls [Member] | Metals [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	157
Investment, Fair Value	$ (168,509)
Percentage of Partners' Capital	(0.28%)
Calls [Member] | Energy [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	39
Investment, Fair Value	$ (62,010)
Percentage of Partners' Capital	(0.09%)
Calls [Member] | Grains [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	110
Investment, Fair Value	$ 32,312
Percentage of Partners' Capital	0.05%
Calls [Member] | Grains [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	100
Investment, Fair Value	$ (34,375)
Percentage of Partners' Capital	(0.06%)
Calls [Member] | Softs [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	34
Investment, Fair Value	$ 43,365
Percentage of Partners' Capital	0.07%
Calls [Member] | Softs [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	6
Investment, Fair Value	$ (6,097)
Percentage of Partners' Capital	(0.01%)
Puts [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 638,917
Percentage of Partners' Capital	1.05%
Puts [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ (865,780)
Percentage of Partners' Capital	(1.42%)
Puts [Member] | Metals [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	281
Investment, Fair Value	$ 593,711
Percentage of Partners' Capital	0.98%
Puts [Member] | Metals [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	298
Investment, Fair Value	$ (742,185)
Percentage of Partners' Capital	(1.22%)
Puts [Member] | Energy [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	15
Investment, Fair Value	$ 32,250
Percentage of Partners' Capital	0.05%
Puts [Member] | Energy [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	15
Investment, Fair Value	$ (16,950)
Percentage of Partners' Capital	(0.03%)
Puts [Member] | Livestock [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	2
Investment, Fair Value	$ 2,440
Percentage of Partners' Capital	0.00%
Puts [Member] | Softs [Member] | Option Purchased [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	20
Investment, Fair Value	$ 10,516
Percentage of Partners' Capital	0.02%
Puts [Member] | Softs [Member] | Options Written [Member] | Option [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	80
Investment, Fair Value	$ (106,645)
Percentage of Partners' Capital	(0.17%)
MB Master Fund L.P. [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 7,570,923
Percentage of Partners' Capital	12.41%
CMF Harbour Square Master Fund LLC [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 11,939,643
Percentage of Partners' Capital	19.56%
Assets [Member] | Forwards [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	136.00%
Assets [Member] | Forwards [Member] | Metals [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	494
Percentage of Partners' Capital	1.36%
Liabilities [Member] | Forwards [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	(1.68%)
Liabilities [Member] | Forwards [Member] | Metals [Member]
Schedule of Investments [Line Items]
Number of Contracts	434
Percentage of Partners' Capital	(1.68%)
[1]	Defined in Note 1.

Condensed Schedule of Investm_2

Condensed Schedule of Investments - (Parenthetical)	Sep. 30, 2018USD ($)
Schedule of Investments [Line Items]
Options purchased, premium paid	$ 1,462,404
Options written, premium received	1,569,432
Calls [Member]
Schedule of Investments [Line Items]
Options purchased, premium paid	773,439
Options written, premium received	688,954
Puts [Member]
Schedule of Investments [Line Items]
Options purchased, premium paid	688,965
Options written, premium received	$ 880,478

Statements of Income and Expens

Statements of Income and Expenses - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017
Investment Income:
Interest income		$ 181,876		$ 476,477
Interest income allocated from the Fund(s)		108,599	$ 207,396	306,473		$ 514,374
Total investment income		290,475	207,396	782,950		514,374
Expenses:
Expenses allocated from the Fund(s)		76,335	414,873	249,066		1,128,637
Clearing fees related to direct investments		111,464		387,128
Ongoing selling agent fees		318,994	441,019	993,377		1,457,312
Management fees		251,408	277,716	770,390		918,166
General Partner fees		161,597	222,173	501,071		734,534
Incentive fees		230,283		645,603
Professional fees		86,651	89,811	264,845		279,958
Total expenses		1,236,732	1,445,592	3,811,480		4,518,607
Net investment loss		(946,257)	(1,238,196)	(3,028,530)		(4,004,233)
Net gains (losses) on trading of commodity interests and investment in the Fund(s):
Net realized gains (losses) on closed contracts		723,154		4,181,220
Net realized gains (losses) on closed contracts allocated from the Fund(s)		(1,092,352)	2,556,222	(226,838)		1,605,458
Net change in unrealized gains (losses) on open contracts		1,008,086		680,633
Net change in unrealized gains (losses) on open contracts allocated from the Fund(s)		252,334	631,153	(86,360)		(428,942)
Total trading results		891,222	3,187,375	4,548,655		1,176,516
Net income (loss)		$ (55,035)	$ 1,949,179	1,520,125		(2,827,717)
Class A [Member]
Net gains (losses) on trading of commodity interests and investment in the Fund(s):
Net income (loss)				$ 1,490,636		$ (2,812,508)
Net income (loss) per Redeemable Unit	[1]	$ (1.17)	$ 27.90	$ 28.22		$ (35.14)
Weighted average Redeemable Units outstanding		48,551.9774	67,153.9024	50,759.3021		73,977.0435
Class D [Member]
Net gains (losses) on trading of commodity interests and investment in the Fund(s):
Net income (loss)				$ 1,419
Net income (loss) per Redeemable Unit	[1]	$ 2.27		$ 2.27	[2]
Weighted average Redeemable Units outstanding		566.7053		566.7053	[2]
Class Z [Member]
Net gains (losses) on trading of commodity interests and investment in the Fund(s):
Net income (loss)				$ 28,070		$ (15,209)
Net income (loss) per Redeemable Unit	[1]	$ 4.17	$ 26.04	$ 36.65		$ (11.54)
Weighted average Redeemable Units outstanding		745.0230	1,054.5480	761.9993		1,195.1252
[1]	Represents the change in net asset value per Redeemable Unit during the period.
[2]	From July 1, 2018, the date Class D Redeemable Units were first issued, to September 30, 2018.

Statements of Changes in Partne

Statements of Changes in Partners' Capital - USD ($)	Total	Class A [Member]	Class D [Member]	Class Z [Member]	General Partner [Member]	General Partner [Member]Class A [Member]	General Partner [Member]Class Z [Member]	Limited Partners [Member]	Limited Partners [Member]Class A [Member]	Limited Partners [Member]Class D [Member]
Partners' Capital, beginning of period at Dec. 31, 2016	$ 103,433,044	$ 103,433,044
Partners' Capital, Redeemable Units, beginning of period at Dec. 31, 2016	77,437.5062	77,437.5062
Subscriptions					$ 1,307,587		$ 1,307,587	$ 8,129,804	$ 8,129,804
Subscriptions, Redeemable Units					1,307.587		1,307.587	6,086.936	6,086.936
Redemptions					$ (1,458,476)	$ (1,208,476)	$ (250,000)	$ (23,429,804)	$ (23,429,804)
Redemptions, Redeemable Units					(1,157.7925)	(904.7535)	(253.0390)	(17,946.135)	(17,946.135)
Net income (loss)	$ (2,827,717)	$ (2,812,508)		$ (15,209)
Partners' Capital, end of period at Sep. 30, 2017	$ 85,154,438	$ 84,112,060		$ 1,042,378
Partners' Capital, Redeemable Units, end of period at Sep. 30, 2017	65,728.1017	64,673.5537		1,054.5480
Partners' Capital, beginning of period at Dec. 31, 2017	$ 69,715,774	$ 68,946,282		$ 769,492
Partners' Capital, Redeemable Units, beginning of period at Dec. 31, 2017	55,271.3097	54,475.3577		795.9520
Subscriptions								$ 2,836,208	$ 2,236,208	$ 600,000
Subscriptions, Redeemable Units								2,337.632	1,737.574	600.058
Redemptions					$ (50,000)		$ (50,000)	$ (13,000,015)	$ (13,000,015)
Redemptions, Redeemable Units					(50.929)		(50.929)	(10,092.749)	(10,092.749)
Net income (loss)	$ 1,520,125	$ 1,490,636	$ 1,419	$ 28,070
Partners' Capital, end of period at Sep. 30, 2018	$ 61,022,092	$ 59,673,111	$ 601,419	$ 747,562
Partners' Capital, Redeemable Units, end of period at Sep. 30, 2018	47,465.2637	46,120.1827	600.0580	745.0230

