2.4.0.81040 - Disclosure - MARKET AND CREDIT RISKStruefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001309136duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_RisksAndUncertaintiesAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0MARKET AND CREDIT RISKS2false 2us-gaap_ConcentrationRiskDisclosureTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;"> 4                 MARKET AND CREDIT RISKS   The nature of this Fund has certain risks, which cannot all be presented on the financial statements.  The following summarizes some of those risks.   Market Risk   Derivative instruments involve varying degrees of market risk.  Changes in the level or volatility of interest rates, foreign currency exchange rates or the market values of the financial instruments or commodities underlying such derivative instruments frequently result in changes in the Fund’s net unrealized profit (loss) on open contracts on such derivative instruments as reflected in the Statements of Financial Condition.  The Fund’s exposure to market risk is influenced by a number of factors, including the relationships among the derivative instruments held by the Fund as well as the volatility and liquidity of the markets in which the derivative instruments are traded.  Investments in foreign markets may also entail legal and political risks.   MLAI has procedures in place intended to control market risk exposure, although there can be no assurance that they will, in fact, succeed in doing so.  These procedures focus primarily on monitoring the trading of Winton, calculating the Net Asset Value of the Fund as of the close of business on each day and reviewing outstanding positions for over-concentrations.  While MLAI does not intervene in the markets to hedge or diversify the Fund’s market exposure, MLAI may urge Winton to reallocate positions in an attempt to avoid over-concentrations.  However, such interventions are expected to be unusual.  It is expected that MLAI’s basic risk control procedures will consist of the ongoing process of Trading Advisor monitoring, with the market risk controls being applied by Winton.   Credit Risk   The risks associated with exchange-traded contracts are typically perceived to be less than those associated with over-the-counter (non-exchange-traded) transactions, because exchanges typically (but not universally) provide clearinghouse arrangements in which the collective credit (in some cases limited in amount, in some cases not) of the members of the exchange/clearinghouse is pledged to support the financial integrity of the exchange/clearinghouse.  In over-the-counter transactions, on the other hand, traders must rely solely on the credit of their respective individual counterparties.  Margins, which may be subject to loss in the event of a default, are generally required in exchange traded contracts, and in the over-the-counter markets counterparties may also require margin.   The credit risk associated with these instruments from counterparty nonperformance is the net unrealized profit (loss) on open contracts, if any, included in the Statements of Financial Condition.   MLAI, as sponsor of the Fund, has a general policy of maintaining clearing and prime brokerage arrangements with BAC affiliates, such as MLPF&S and MLIB, although MLAI may engage non-BAC affiliated service providers as clearing brokers or prime brokers for the Fund.   The Fund, in its normal course of business, enters into various contracts, with MLPF&S acting as its futures clearing broker.  Pursuant to the brokerage arrangement with MLPF&S (which includes a netting arrangement), MLPF&S has the right to net receivables and payables.   Indemnifications   In the normal course of business, the Fund has entered, or may in the future enter into agreements that obligate the Fund to indemnify certain parties, including BAC affiliates, for breach of certain representations and warranties made by the Fund. No claims have actually been made with respect to such indemnities and any quantification would involve hypothetical claims that have not been made.   Based on the Fund’s experience, MLAI expects the risk of loss to be remote and, therefore, no provision has been recorded.   </div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 21, 22, 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6442-108592 false0MARKET AND CREDIT RISKSfalseMARKET AND CREDIT RISKSUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.mlwf.ml.com/role/DisclosureMarketAndCreditRisks12