Fund Summary

The Fund’s investment objective is total return.

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Shareholder Fees	Eaton Vance Parametric Structured Absolute Return Fund Class I
Shareholder Fees Column [Text]	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none

Example.

Expenses with Redemption

Expenses without Redemption

Portfolio Turnover

Principal Investment Strategies

Principal Risks

Performance

Investment Objective

Fees and Expenses of the Fund

Shareholder Fees (fees paid directly from your investment)

Annual Fund Operating Expenses		Eaton Vance Multi-Strategy All Market Fund	Eaton Vance Multi-Strategy All Market Fund Class A	Eaton Vance Multi-Strategy All Market Fund Class C	Eaton Vance Multi-Strategy All Market Fund Class I
Operating Expenses Caption [Text]	^[1]	Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)
Operating Expenses Column [Text]			Class A	Class C	Class I
Management Fees			none	none	none
Distribution and Service (12b-1) Fees			0.25%	1.00%
Other Expenses (estimated)			0.16%	0.16%	0.16%
Acquired Fund Fees and Expenses (estimated)	^[2]		0.94%	0.94%	0.94%
Total Annual Fund Operating Expenses			1.35%	2.10%	1.10%

[1]	Expenses in the table above and the Example below reflect the expenses of the Fund and the Portfolios.
[2]	Reflects the Fund's estimated allocable share of the advisory fee and other expenses of the Portfolios in which it invests.

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Eaton Vance Multi-Strategy All Market Fund (USD $)	Expense Example, By Year, Column [Text]	1 Year	3 Years
Class A	Class A shares	606	882
Class C	Class C shares	313	658
Class I	Class I shares	112	350

Expense Example, No Redemption Eaton Vance Multi-Strategy All Market Fund (USD $)	Expense Example, No Redemption, By Year, Column [Text]	1 Year	3 Years
Class A	Class A shares	606	882
Class C	Class C shares	213	658
Class I	Class I shares	112	350

The Fund and the Portfolios in which it invests (see below) pay transaction costs, such as commissions, when they buy and sell securities (or “turns over” the portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance.

The Fund is a “fund of funds” and seeks to achieve its investment objective of total return primarily by allocating its assets among other registered investment companies managed by Eaton Vance and its affiliates that invest in various asset classes (the “Portfolios”). The Fund also may hold investments directly. Total return is defined as income plus capital appreciation. The Fund’s portfolio managers, taking market and other factors into consideration, determine the allocation of the Fund’s assets among the Portfolios. Set forth below is a description of the Fund’s approach, the characteristics and risks associated with the principal investments and strategies of the Fund as a result of its investments in the Portfolios and its direct investments.

The Fund has a flexible investment strategy and will invest in a variety of securities and other investments and use a variety of investment techniques in pursuing its investment objective. Under normal market conditions, the investment adviser targets Fund performance volatility ranging between approximately 4% and 14% annually. The Fund’s actual, or realized, volatility for longer or shorter periods may, however, be materially higher or lower than the target range, depending on market conditions. The Fund’s assets are not invested according to a predetermined allocation. In making investment decisions on behalf of the Fund, the investment adviser combines fundamental analysis, quantitative portfolio optimization and risk management techniques, seeking to invest in markets and market sectors that it believes offers favorable risk-adjusted return prospects. The investment adviser considers the relative risk/return characteristics of prospective investments in determining desired exposures and the most efficient means for achieving them.

The Fund is “non-diversified”, which means it may invest a greater percentage of its assets in the securities of a single issuer than a “diversified” fund. The Fund may allocate its assets among different types of investments at different times, and is not required to hold stocks, bonds, cash instruments or other investments in any fixed proportion or to maintain minimum allocations to any class of investments. The Fund may invest in individual securities of any credit quality, including those rated below investment grade (so-called “junk”), without limit. The Fund’s investments may include sovereign debt, corporate debt, municipal obligations, mortgage-backed securities, inflation-linked debt securities and commodities-related investments. The Fund may invest in zero coupon bonds, deferred interest bonds, bonds or preferred stocks on which the interest is payable in-kind (“PIK securities”), and debt obligations that are issued at a significant discount from face value (collectively, “deep discount bonds”). The Fund may invest in common and preferred stocks of companies of any capitalization, real estate investment trusts, exchange-traded funds (“ETFs”), including commodity related ETFs, exchange-traded notes (“ETNs”) and other pooled investment vehicles. The Fund may also gain exposure to commodity markets by investing in certain Portfolios that invest in commodities and commodity-related investments. Each such Portfolio may invest up to 25% of its assets in a wholly-owned subsidiary organized under the laws of the Cayman Islands, which invests primarily in commodity-related instruments (the “Subsidiary”). The Fund may invest in both developed and emerging markets.