Organization

Organization	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	1. Organization: Ceres Tactical Commodity L.P. (formerly, Managed Futures Premier Aventis II L.P.) (the “Partnership”) is a limited partnership organized on April 20, 2005 under the partnership laws of the State of New York to engage, directly or indirectly, in the speculative trading of commodity interests on U.S. and international futures, options on futures and forward markets. The Partnership may also engage, directly or indirectly, in swap transactions and other derivative transactions with the approval of the General Partner (as defined below). Initially, the Partnership’s investment strategy focused on energy and energy-related investments. While the Partnership is expected to continue to have exposure to energy and energy-related markets, such trading will no longer be the Partnership’s primary focus. Therefore, the Partnership’s past trading performance will not necessarily be indicative of future results. The commodity interests that are traded by the Partnership, directly or indirectly through its investment in the Funds (as defined below) are volatile and involve a high degree of market risk. The General Partner may also determine to invest up to all of the Partnership’s assets (directly or indirectly through its investment in the Funds) in United States (“U.S.”) Treasury bills and/or money market mutual funds, including money market mutual funds managed by Morgan Stanley or its affiliates. During the initial offering period, the Partnership sold 11,925 redeemable units of limited partnership interest in the Partnership (“Redeemable Units”). The Partnership commenced trading on September 6, 2005. The Partnership privately and continuously offers Redeemable Units to qualified investors. There is no maximum number of Redeemable Units that may be sold by the Partnership. Ceres Managed Futures LLC, a Delaware limited liability company, acts as the general partner (the “General Partner”) and commodity pool operator of the Partnership and is the trading manager (the “Trading Manager”) of Harbour Square Master (as defined below). The General Partner is a wholly-owned As of September 30, 2018, all trading decisions are made for the Partnership by Aventis Asset Management, LLC (“Aventis”), Millburn Ridgefield Corporation (“Millburn”), Ospraie Management LLC (“Ospraie”) and Harbour Square Capital Management LLC (“Harbour Square”) (each, an “Advisor” and, collectively, the “Advisors”), each of which is a registered commodity trading advisor. Each Advisor is allocated a portion of the Partnership’s assets to manage. The Partnership invests the portion of its assets allocated to each of the Advisors either directly, through individually managed accounts, or indirectly, through its investment in the Funds. The Advisors are not affiliated with one another, are not affiliated with the General Partner and MS&Co. (as defined below) and are not responsible for the organization or operation of the Partnership. As of June 13, 2018, the Partnership began offering three classes of limited partnership interests, Class A Redeemable Units, Class D Redeemable Units and Class Z Redeemable Units. All Redeemable Units issued prior to October 31, 2016 were deemed “Class A Redeemable Units.” Class Z Redeemable Units were first issued on January 1, 2017. The rights, liabilities, risks and fees associated with investment in the Class A Redeemable Units were not changed. Class D Redeemable Units were first issued July 1, 2018. The rights, liabilities, risks, and fees associated with investment in the Class A Redeemable Units and Class Z Redeemable Units were not changed. Class A Redeemable Units, Class D Redeemable Units and Class Z Redeemable Units will each be referred to as a “Class” and collectively referred to as the “Classes.” Class A Redeemable Units and Class D Redeemable Units are available to taxable U.S. individuals and institutions, U.S. tax exempt individuals and institutions and non-U.S. month-end month-end During the reporting periods ended September 30, 2018 and 2017, the Partnership’s/Funds’ commodity broker was Morgan Stanley & Co. LLC (“MS&Co.”), a registered futures commission merchant. During prior periods included in this report, the Partnership/Funds also deposited a portion of their cash in non-trading Millburn and Ospraie directly trade the Partnership’s assets allocated to each Advisor through managed accounts in the name of the Partnership pursuant to Millburn’s Commodity Program and Ospraie’s Commodity Program, respectively. MB Master Fund L.P. (“MB Master”) and CMF Harbour Square Master Fund LLC (“Harbour Square Master”) have entered into futures brokerage account agreements with MS&Co. MB Master and Harbour Square Master are collectively referred to as the “Funds.” The Partnership’s/Funds’ trading of futures, forward, swap and option contracts, if applicable, on commodities is done primarily on U.S. commodity exchanges and foreign commodity exchanges. The Partnership/Funds engage in such trading through commodity brokerage accounts maintained with MS&Co. The Partnership has entered into futures brokerage account agreements with MS&Co. The Partnership, directly and through its investment in the Funds, pays MS&Co. (or will reimburse MS&Co. if previously paid) its allocable share of all trading fees for the clearing and, where applicable, execution of transactions as well as exchange, user, give-up, The Partnership has entered into a selling agreement (as amended, the “Selling Agreement”) with Morgan Stanley Wealth Management. Pursuant to the Selling Agreement, the Partnership pays Morgan Stanley Wealth Management a monthly ongoing selling agent fee at the rates described above. The ongoing selling agent fee received by Morgan Stanley Wealth Management is shared with the properly registered or exempted financial advisors of Morgan Stanley Wealth Management who have sold Class A and Class D Redeemable Units in the Partnership. In July 2015, the General Partner delegated certain administrative functions to SS&C Technologies, Inc., a Delaware corporation, currently doing business as SS&C GlobeOp (the “Administrator”). Pursuant to a master services agreement, the Administrator furnishes certain administrative, accounting, regulatory reporting, tax and other services as agreed from time to time. In addition, the Administrator maintains certain books and records of the Partnership. The cost of retaining the Administrator is allocated among the pools operated by the General Partner, including the Partnership.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	2. Basis of Presentation and Summary of Significant Accounting Policies: The accompanying financial statements and accompanying notes are unaudited but, in the opinion of the General Partner, include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the Partnership’s financial condition at September 30, 2018, the results of its operations for the three and nine months ended September 30, 2018 and 2017 and changes in partners’ capital for the nine months ended September 30, 2018 and 2017. These financial statements present the results for interim periods and do not include all disclosures normally provided in annual financial statements. These financial statements should be read together with the financial statements and notes included in the Partnership’s Annual Report on Form 10-K Due to the nature of commodity trading, the results of operations for the interim periods presented should not be considered indicative of the results that may be expected for the entire year. Use of Estimates. Profit Allocation Statement of Cash Flows. “Statement of Cash Flows.” Partnership’s Investment in the Funds. Partnership’s/Funds’ Derivative Investments. first-in, first-out The Partnership/Funds do not isolate the portion of the results of operations arising from the effect of changes in foreign exchange rates on investments due to fluctuations from changes in market prices of investments held. Such fluctuations are included in total trading results in the Partnership’s/Funds’ Statements of Income and Expenses. Partnership’s Cash Income Taxes. “Income Taxes,” “more-likely-than-not” more-likely-than-not Investment Company Status. 2013-08 , “Financial Services — Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements” Net Income (Loss) per Redeemable Unit. Financial Services — Investment Companies There have been no material changes with respect to the Partnership’s critical accounting policies as reported in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2017.

Financial Highlights

Financial Highlights	9 Months Ended
	Sep. 30, 2018
Investment Company [Abstract]
Financial Highlights	3. Financial Highlights: Financial highlights for the limited partner Classes as a whole for the three and nine months ended September 30, 2018 and 2017 were as follows. There were no Class D Redeemable Units held prior to July 1, 2018. Three Months Ended Three Months Ended Nine Months Ended Nine Months Ended Class A Class D Class A Class A Class A Per Redeemable Unit Performance (for a unit outstanding throughout the period):* Net realized and unrealized gains (losses) $ 18.03 $ 14.20 $ 46.20 $ 87.30 $ 18.57 Net investment loss (19.20) (11.93) (18.30) (59.08) (53.71) Increase (decrease) for the period (1.17) 2.27 27.90 28.22 (35.14) Net asset value per Redeemable Unit, beginning of period 1,295.03 1,000.00 1,272.66 1,265.64 1,335.70 Net asset value per Redeemable Unit, end of period $ 1,293.86 $ 1,002.27 $ 1,300.56 $ 1,293.86 $ 1,300.56 Three Months Ended Three Months Ended Nine Months Ended Nine Months Ended Class A Class D Class A Class A Class A Ratios to Average Limited Partners’ Capital:** Net investment loss*** (4.9) % (3.7) % (5.6) % (5.9) % (5.6) % Operating expenses 6.3 % 5.2 % 6.6 % 6.5 % 6.3 % Incentive fees 0.4 % 0.4 % - % 1.0 % - % Total expenses 6.7 % 5.6 % 6.6 % 7.5 % 6.3 % Total return: Total return before incentive fees 0.3 % 0.6 % 2.2 % 3.2 % (2.6) % Incentive fees (0.4) % (0.4) % - % (1.0) % - % Total return after incentive fees (0.1) % 0.2 % 2.2 % 2.2 % (2.6) % * Net investment loss per Redeemable Unit is calculated by dividing the interest income less total expenses by the average number of Redeemable Units outstanding during the period. The net realized and unrealized gains (losses) per Redeemable Unit is a balancing amount necessary to reconcile the change in net asset value per Redeemable Unit with the other per unit information. ** Annualized (except for incentive fees). *** Interest income less total expenses. The above ratios and total return may vary for individual investors based on the timing of capital transactions during the period. Additionally, these ratios are calculated for the limited partner class for the Classes using the limited partners’ share of income, expenses and average partners’ capital of the Partnership and include the income and expenses allocated from the Funds.

Trading Activities

Trading Activities	9 Months Ended
	Sep. 30, 2018
Brokers and Dealers [Abstract]
Trading Activities	4. Trading Activities: The Partnership was formed for the purpose of trading contracts in a variety of commodity interests, including derivative financial instruments and derivative commodity instruments. The results of the Partnership’s trading activities are shown in the Statements of Income and Expenses. The Partnership also invests certain of its assets through a “master/feeder” structure. The Partnership’s pro-rata The futures brokerage account agreements with MS&Co. give the Partnership and the Funds, respectively, the legal right to net unrealized gains and losses on open futures and forward contracts in their respective Statements of Financial Condition. The Partnership and the Funds net, for financial reporting purposes, the unrealized gains and losses on open futures and open forward contracts in their respective Statements of Financial Condition, as the criteria under ASC 210-20, Balance Sheet All of the commodity interests owned directly by the Partnership are held for trading purposes. All of the commodity interests owned by the Funds are held for trading purposes. The monthly average number of futures contracts traded directly by the Partnership during the three and nine months ended September 30, 2018 were 3,432 and 3,983, respectively. The monthly average number of metals forward contracts traded directly by the Partnership during the three and nine months ended September 30, 2018 were 1,106 and 914, respectively. The monthly average number of option contracts traded directly by the Partnership during the three and nine months ended September 30, 2018 were 1,197 and 1,134, respectively. There were no direct investments at December 31, 2017. Trading and transaction fees are based on the number of trades executed by the Advisors for the Partnership/Funds and the Partnership’s respective percentage ownership of each Fund. All clearing fees paid to MS&Co. are borne directly by the Partnership for its direct trading. In addition, clearing fees are borne by the Funds for indirect trading and allocated to the Funds’ limited partners/members, including the Partnership. The following table summarizes the gross and net amounts recognized relating to assets and liabilities of the Partnership’s derivatives and their offsetting subject to master netting arrangements or similar agreements as of September 30, 2018. Gross Amounts Offset in the Amounts Presented in the Gross Amounts Not Offset in the Statements of Financial Condition Gross Statements of Statements of Cash Collateral Amounts Financial Financial Financial Received/ September 30, 2018 Recognized Condition Condition Instruments Pledged* Net Amount Assets Futures $ 3,101,857 $ (2,186,259) $ 915,598 $ - $ - $ 915,598 Forwards 829,696 (829,696) - - - - Total assets $ 3,931,553 $ (3,015,955) $ 915,598 $ - $ - $ 915,598 Liabilities Futures $ (2,186,259) $ 2,186,259 $ - $ - $ - $ - Forwards (1,022,388) 829,696 (192,692) - - (192,692) Total liabilities $ (3,208,647) $ 3,015,955 $ (192,692) $ - $ - $ (192,692) Net fair value $ 722,906 * * In the event of default by the Partnership, MS&Co., the Partnership’s commodity futures broker and the sole counterparty to the Partnership’s non-exchange-traded The following table indicates the gross fair values of derivative instruments of futures, forward and option contracts held directly by the Partnership as separate assets and liabilities as of September 30, 2018. As of December 31, 2017, no derivative instruments were held directly by the Partnership. September 30, 2018 Assets Futures Contracts Currencies $ 8,778 Energy 1,926,295 Grains 348,952 Livestock 52,090 Metals 283,337 Softs 482,405 Total unrealized appreciation on open futures contracts 3,101,857 Liabilities Futures Contracts Energy (1,376,049) Grains (330,290) Livestock (13,393) Metals (67,970) Softs (398,557) Total unrealized depreciation on open futures contracts (2,186,259) Net unrealized appreciation on open futures contracts $ 915,598 * Assets Forward Contracts Metals $ 829,696 Total unrealized appreciation on open forward contracts 829,696 Liabilities Forward Contracts Metals (1,022,388) Total unrealized depreciation on open forward contracts (1,022,388) Net unrealized depreciation on open forward contracts $ (192,692) ** Assets Options Purchased Energy $ 32,250 Grains 32,312 Livestock 2,440 Metals 868,911 Softs 53,881 Total options purchased $ 989,794 *** Liabilities Options Written Energy $ (78,960) Grains (34,375) Metals (910,694) Softs (112,742) Total options written $ (1,136,771) **** * This amount is in “Net unrealized appreciation on open futures contracts” in the Statements of Financial Condition. ** This amount is in “Net unrealized depreciation on open forward contracts” in the Statements of Financial Condition. *** This amount is in “Options purchased, at fair value” in the Statements of Financial Condition. **** This amount is in “Options written, at fair value” in the Statements of Financial Condition. The following table indicates the trading gains and losses, by market sector, on derivative instruments traded directly by the Partnership for the three and nine months ended September 30, 2018. During the three and nine months ended September 30, 2017, no derivative instruments were traded directly by the Partnership. Three Months Ended Nine Months Ended Sector September 30, 2018 September 30, 2018 Currencies $ (45,673) $ (332,144) Energy 1,476,869 4,333,030 Grains 365,561 (78,324) Interest Rates Non-U.S. – 17,430 Livestock 108,516 433,075 Metals (299,924) 102,330 Softs 125,891 386,456 Total $ 1,731,240 ***** $ 4,861,853 ***** ***** This amount is included in “Total trading results” in the Statements of Income and Expenses.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements: Partnership’s and the Funds’ Fair Value Measurements The fair value of exchange-traded futures, option and forward contracts is determined by the various exchanges, and reflects the settlement price for each contract as of the close of business on the last business day of the reporting period. The fair value of foreign currency forward contracts is extrapolated on a forward basis from the spot prices quoted as of approximately 3:00 P.M. (E.T.) on the last business day of the reporting period from various exchanges. The fair value of non-exchange-traded The Partnership and the Funds consider prices for commodity futures, swap and option contracts to be based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1). The values of U.S. Treasury bills, non-exchange-traded September 30, 2018 Total Level 1 Level 2 Level 3 Assets Futures $ 3,101,857 $ 3,101,857 $ – $ – Forwards 829,696 – 829,696 – Options purchased 989,794 989,794 – – Total assets $ 4,921,347 $ 4,091,651 $ 829,696 $ – Liabilities Futures $ 2,186,259 $ 2,186,259 $ – $ – Forwards 1,022,388 – 1,022,388 – Options written 1,136,771 1,136,771 – – Total liabilities $ 4,345,418 $ 3,323,030 $ 1,022,388 $ –