The Fund expects to achieve certain investment exposures primarily through derivative transactions, including (but not limited to): the purchase or sale of futures contracts on securities, indices or other financial instruments or currencies; options on futures contracts; deliverable and non-deliverable (“NDF”) forward foreign currency exchange contracts (“forwards”); exchange-traded and over-the-counter options on securities, indices or currencies; interest rate, total return, inflation and credit default swaps; forward rate agreements; and credit linked notes and other similarly structured products, including, but not limited to, instruments that have a greater or lesser credit risk than the security underlying that instrument. The Fund may engage in derivative transactions to seek total return, to hedge against fluctuations in securities prices, interest rates or currency exchange rates, to change the effective duration of its portfolio, to manage certain investment risks (including volatility risk) and/or as a substitute for the purchase or sale of securities, currencies or commodities. Certain derivative transactions may create leverage in the Fund. The Fund’s use of derivatives may be extensive. The Fund may seek to generate incremental return by writing a series of call and put option spread transactions on the S&P 500 Composite Stock Price Index (S&P 500 Index) and/or a proxy for the S&P 500 Index (such as SPDR Trust Series 1 (SPDRs)). The Fund may engage in repurchase agreements, reverse repurchase agreements, forward commitments, short sales and securities lending. The Fund may seek to increase income by lending its securities. The Fund may sell securities and other instruments short.

Debt Market Risk. Economic and other events (whether real or perceived) can reduce the demand for investments held by the Fund, which may reduce their market prices and cause the value of Fund shares to fall. The frequency and magnitude of such changes cannot be predicted. Certain securities and other investments held by the Fund can experience downturns in trading activity and, at such times, the supply of such instruments in the market may exceed the demand. At other times, the demand for such instruments may exceed the supply in the market. An imbalance in supply and demand in the market may result in valuation uncertainties and greater volatility, less liquidity, wider trading spreads and a lack of price transparency in the market. No active trading market may exist for certain investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such assets. Adverse market conditions may impair the liquidity of some actively traded investments.

Foreign and Emerging Market Investment Risk. Because the Fund can invest a significant portion of its assets in foreign instruments, the value of Fund shares can be adversely affected by changes in currency exchange rates and political, economic and market developments abroad. In emerging or less developed countries, these risks can be more significant. Investment markets in emerging market countries are typically substantially smaller, less liquid and more volatile than the major markets in developed countries. As a result, Fund share values may be more volatile than if it invested only in developed markets. Emerging market countries may have relatively unstable governments and economies. Emerging market investments often are subject to speculative trading, which typically contributes to volatility. Trading in foreign and emerging markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country. The value of investments denominated in foreign currencies can be adversely affected by changes in foreign currency exchange rates. Depositary receipts are subject to many of the risks associated with investing directly in foreign securities, including political, economic and market risks.

Derivatives Risk. The use of derivatives can lead to losses because of adverse movements in the price or value of the asset, index, rate or instrument underlying a derivative, due to failure of a counterparty or due to tax or regulatory constraints. Derivatives may create economic leverage in the Fund, which magnifies the Fund’s exposure to the underlying investment. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a position or security, rather than solely to hedge the risk of a position or security held by the Fund. Derivatives intended for hedging purposes may not reduce risk if they are not sufficiently correlated to the position being hedged. The use of derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. Derivative instruments may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying instrument. If a derivatives’ counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in the return of collateral or other assets held by the counterparty. The loss on derivative transactions may substantially exceed the initial investment. The Fund’s use of derivatives may be extensive.

Risk of Leveraged Investments. Certain Fund transactions may give rise to a form of leverage. Such transactions may include, among others, reverse repurchase agreements, dollar rolls, borrowing, loans of portfolio securities and the use of when-issued, delayed delivery or forward commitment transactions, short sales and derivatives. The Fund is required to segregate liquid assets or otherwise cover the Fund’s obligation created by a transaction that may give rise to leverage. The use of leverage may cause the Fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations or to meet segregation requirements. Leverage may cause the Fund to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities. The loss on leveraged investments may substantially exceed the initial investment.