Investment in the Funds

Investment in the Funds	9 Months Ended
	Sep. 30, 2018
Schedule of Investments [Abstract]
Investment in the Funds	6. Investment in the Funds: On February 1, 2013, the Partnership allocated substantially all of its capital to MB Master, a limited partnership organized under the partnership laws of the State of Delaware. MB Master permits accounts managed by Aventis using its Aventis Diversified Commodity Strategy, a proprietary, discretionary trading system, to invest together in one trading vehicle. The General Partner is also the general partner of MB Master. Individual and pooled accounts currently managed by Aventis, including the Partnership, are permitted to be limited partners of MB Master. The General Partner and Aventis believe that trading through this master/feeder structure should promote efficiency and economy in the trading process. On January 1, 2018, the Partnership allocated a portion of its assets to Harbour Square Master, a limited liability company organized under the limited liability company laws of the State of Delaware. Harbour Square Master permits accounts managed by Harbour Square using Harbour Square’s Discretionary Energy Program, a proprietary, discretionary trading system, to invest together in one trading vehicle. The General Partner is also the trading manager of Harbour Square Master. Individual and pooled accounts currently managed by Harbour Square, including the Partnership, are permitted to be members of Harbour Square Master. The Trading Manager and Harbour Square believe that trading through this structure should promote efficiency and economy in the trading process. The Trading Manager and Harbour Square have agreed that Harbour Square will trade the Fund’s assets allocated to Harbour Square Master at a level that is up to 1.5 times the amount of the assets allocated. The amount of leverage may be changed in the future. The General Partner is not aware of any material changes to the trading programs discussed above during the fiscal quarter ended September 30, 2018. The Funds’ and the Partnership’s trading of futures, forward and option contracts, as applicable, on commodities is done primarily on U.S. and foreign commodity exchanges. The Funds and the Partnership engage in such trading through commodity brokerage accounts maintained with MS&Co. Generally, a limited partner/member in the Funds withdraws all or part of its capital contribution and undistributed profits, if any, from the Funds as of the end of any month (the “Redemption Date”) after a request has been made to the General Partner/Trading Manager at least three days in advance of the Redemption Date. Such withdrawals are classified as a liability when the limited partner/member elects to redeem and informs the Funds. However, a limited partner/member may request a withdrawal as of the end of any day if such request is received by the General Partner/Trading Manager at least three days in advance of the proposed withdrawal day. Management fees, General Partner fees, ongoing selling agent fees and incentive fees are charged at the Partnership level. All clearing fees paid to MS&Co. are borne directly by the Partnership for its direct trading. In addition, clearing fees are borne by the Funds and allocated to the Funds’ limited partners/members, including the Partnership. Professional fees are borne by the Funds and allocated to the Partnership, and also charged directly at the Partnership level. At September 30, 2018, the Partnership owned approximately 48.8% of MB Master and 56.6% of Harbour Square Master. Prior to the close of business on December 31, 2017, the Partnership owned approximately 89.3% of MB Master. It is the Partnership’s intention to continue to invest in the Funds. The performance of the Partnership is directly affected by the performance of the Funds. Expenses to investors as a result of the investment in the Funds are approximately the same as they would be if the Partnership traded directly and redemption rights are not affected. Summarized information reflecting the total assets, liabilities and partners’ capital of the Funds is shown in the following tables: September 30, 2018 Total Assets Total Liabilities Total Capital MB Master $ 15,927,110 $ 434,768 $ 15,492,342 Harbour Square Master 23,661,573 2,625,728 21,035,845 December 31, 2017 Total Assets Total Liabilities Total Capital MB Master $ 87,348,208 $ 9,978,681 $ 77,369,527 Summarized information reflecting the net investment income (loss), total trading results and net income (loss) of the Funds is shown in the following tables: For the three months ended September 30, 2018 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ 22,573 $ (408,652) $ (386,079) Harbour Square Master 68,750 (1,067,004) (998,254) For the nine months ended September 30, 2018 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ 21,503 $ (363,256) $ (341,753) Harbour Square Master 210,173 (190,943) 19,230 For the three months ended September 30, 2017 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ (202,137) $ 3,661,231 $ 3,459,094 For the nine months ended September 30, 2017 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ (609,805) $ 1,402,859 $ 793,054 Summarized information reflecting the Partnership’s investments in and the Partnership’s pro-rata share of the results of operations of the Funds is shown in the following table: September 30, 2018 For the three months ended September 30, 2018 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Funds Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 12.41 % $ 7,570,923 $ (159,866) $ 36,765 $ 8,211 $ (204,842) Commodity Portfolio Monthly Harbour Square Master 19.56 % 11,939,643 (571,553) 21,226 10,133 (602,912) Commodity Portfolio Monthly Total $ 19,510,566 $ (731,419) $ 57,991 $ 18,344 $ (807,754) September 30, 2018 For the nine months ended September 30, 2018 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Funds Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 12.41 % $ 7,570,923 $ (83,209) $ 150,809 $ 24,820 $ (258,838) Commodity Portfolio Monthly Harbour Square Master 19.56 % 11,939,643 76,484 42,538 30,899 3,047 Commodity Portfolio Monthly Total $ 19,510,566 $ (6,725) $ 193,347 $ 55,719 $ (255,791) December 31, 2017 For the three months ended September 30, 2017 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Fund Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 99.95 % $ 69,682,811 $ 3,394,771 $ 400,850 $ 14,023 $ 2,979,898 Commodity Portfolio Monthly Total $ 69,682,811 $ 3,394,771 $ 400,850 $ 14,023 $ 2,979,898 December 31, 2017 For the nine months ended September 30, 2017 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Fund Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 99.95 % $ 69,682,811 $ 1,690,890 $ 1,086,506 $ 42,131 $ 562,253 Commodity Portfolio Monthly Total $ 69,682,811 $ 1,690,890 $ 1,086,506 $ 42,131 $ 562,253

Financial Instrument Risks

Financial Instrument Risks	9 Months Ended
	Sep. 30, 2018
Investments, All Other Investments [Abstract]
Financial Instrument Risks	7. Financial Instrument Risks: In the normal course of business, the Partnership and the Funds are parties to financial instruments with off-balance-sheet over-the-counter Futures Contracts. London Metals Exchange Forward Contracts. Options. marked-to-market marked-to-market As both a buyer and seller of options, the Partnership/Funds pay or receive a premium at the outset and then bear the risk of unfavorable changes in the price of the contract underlying the option. Written options expose the Partnership/Funds to potentially unlimited liability; for purchased options, the risk of loss is limited to the premiums paid. Certain written put options permit cash settlement and do not require the option holder to own the reference asset. The Partnership/Funds do not consider these contracts to be guarantees. Futures-style options. Market risk is the potential for changes in the value of the financial instruments traded by the Partnership/Funds due to market changes, including interest and foreign exchange rate movements and fluctuations in commodity or security prices. Market risk is directly impacted by the volatility and liquidity in the markets in which the related underlying assets are traded. The Partnership and the Funds are exposed to market risk equal to the value of the futures and forward contracts held and unlimited liability on such contracts sold short. Credit risk is the possibility that a loss may occur due to the failure of a counterparty to perform according to the terms of a contract. The Partnership’s/Funds’ risk of loss in the event of counterparty default is typically limited to the amounts recognized in the Statements of Financial Condition and is not represented by the contract or notional amounts of the instruments. The Partnership’s/Funds’ risk of loss is reduced through the use of legally enforceable master netting agreements with counterparties that permit the Partnership/Funds to offset unrealized gains and losses and other assets and liabilities with such counterparties upon the occurrence of certain events. The Partnership/Funds have credit risk and concentration risk, as MS&Co. or an MS&Co. affiliate are counterparties or brokers with respect to the Partnership’s/Funds’ assets. Credit risk with respect to exchange-traded instruments is reduced to the extent that, through MS&Co. or an MS&Co. affiliate, the Partnership’s/Funds’ counterparty is an exchange or clearing organization. The General Partner monitors and attempts to mitigate the Partnership’s/Funds’ risk exposure on a daily basis through financial, credit and risk management monitoring systems and, accordingly, believes that it has effective procedures for evaluating and limiting the credit and market risks to which the Partnership/Funds may be subject. These monitoring systems generally allow the General Partner to statistically analyze actual trading results with risk-adjusted performance indicators and correlation statistics. In addition, online monitoring systems provide account analysis of futures, forward and option contracts by sector, margin requirements, gain and loss transactions and collateral positions. The majority of these financial instruments mature within one year of the inception date. However, due to the nature of the Partnership’s/Funds’ business, these instruments may not be held to maturity. The risk to the limited partners that have purchased Redeemable Units is limited to the amount of their share of the Partnership’s net assets and undistributed profits. This limited liability is a result of the organization of the Partnership as a limited partnership under New York law. In the ordinary course of business, the Partnership/Funds enter into contracts and agreements that contain various representations and warranties and which provide general indemnifications. The Partnership’s/Funds’ maximum exposure under these arrangements cannot be determined, as this could include future claims that have not yet been made against the Partnership/Funds. The Partnership/Funds consider the risk of any future obligation relating to these indemnifications to be remote.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	8. Subsequent Events: The General Partner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The General Partner has assessed the subsequent events through the date the financial statements were issued and has determined that there were no subsequent events requiring adjustment to or disclosure in the financial statements.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates.
Profit Allocation	Profit Allocation
Statement of Cash Flows	Statement of Cash Flows. “Statement of Cash Flows.”
Partnership's Investment in the Funds	Partnership’s Investment in the Funds.
Partnership's/Funds' Derivative Investments	Partnership’s/Funds’ Derivative Investments. first-in, first-out The Partnership/Funds do not isolate the portion of the results of operations arising from the effect of changes in foreign exchange rates on investments due to fluctuations from changes in market prices of investments held. Such fluctuations are included in total trading results in the Partnership’s/Funds’ Statements of Income and Expenses.
Partnership's Cash	Partnership’s Cash
Income Taxes	Income Taxes. “Income Taxes,” “more-likely-than-not” more-likely-than-not
Investment Company Status	Investment Company Status. 2013-08 , “Financial Services — Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements”
Net Income (Loss) per Redeemable Unit	Net Income (Loss) per Redeemable Unit. Financial Services — Investment Companies

Financial Highlights (Tables)

Financial Highlights (Tables)	9 Months Ended
	Sep. 30, 2018
Investment Company [Abstract]
Financial Highlights	Financial highlights for the limited partner Classes as a whole for the three and nine months ended September 30, 2018 and 2017 were as follows. There were no Class D Redeemable Units held prior to July 1, 2018. Three Months Ended Three Months Ended Nine Months Ended Nine Months Ended Class A Class D Class A Class A Class A Per Redeemable Unit Performance (for a unit outstanding throughout the period):* Net realized and unrealized gains (losses) $ 18.03 $ 14.20 $ 46.20 $ 87.30 $ 18.57 Net investment loss (19.20) (11.93) (18.30) (59.08) (53.71) Increase (decrease) for the period (1.17) 2.27 27.90 28.22 (35.14) Net asset value per Redeemable Unit, beginning of period 1,295.03 1,000.00 1,272.66 1,265.64 1,335.70 Net asset value per Redeemable Unit, end of period $ 1,293.86 $ 1,002.27 $ 1,300.56 $ 1,293.86 $ 1,300.56 Three Months Ended Three Months Ended Nine Months Ended Nine Months Ended Class A Class D Class A Class A Class A Ratios to Average Limited Partners’ Capital:** Net investment loss*** (4.9) % (3.7) % (5.6) % (5.9) % (5.6) % Operating expenses 6.3 % 5.2 % 6.6 % 6.5 % 6.3 % Incentive fees 0.4 % 0.4 % - % 1.0 % - % Total expenses 6.7 % 5.6 % 6.6 % 7.5 % 6.3 % Total return: Total return before incentive fees 0.3 % 0.6 % 2.2 % 3.2 % (2.6) % Incentive fees (0.4) % (0.4) % - % (1.0) % - % Total return after incentive fees (0.1) % 0.2 % 2.2 % 2.2 % (2.6) % * Net investment loss per Redeemable Unit is calculated by dividing the interest income less total expenses by the average number of Redeemable Units outstanding during the period. The net realized and unrealized gains (losses) per Redeemable Unit is a balancing amount necessary to reconcile the change in net asset value per Redeemable Unit with the other per unit information. ** Annualized (except for incentive fees). *** Interest income less total expenses.