S&P 500 Index and SPDR Risk. Call and put spreads employed by the Fund may be based on the S&P 500 Index or on SPDRs. In the case of the S&P 500 Index, returns realized on the Fund’s call and put spread positions over each roll cycle will be determined primarily by the performance of the S&P 500 Index. If the S&P 500 Index appreciates or depreciates sufficiently over the period to offset the net premium received, the Fund will incur a net loss. The amount of potential loss in the event of a sharp market movement is subject to a cap defined by the difference in strike prices between written and purchased call and put options, and the notional value of the positions. SPDRs represent share interests in an exchange-traded fund that seeks to replicate the performance of the S&P 500 Index. The value of SPDRs is subject to change as the values of the component securities fluctuate. The performance of SPDRs may not exactly match the performance of the S&P 500 Index. SPDR options do not qualify as “section 1256 contracts” and disposition of any SPDR options utilized will likely result in short-term or long-term capital gains or losses, depending on the holding period. SPDRs reflect the underlying risks of the S&P 500 Index and SPDR options are subject to the same risks as S&P 500 Index options.

Inflation-Linked Security Risk. Inflation-linked debt securities are subject to the effects of changes in market interest rates caused by factors other than inflation (real interest rates). In general, the price of an inflation-linked security tends to decrease when real interest rates increase and increase when real interest rates decrease. Interest payments on inflation-linked securities may vary widely and will fluctuate as the principal and interest are adjusted for inflation. Any increase in the principal amount of an inflation-linked debt security will be considered taxable ordinary income, even though the Fund will not receive the principal until maturity. There can be no assurance that the inflation index used will accurately measure the real rate of inflation in the prices of goods and services. The Fund’s investments in inflation-linked securities may lose value in the event that the actual rate of inflation is different than the rate of the inflation index.

Credit Risk. Investment in debt obligations are subject to the risk of non-payment of scheduled principal and interest. Changes in economic conditions or other circumstances may reduce the capacity of the party obligated to make principal and interest payments on such instruments and may lead to defaults. Such non-payments and defaults may reduce the value of Fund shares and income distributions. The value of a debt obligation also may decline because of concerns about the issuer’s ability to make principal and interest payments. In addition, the credit ratings of income securities and bank loans may be lowered if the financial condition of the party obligated to make payments with respect to such instruments changes. Credit ratings assigned by rating agencies are based on a number of factors and do not necessarily reflect the issuer’s current financial condition or the volatility or liquidity of the security. In the event of bankruptcy of the issuer of income securities and bank loans, the Fund could experience delays or limitations with respect to its ability to realize the benefits of any collateral securing the instrument. In order to enforce its rights in the event of a default, bankruptcy or similar situation, the Fund may be required to retain legal or similar counsel. This may increase the Fund’s operating expenses and adversely affect net asset value.

Risk of Lower Rated Investments. Investments rated below investment grade and comparable unrated securities have speculative characteristics because of the credit risk associated with their issuers. Changes in economic conditions or other circumstances typically have a greater effect on the ability of issuers of lower rated investments to make principal and interest payments than they do on issuers of higher rated investments. An economic downturn generally leads to a higher non-payment rate, and a lower rated investment may lose significant value before a default occurs. Lower rated investments generally are subject to greater price volatility and illiquidity than higher rated investments.

Interest Rate Risk. As interest rates rise, the value of certain fixed income securities is likely to decline. Conversely, when interest rates decline, the value of such securities is likely to rise. Securities with longer maturities are more sensitive to changes in interest rates than those with shorter maturities, making them more volatile. A rising interest rate environment may extend the average life of mortgages or other asset-backed receivables underlying mortgage-backed or asset-backed securities. This extension increases the risk of depreciation due to future increases in market interest rates. In a declining interest rate environment, prepayment of callable income investments may increase. In such circumstances, the Fund may have to reinvest the prepayment proceeds at lower yields.

Risk of U.S. Government-Sponsored Agencies. Although certain U.S. Government-sponsored agencies (such as the Federal Home Loan Mortgage Corporation and Fannie Mae) may be chartered or sponsored by acts of Congress, their securities are neither issued nor guaranteed by the U.S. Treasury.

Risks of Repurchase Agreements and Reverse Repurchase Agreements. In the event of the insolvency of the counterparty to a repurchase agreement or reverse repurchase agreement, recovery of the repurchase price owed to the Fund or, in the case of a reverse repurchase agreement, the securities sold by the Fund, may be delayed. In a repurchase agreement, such an insolvency may result in a loss to the extent that the value of the purchased securities decreases during the delay. In a reverse repurchase agreement, the counterparty’s insolvency may result in a loss equal to the amount by which the value of the securities sold by the Fund exceeds the repurchase price payable by the Fund; if the value of the purchased securities increases during such a delay, that loss may also be increased. When the Fund enters into a reverse repurchase agreement, any fluctuations in the market value of either the securities transferred to another party or the securities in which the proceeds may be invested would affect the market value of the Fund’s assets. As a result, such transactions may increase fluctuations in the net asset value of the Fund’s shares. Because reverse repurchase agreements may be considered to be the practical equivalent of borrowing funds, they constitute a form of leverage. If the Fund reinvests the proceeds of a reverse repurchase agreement at a rate lower than the cost of the agreement, entering into the agreement will lower the Fund’s yield.