Trading Activities (Tables)

Trading Activities (Tables)	9 Months Ended
	Sep. 30, 2018
Brokers and Dealers [Abstract]
Summary of Valuation of Investments	The following table summarizes the gross and net amounts recognized relating to assets and liabilities of the Partnership’s derivatives and their offsetting subject to master netting arrangements or similar agreements as of September 30, 2018. Gross Amounts Offset in the Amounts Presented in the Gross Amounts Not Offset in the Statements of Financial Condition Gross Statements of Statements of Cash Collateral Amounts Financial Financial Financial Received/ September 30, 2018 Recognized Condition Condition Instruments Pledged* Net Amount Assets Futures $ 3,101,857 $ (2,186,259) $ 915,598 $ - $ - $ 915,598 Forwards 829,696 (829,696) - - - - Total assets $ 3,931,553 $ (3,015,955) $ 915,598 $ - $ - $ 915,598 Liabilities Futures $ (2,186,259) $ 2,186,259 $ - $ - $ - $ - Forwards (1,022,388) 829,696 (192,692) - - (192,692) Total liabilities $ (3,208,647) $ 3,015,955 $ (192,692) $ - $ - $ (192,692) Net fair value $ 722,906 * * In the event of default by the Partnership, MS&Co., the Partnership’s commodity futures broker and the sole counterparty to the Partnership’s non-exchange-traded
Gross Fair Values of Derivative Instruments of Futures and Option Contracts, as Separate Assets and Liabilities	The following table indicates the gross fair values of derivative instruments of futures, forward and option contracts held directly by the Partnership as separate assets and liabilities as of September 30, 2018. As of December 31, 2017, no derivative instruments were held directly by the Partnership. September 30, 2018 Assets Futures Contracts Currencies $ 8,778 Energy 1,926,295 Grains 348,952 Livestock 52,090 Metals 283,337 Softs 482,405 Total unrealized appreciation on open futures contracts 3,101,857 Liabilities Futures Contracts Energy (1,376,049) Grains (330,290) Livestock (13,393) Metals (67,970) Softs (398,557) Total unrealized depreciation on open futures contracts (2,186,259) Net unrealized appreciation on open futures contracts $ 915,598 * Assets Forward Contracts Metals $ 829,696 Total unrealized appreciation on open forward contracts 829,696 Liabilities Forward Contracts Metals (1,022,388) Total unrealized depreciation on open forward contracts (1,022,388) Net unrealized depreciation on open forward contracts $ (192,692) ** Assets Options Purchased Energy $ 32,250 Grains 32,312 Livestock 2,440 Metals 868,911 Softs 53,881 Total options purchased $ 989,794 *** Liabilities Options Written Energy $ (78,960) Grains (34,375) Metals (910,694) Softs (112,742) Total options written $ (1,136,771) **** * This amount is in “Net unrealized appreciation on open futures contracts” in the Statements of Financial Condition. ** This amount is in “Net unrealized depreciation on open forward contracts” in the Statements of Financial Condition. *** This amount is in “Options purchased, at fair value” in the Statements of Financial Condition. **** This amount is in “Options written, at fair value” in the Statements of Financial Condition.
Trading Gains and Losses, by Market Sector, on Derivative Instruments	The following table indicates the trading gains and losses, by market sector, on derivative instruments traded directly by the Partnership for the three and nine months ended September 30, 2018. During the three and nine months ended September 30, 2017, no derivative instruments were traded directly by the Partnership. Three Months Ended Nine Months Ended Sector September 30, 2018 September 30, 2018 Currencies $ (45,673) $ (332,144) Energy 1,476,869 4,333,030 Grains 365,561 (78,324) Interest Rates Non-U.S. – 17,430 Livestock 108,516 433,075 Metals (299,924) 102,330 Softs 125,891 386,456 Total $ 1,731,240 ***** $ 4,861,853 ***** ***** This amount is included in “Total trading results” in the Statements of Income and Expenses.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Derivative Instrument Fair Value Based on Hierarchy	September 30, 2018 Total Level 1 Level 2 Level 3 Assets Futures $ 3,101,857 $ 3,101,857 $ – $ – Forwards 829,696 – 829,696 – Options purchased 989,794 989,794 – – Total assets $ 4,921,347 $ 4,091,651 $ 829,696 $ – Liabilities Futures $ 2,186,259 $ 2,186,259 $ – $ – Forwards 1,022,388 – 1,022,388 – Options written 1,136,771 1,136,771 – – Total liabilities $ 4,345,418 $ 3,323,030 $ 1,022,388 $ –

Investment in the Funds (Tables

Investment in the Funds (Tables)	9 Months Ended
	Sep. 30, 2018
Schedule of Investments [Abstract]
Assets, Liabilities and Partners' Capital of Funds	Summarized information reflecting the total assets, liabilities and partners’ capital of the Funds is shown in the following tables: September 30, 2018 Total Assets Total Liabilities Total Capital MB Master $ 15,927,110 $ 434,768 $ 15,492,342 Harbour Square Master 23,661,573 2,625,728 21,035,845 December 31, 2017 Total Assets Total Liabilities Total Capital MB Master $ 87,348,208 $ 9,978,681 $ 77,369,527
Net Investment Income (Loss), Trading Results and Net Income (Loss) of Funds	Summarized information reflecting the net investment income (loss), total trading results and net income (loss) of the Funds is shown in the following tables: For the three months ended September 30, 2018 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ 22,573 $ (408,652) $ (386,079) Harbour Square Master 68,750 (1,067,004) (998,254) For the nine months ended September 30, 2018 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ 21,503 $ (363,256) $ (341,753) Harbour Square Master 210,173 (190,943) 19,230 For the three months ended September 30, 2017 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ (202,137) $ 3,661,231 $ 3,459,094 For the nine months ended September 30, 2017 Net Investment Total Trading Income (Loss) Results Net Income (Loss) MB Master $ (609,805) $ 1,402,859 $ 793,054
Partnership's Investments in, and Partnership's Pro Rata Share of Results of Operations of Funds	Summarized information reflecting the Partnership’s investments in and the Partnership’s pro-rata share of the results of operations of the Funds is shown in the following table: September 30, 2018 For the three months ended September 30, 2018 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Funds Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 12.41 % $ 7,570,923 $ (159,866) $ 36,765 $ 8,211 $ (204,842) Commodity Portfolio Monthly Harbour Square Master 19.56 % 11,939,643 (571,553) 21,226 10,133 (602,912) Commodity Portfolio Monthly Total $ 19,510,566 $ (731,419) $ 57,991 $ 18,344 $ (807,754) September 30, 2018 For the nine months ended September 30, 2018 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Funds Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 12.41 % $ 7,570,923 $ (83,209) $ 150,809 $ 24,820 $ (258,838) Commodity Portfolio Monthly Harbour Square Master 19.56 % 11,939,643 76,484 42,538 30,899 3,047 Commodity Portfolio Monthly Total $ 19,510,566 $ (6,725) $ 193,347 $ 55,719 $ (255,791) December 31, 2017 For the three months ended September 30, 2017 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Fund Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 99.95 % $ 69,682,811 $ 3,394,771 $ 400,850 $ 14,023 $ 2,979,898 Commodity Portfolio Monthly Total $ 69,682,811 $ 3,394,771 $ 400,850 $ 14,023 $ 2,979,898 December 31, 2017 For the nine months ended September 30, 2017 % of Expenses Net Partners’ Fair Income Clearing Professional Income Investment Redemptions Fund Capital Value (Loss) Fees Fees (Loss) Objective Permitted MB Master 99.95 % $ 69,682,811 $ 1,690,890 $ 1,086,506 $ 42,131 $ 562,253 Commodity Portfolio Monthly Total $ 69,682,811 $ 1,690,890 $ 1,086,506 $ 42,131 $ 562,253

Organization - Additional Infor

Organization - Additional Information (Detail) - shares	Sep. 06, 2005	Sep. 30, 2018
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Number of units sold during initial offering period	11,925
Morgan Stanley Wealth Management [Member] | Class A [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ongoing selling agent fee		2.00%
Morgan Stanley Wealth Management [Member] | Class D [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ongoing selling agent fee		0.75%

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Cash denominated in foreign currencies	$ 1,416	$ 0
Cost of foreign currencies	3,740	0
Restricted cash held for margin	3,662,217	$ 0
Uncertain tax position	$ 0
Open tax year	2014 2015 2016 2017

Financial Highlights - Financia

Financial Highlights - Financial Highlights for Limited Partner Class (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class A [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the period):
Net asset value per Redeemable Unit, beginning of period			$ 1,265.64
Net asset value per Redeemable Unit, end of period	$ 1,293.86		1,293.86
Class D [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the period):
Net asset value per Redeemable Unit, end of period	1,002.27		1,002.27
Limited Partners [Member] | Class A [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the period):
Net realized and unrealized gains (losses)	18.03	$ 46.20	87.30	$ 18.57
Net investment loss	(19.20)	(18.30)	(59.08)	(53.71)
Increase (decrease) for the period	(1.17)	27.90	28.22	(35.14)
Net asset value per Redeemable Unit, beginning of period	1,295.03	1,272.66	1,265.64	1,335.70
Net asset value per Redeemable Unit, end of period	$ 1,293.86	$ 1,300.56	$ 1,293.86	$ 1,300.56
Ratios to Average Limited Partners' Capital:
Net investment loss	(4.90%)	(5.60%)	(5.90%)	(5.60%)
Operating expenses	6.30%	6.60%	6.50%	6.30%
Incentive fees	0.40%		1.00%
Total expenses	6.70%	6.60%	7.50%	6.30%
Total return:
Total return before incentive fees	0.30%	2.20%	3.20%	(2.60%)
Incentive fees	(0.40%)		(1.00%)
Total return after incentive fees	(0.10%)	2.20%	2.20%	(2.60%)
Limited Partners [Member] | Class D [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the period):
Net realized and unrealized gains (losses)	$ 14.20
Net investment loss	(11.93)
Increase (decrease) for the period	2.27
Net asset value per Redeemable Unit, beginning of period	1,000
Net asset value per Redeemable Unit, end of period	$ 1,002.27		$ 1,002.27
Ratios to Average Limited Partners' Capital:
Net investment loss	(3.70%)
Operating expenses	5.20%
Incentive fees	0.40%
Total expenses	5.60%
Total return:
Total return before incentive fees	0.60%
Incentive fees	(0.40%)
Total return after incentive fees	0.20%

Trading Activities - Additional

Trading Activities - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2018Contractshares	Sep. 30, 2018Contractshares	Dec. 31, 2017USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Monthly average number of futures contracts traded	3,432	3,983
Monthly average number of metals forward contracts traded	1,106	914
Average number of options contracts traded | shares	1,197	1,134
Direct investments | $			$ 0

Trading Activities - Summary of

Trading Activities - Summary of Valuation of Investments (Detail)	Sep. 30, 2018USD ($)
Derivative [Line Items]
Net fair value	$ 722,906
Forwards [Member]
Derivative [Line Items]
Net Amounts Presented in the Statements of Financial Condition, Liabilities	(192,692)
MS&Co. [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	3,931,553
Gross Amounts Offset in the Statements of Financial Condition, Assets	(3,015,955)
Net Amounts Presented in the Statements of Financial Condition, Assets	915,598
Financial Instruments, Assets	0
Collateral Received/Pledged, Assets	0
Net Amount, Assets	915,598
Gross Amounts Recognized, Liabilities	(3,208,647)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	3,015,955
Net Amounts Presented in the Statements of Financial Condition, Liabilities	(192,692)
Financial Instruments, Liabilities	0
Collateral Received/Pledged, Liabilities	0
Net Amount, Liabilities	(192,692)
MS&Co. [Member] | Futures [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	3,101,857
Gross Amounts Offset in the Statements of Financial Condition, Assets	(2,186,259)
Net Amounts Presented in the Statements of Financial Condition, Assets	915,598
Financial Instruments, Assets	0
Collateral Received/Pledged, Assets	0
Net Amount, Assets	915,598
Gross Amounts Recognized, Liabilities	(2,186,259)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	2,186,259
Financial Instruments, Liabilities	0
Collateral Received/Pledged, Liabilities	0
MS&Co. [Member] | Forwards [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	829,696
Gross Amounts Offset in the Statements of Financial Condition, Assets	(829,696)
Financial Instruments, Assets	0
Collateral Received/Pledged, Assets	0
Gross Amounts Recognized, Liabilities	(1,022,388)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	829,696
Net Amounts Presented in the Statements of Financial Condition, Liabilities	(192,692)
Financial Instruments, Liabilities	0
Collateral Received/Pledged, Liabilities	0
Net Amount, Liabilities	$ (192,692)

Trading Activities - Gross Fair

Trading Activities - Gross Fair Values of Derivative Instruments of Futures and Option Contracts, as Separate Assets and Liabilities (Detail)	Sep. 30, 2018USD ($)
Derivative [Line Items]
Total options purchased	$ 989,794
Total options written	(1,136,771)
Forwards [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	829,696
Total unrealized depreciation on open contracts	(1,022,388)
Net unrealized appreciation (depreciation) on open contracts	(192,692)
Energy [Member]
Derivative [Line Items]
Total options purchased	32,250
Total options written	(78,960)
Grains [Member]
Derivative [Line Items]
Total options purchased	32,312
Total options written	(34,375)
Livestock [Member]
Derivative [Line Items]
Total options purchased	2,440
Metals [Member]
Derivative [Line Items]
Total options purchased	868,911
Total options written	(910,694)
Metals [Member] | Forwards [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	829,696
Total unrealized depreciation on open contracts	(1,022,388)
Softs [Member]
Derivative [Line Items]
Total options purchased	53,881
Total options written	(112,742)
Futures [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	3,101,857
Total unrealized depreciation on open contracts	(2,186,259)
Net unrealized appreciation (depreciation) on open contracts	915,598
Futures [Member] | Currencies [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	8,778
Futures [Member] | Energy [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	1,926,295
Total unrealized depreciation on open contracts	(1,376,049)
Futures [Member] | Grains [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	348,952
Total unrealized depreciation on open contracts	(330,290)
Futures [Member] | Livestock [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	52,090
Total unrealized depreciation on open contracts	(13,393)
Futures [Member] | Metals [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	283,337
Total unrealized depreciation on open contracts	(67,970)
Futures [Member] | Softs [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	482,405
Total unrealized depreciation on open contracts	$ (398,557)