Risks of Zero-Coupon and Deep Discount Bonds and PIK Securities. Zero-coupon and deep discount bonds may experience greater volatility in market value due to changes in interest rates. The Fund accrues income on the discount amortization of these investments, which it is required to distribute each year. The Fund may be required to sell investments to obtain cash needed for income distributions. Securities purchased on a when-issued or forward commitment basis are subject to the risk that when delivered they will be worth less than the agreed upon payment price. Bonds and preferred stocks that make “in-kind” payments and other securities that do not pay regular income distributions may experience greater volatility in response to interest rate changes and issuer developments.

Risks of Commodity-Related Investments. The value of commodities investments will generally be affected by overall market movements and factors specific to a particular industry or commodity, which may include weather, embargoes, tariffs, and health, political, international and regulatory developments. Economic and other events (whether real or perceived) can reduce the demand for commodities, which may reduce market prices and cause the value of the Fund’s commodities investments to fall. The frequency and magnitude of such changes cannot be predicted. Exposure to commodities and commodities markets may subject the Fund to greater volatility than investments in traditional securities. No active trading market may exist for certain commodities investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such investments. In addition, adverse market conditions may impair the liquidity of actively traded commodities investments. Certain types of commodities instruments (such as total return swaps and commodity-linked notes) are subject to the risk that the counterparty to the instrument will not perform or will be unable to perform in accordance with the terms of the instrument.

Subsidiary Risk. By investing in certain Portfolios, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments, which generally include commodity-related investments. The Subsidiary is not registered under the Investment Company Act of 1940 (“1940 Act”), and is not subject to all of the provisions of the 1940 Act. These Portfolios have received or have applied for a private letter ruling from the Internal Revenue Service (“IRS”) with respect to its investment in the Subsidiary. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as described in this Prospectus and the Statement of Additional Information and could adversely affect the Fund’s investment approach.

Tax Risk. The Fund may gain exposure to the commodity markets through investments in commodity-linked derivative instruments, including commodity-linked swap agreements, commodity-linked notes, commodity options and futures, and options on commodity futures. The Fund may also gain exposure indirectly to commodity markets through a Portfolio’s investment in the Subsidiary. In order for the Fund to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code (the “Code”), the Fund must derive at least 90 percent of its gross income each taxable year from certain qualifying sources of income. Direct investments in many commodity investments by a mutual fund generate income that is not from a qualified source for purposes of meeting this 90 percent test. Numerous mutual funds have obtained private letter rulings from the IRS that provide that income produced by certain types of commodity-linked notes or wholly-owned subsidiaries (like the Subsidiary) constitute qualifying income. The Fund has been advised by tax counsel that income from certain commodity-linked notes should be qualifying income and that income derived from a wholly-owned subsidiary that invests in commodity-related investments should also constitute qualifying income. Portfolios have received or applied to the IRS for a private letter ruling related to commodity-linked notes and exposure in the Subsidiary. With respect to the pending ruling requests, the IRS has indicated that it has suspended issuance of the rulings. Should the IRS take action that adversely affects the tax treatment of a fund’s use of commodity-linked notes, or a subsidiary, it could limit the Fund’s ability to pursue its investment objective, as described. The Fund also may incur transaction and other costs to comply with any new or additional guidance from the IRS. The tax treatment of commodity-linked derivatives and income from the Subsidiary also may be adversely affected by future legislation, Treasury Regulations and/or guidance issued by the IRS that could affect the character, timing and/or amount of the Fund’s taxable income or any gains and distributions made by the Fund.

Municipal Bond Risk. The amount of public information available about municipal bonds is generally less than for corporate equities or bonds, meaning that the investment performance of municipal bond investments may be more dependent on the analytical abilities of the investment adviser than stock or corporate bond investments. The secondary market for municipal bonds also tends to be less well-developed and less liquid than many other securities markets, which may limit an owner’s ability to sell its bonds at attractive prices. The spread between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress. Less liquid obligations can become more difficult to value and be subject to erratic price movements. The increased presence of non-traditional participants or the absence of traditional participants in the municipal markets may lead to greater volatility in the markets.