Trading Activities - Trading Ga

Trading Activities - Trading Gains and Losses, by Market Sector, on Derivative Instruments (Detail) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Derivative [Line Items]
Trading gains and losses	$ 1,731,240	$ 4,861,853
Currencies [Member]
Derivative [Line Items]
Trading gains and losses	(45,673)	(332,144)
Energy [Member]
Derivative [Line Items]
Trading gains and losses	1,476,869	4,333,030
Grains [Member]
Derivative [Line Items]
Trading gains and losses	365,561	(78,324)
Interest Rates Non-U.S. [Member]
Derivative [Line Items]
Trading gains and losses		17,430
Livestock [Member]
Derivative [Line Items]
Trading gains and losses	108,516	433,075
Metals [Member]
Derivative [Line Items]
Trading gains and losses	(299,924)	102,330
Softs [Member]
Derivative [Line Items]
Trading gains and losses	$ 125,891	$ 386,456

Fair Value Measurements - Deriv

Fair Value Measurements - Derivative Instrument Fair Value Based on Hierarchy (Detail)	Sep. 30, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 4,921,347
Derivative liabilities	4,345,418
Futures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	3,101,857
Derivative liabilities	2,186,259
Forwards [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	829,696
Derivative liabilities	1,022,388
Option [Member] | Option Purchased [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	989,794
Option [Member] | Options Written [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	1,136,771
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	4,091,651
Derivative liabilities	3,323,030
Level 1 [Member] | Futures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	3,101,857
Derivative liabilities	2,186,259
Level 1 [Member] | Option [Member] | Option Purchased [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	989,794
Level 1 [Member] | Option [Member] | Options Written [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	1,136,771
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	829,696
Derivative liabilities	1,022,388
Level 2 [Member] | Forwards [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	829,696
Derivative liabilities	$ 1,022,388

Investment in the Funds - Addit

Investment in the Funds - Additional Information (Detail)	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2018
MB Master Fund L.P. [Member]
Investment [Line Items]
Percentage owned by partnership	48.80%	89.30%
CMF Harbour Square Master Fund LLC [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor			1.5 times
Percentage owned by partnership	56.60%

Investment in the Funds - Asset

Investment in the Funds - Assets, Liabilities and Partners' Capital of Funds (Detail) - USD ($)	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
Total Assets	$ 65,870,385	$ 77,823,076
Total Liabilities	4,848,293	8,107,302
Total Capital	61,022,092	69,715,774	$ 85,154,438	$ 103,433,044
MB Master Fund L.P. [Member]
Investment Holdings [Line Items]
Total Assets	15,927,110	87,348,208
Total Liabilities	434,768	9,978,681
Total Capital	15,492,342	$ 77,369,527
CMF Harbour Square Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	23,661,573
Total Liabilities	2,625,728
Total Capital	$ 21,035,845

Investment in the Funds - Net I

Investment in the Funds - Net Investment Income (Loss), Trading Results and Net Income (Loss) of Funds (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investment Holdings [Line Items]
Net Investment Income (Loss)	$ (946,257)	$ (1,238,196)	$ (3,028,530)	$ (4,004,233)
Net income (loss)	(55,035)	1,949,179	1,520,125	(2,827,717)
MB Master Fund L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	22,573	(202,137)	21,503	(609,805)
Total Trading Results	(408,652)	3,661,231	(363,256)	1,402,859
Net income (loss)	(386,079)	$ 3,459,094	(341,753)	$ 793,054
CMF Harbour Square Master Fund LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	68,750		210,173
Total Trading Results	(1,067,004)		(190,943)
Net income (loss)	$ (998,254)		$ 19,230

Investment in the Funds - Partn

Investment in the Funds - Partnership's Investments in, and Partnership's Pro Rata Share of Results of Operations of Funds (Detail) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Investment Holdings [Line Items]
% of Partners' Capital		31.97%		31.97%		99.95%
Fair Value	[1]	$ 19,510,566		$ 19,510,566		$ 69,682,811
Expenses, Clearing Fees		318,994	$ 441,019	993,377	$ 1,457,312
Net income (loss)		$ (55,035)	1,949,179	$ 1,520,125	(2,827,717)
MB Master Fund L.P. [Member]
Investment Holdings [Line Items]
% of Partners' Capital		12.41%		12.41%		99.95%
Fair Value		$ 7,570,923		$ 7,570,923		$ 69,682,811
Income (Loss)		(408,652)	3,661,231	(363,256)	1,402,859
Net income (loss)		$ (386,079)	3,459,094	$ (341,753)	793,054
CMF Harbour Square Master Fund LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital		19.56%		19.56%
Fair Value		$ 11,939,643		$ 11,939,643
Income (Loss)		(1,067,004)		(190,943)
Net income (loss)		(998,254)		19,230
Investment In Funds [Member]
Investment Holdings [Line Items]
Fair Value		19,510,566		19,510,566		$ 69,682,811
Income (Loss)		(731,419)	3,394,771	(6,725)	1,690,890
Expenses, Clearing Fees		57,991	400,850	193,347	1,086,506
Expenses, Professional Fees		18,344	14,023	55,719	42,131
Net income (loss)		$ (807,754)	2,979,898	$ (255,791)	562,253
Investment In Funds [Member] | MB Master Fund L.P. [Member] | Commodity [Member]
Investment Holdings [Line Items]
% of Partners' Capital		12.41%		12.41%		99.95%
Fair Value		$ 7,570,923		$ 7,570,923		$ 69,682,811
Income (Loss)		(159,866)	3,394,771	(83,209)	1,690,890
Expenses, Clearing Fees		36,765	400,850	150,809	1,086,506
Expenses, Professional Fees		8,211	14,023	24,820	42,131
Net income (loss)		$ (204,842)	$ 2,979,898	$ (258,838)	$ 562,253
Investment Objective		Commodity Portfolio	Commodity Portfolio	Commodity Portfolio	Commodity Portfolio
Redemptions Permitted		Monthly	Monthly	Monthly	Monthly
Investment In Funds [Member] | CMF Harbour Square Master Fund LLC [Member] | Commodity [Member]
Investment Holdings [Line Items]
% of Partners' Capital		19.56%		19.56%
Fair Value		$ 11,939,643		$ 11,939,643
Income (Loss)		(571,553)		76,484
Expenses, Clearing Fees		21,226		42,538
Expenses, Professional Fees		10,133		30,899
Net income (loss)		$ (602,912)		$ 3,047
Investment Objective		Commodity Portfolio		Commodity Portfolio
Redemptions Permitted		Monthly		Monthly
[1]	Defined in Note 1.

Financial Instrument Risks - Ad

Financial Instrument Risks - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018
Risks and Uncertainties [Abstract]
Financial instruments maturity period	1 year