Equity Investing Risk. The Fund’s shares may be sensitive to stock market volatility and the stocks in which the Fund invests may be more volatile than the stock market as a whole. The value of equity investments and related instruments may decline in response to conditions affecting the general economy; overall market changes; local, regional or global political, social or economic instability; and currency, interest rate and commodity price fluctuations, as well as issuer or sector specific events. Market conditions may affect certain types of stock to a greater extent than other types of stocks. If the stock market declines, the value of Fund shares will also likely decline and although stock values can rebound, there is no assurance that values will return to previous levels. Preferred stocks may also be sensitive to changes in interest rates. When interest rates rise, the value of preferred stocks will generally fall.

Real Estate Investment Trust Risk. Real estate investment trusts (“REITs”) are subject to special risks associated with real estate. Securities of companies in the real estate industry are sensitive to factors such as changes in real estate values, property taxes, interest rates, cash flow of underlying real estate assets, occupancy rates, government regulations affecting zoning, land use, and rents, and the management skill and creditworthiness of the issuer. Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws, among others. Changes in underlying real estate values may have an exaggerated effect to the extent that REITs concentrate investments in particular geographic regions or property types.

Smaller Company Equity Risk. The stocks of smaller, less seasoned companies are generally subject to greater price fluctuations, limited liquidity, higher transaction costs and higher investment risk. Smaller companies may have limited product lines, markets or financial resources, may be dependent on a limited management group, and may lack substantial capital reserves or an established performance record. There may be generally less publicly available information about such companies than for larger, more established companies.

ETF Risks. Investing in an ETF exposes the Fund to all of the risks of that ETF’s investments and subjects it to a pro rata portion of the ETF’s fees and expenses. As a result, the cost of investing in ETF shares may exceed the costs of investing directly in its underlying investments. ETF shares trade on an exchange at a market price which may vary from the ETF’s net asset value. The Fund may purchase ETFs at prices that exceed the net asset value of their underlying investments and may sell ETF investments at prices below such net asset value. Because the market price of ETF shares depends on the demand in the market for them, the market price of an ETF may be more volatile than the underlying portfolio of securities the ETF is designed to track, and the Fund may not be able to liquidate ETF holdings at the time and price desired, which may impact Fund performance.

ETN Risks. ETNs are debt obligations and their payments of interest or principal are linked to the performance of a reference investment (typically an index). ETNs are subject to the performance of their issuer and may lose all or a portion of their entire value if the issuer fails or its credit rating changes. An ETN that is tied to a specific index may not be able to replicate and maintain exactly the composition and weighting of the components of that index. ETNs also incur certain expenses not incurred by the reference investment and the cost of owning an ETN may exceed the cost of investing directly in the reference investment. The market trading price of an ETN may be more volatile than the reference investment it is designed to track. The Fund may purchase an ETN at prices that exceed its net asset value and may sell such investments at prices below such net asset value. The Fund may not be able to liquidate ETN holdings at the time and price desired, which may impact Fund performance.

Securities Lending Risk. Securities lending involves possible delay in recovery of the securities or possible loss of rights in the collateral should the borrower fail financially. As a result, the value of Fund shares may fall and there may be a delay in recovering the loaned securities. The value of Fund shares could also fall if a loan is called and the Fund is required to liquidate reinvested collateral at a loss or if the investment adviser is unable to reinvest cash collateral at rates that exceed the costs involved.

Issuer Diversification Risk. The Fund is “non-diversified” which means it may invest a greater percentage of its assets in the securities of a single issuer than funds that are “diversified.” Non-diversified funds face the risk of focusing investments in a small number of issuers, making them more susceptible to risks affecting such issuers than a more diversified fund might be.

Short Sale Risk. Short sale risks include, among others, the potential loss of more money than the actual cost of the investment, and the risk that the third party to the short sale may fail to honor its contract terms, causing a loss to the Fund.

Risks Associated with Active Management. The Fund is an actively managed portfolio and its success depends upon the investment skills and analytical abilities of the investment adviser to develop and effectively implement strategies to achieve the Fund’s investment objective. Subjective decisions made by the investment adviser may cause the Fund to incur losses or to miss profit opportunities on which it may otherwise have capitalized.

General Fund Investing Risks. The Fund is not a complete investment program and you may lose money by investing in the Fund. All investments carry a certain amount of risk and there is no guarantee that the Fund will be able to achieve its investment objective. Annual Fund Operating Expenses expressed as a percentage of the Fund’s average daily net assets may change as Fund assets increase and decrease, and the Annual Fund Operating Expenses may differ in the future. Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, entity or person.

Performance history will be available for the Fund after the Fund has been in operation for one calendar year.