497

Eaton Vance Management

Two International Place

Boston, MA  02110

(617)482-8260

www.eatonvance.com

March 6, 2013

Securities and Exchange Commission

100 F Street, NE  

Washington, DC  20549

Attn:  Office of Filings, Information & Consumer Services

Re:

Eaton Vance Mutual Funds Trust (the “Registrant”) (1933 Act File No. 002-90946)

on behalf of Eaton Vance Parametric Structured Emerging Markets Fund           (now Parametric Emerging Markets Fund) and Eaton Vance Parametric Structured International Equity Fund (now Parametric International Equity Fund) (the “Funds”)

Ladies and Gentlemen:

On behalf of the Registrant and pursuant to Rule 497(e) under the Securities Act of 1933, as amended, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in a supplement dated February 14, 2013 to the Summary Prospectuses dated June 1, 2012 of Eaton Vance Parametric Structured Emerging Markets Fund and June 1, 2012 as revised December 13, 2012 of Eaton Vance Parametric Structured International Equity Fund.  The purpose of the filing is to submit the 497(e) filing dated February 14, 2013 in XBRL for the Fund.

If you have any questions concerning the foregoing, kindly call the undersigned at (617) 672-8509.

Very truly yours,

/s/ Deanna R. Berry

Deanna R. Berry

Assistant Vice President

XML

Eaton Vance Parametric Structured Emerging Markets Fund

EATON VANCE PARAMETRIC STRUCTURED EMERGING MARKETS FUND
Supplement to Summary Prospectus dated June 1, 2012

The following amendments to the Summary Prospectus are effective March 1, 2013.

1.  The Summary Prospectus is amended to reflect the following:  

•

The name of the Fund is changed to Parametric Emerging Markets Fund;

•

Class A and Class I shares of the Fund are renamed Investor Class and Institutional Class, respectively;

•

The front-end sales charge payable upon purchase of Investor Class shares of the Fund is eliminated;

•

The minimum initial purchase of Institutional Class shares of the Fund is changed to $50,000 (waived in certain circumstances); and

•

Class C shares of the Fund are no longer available for purchase, except by: (1) existing shareholders (including shares acquired through the reinvestment of dividends and distributions); or (2) qualified retirement plans.

2.  The following replaces the “Shareholder Fees” and “Example” tables under “Fees and Expenses of the Fund”:

Shareholder Fees (fees paid directly from your investment)	Investor Class	Class C	Institutional Class
Maximum Sales Charge (Load) (as a percentage of offering price)	None	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	1.00%	None

	Expenses with Redemption				Expenses without Redemption
	1 Year	3 Years	5 Years	10 Years	1 Year	3 Years	5 Years	10 Years
Investor Class shares	$148	$459	$792	$1,735	$148	$459	$792	$1,735
Class C shares	$322	$685	$1,175	$2,524	$222	$685	$1,175	$2,524
Institutional Class shares	$122	$381	$660	$1,455	$122	$381	$660	$1,455

3.  The following replaces the paragraph under “Purchase and Sale of Fund Shares”:

You may purchase, redeem or exchange Fund shares on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Fund shares either through your financial intermediary or directly from the Fund either by writing to the Fund, P.O. Box 9653, Providence, RI 02940-9653, or by calling 1-800-260-0761. The minimum initial purchase or exchange into the Fund is $1,000 for Investor Class and $50,000 for Institutional Class (waived in certain circumstances). There is no minimum for subsequent investments.

February 14, 2013 6626-2/13     SEMSPS

Shareholder Fees Eaton Vance Parametric Structured Emerging Markets Fund	Investor Class	Class C	Institutional Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	none	none	none
Maximum Deferred Sales Charge (as a percentage)	none	1.00%	none

Expense Example Eaton Vance Parametric Structured Emerging Markets Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Investor Class	148	459	792	1,735
Class C	322	685	1,175	2,524
Institutional Class	122	381	660	1,455

Expense Example, No Redemption Eaton Vance Parametric Structured Emerging Markets Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Investor Class	148	459	792	1,735
Class C	222	685	1,175	2,524
Institutional Class	122	381	660	1,455

XML

Label

Element

Value

[RiskReturnAbstract]

rr_RiskReturnAbstract

Document Type

dei_DocumentType

Other

Document Period End Date

dei_DocumentPeriodEndDate

Jan. 31, 2012

Registrant Name

dei_EntityRegistrantName

Eaton Vance Mutual Funds Trust

Central Index Key

dei_EntityCentralIndexKey

0000745463

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Feb. 14, 2013

Document Effective Date

dei_DocumentEffectiveDate

Feb. 14, 2013

Prospectus Date

rr_ProspectusDate

Jun. 01, 2012

Eaton Vance Parametric Structured International Equity Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Supplement [Text Block]

EVMFT_SupplementTextBlock

EATON VANCE PARAMETRIC STRUCTURED INTERNATIONAL EQUITY FUND
Supplement to Summary Prospectus dated June 1, 2012 as revised December 13, 2012

The following amendments to the Summary Prospectus are effective on March 1, 2013.

1.  The Summary Prospectus is amended to reflect the following:

•

The name of the Fund is changed to Parametric International Equity Fund;

•

Class A and Class I shares of the Fund are renamed Investor Class and Institutional Class, respectively;

•

The front-end sales charge payable upon purchase of Investor Class shares of the Fund is eliminated;

•

The minimum initial purchase of Institutional Class shares of the Fund is changed to $50,000 (waived in certain circumstances); and

•

Class C shares of the Fund will no longer be available for purchase or exchange and all existing Class C shares will convert to Investor Class shares on or about March 16, 2013.  Any Class C shares converted to Investor Class will continue to be subject to any applicable Class C contingent deferred sales charge.   

2.  The following replaces the “Shareholder Fees” and “Example” tables under “Fees and Expenses of the Fund”:

Shareholder Fees (fees paid directly from your investment)	Investor Class	Institutional Class
Maximum Sales Charge (Load) (as a percentage of offering price)	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	None

	1 Year	3 Years	5 Years	10 Years
Investor Class shares	$107	$441	$797	$1,803
Institutional Class shares	$82	$363	$665	$1,524

3.  The following replaces the paragraph under “Purchase and Sale of Fund Shares”:

You may purchase, redeem or exchange Fund shares on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Fund shares either through your financial intermediary or directly from the Fund either by writing to the Fund, P.O. Box 9653, Providence, RI 02940-9653, or by calling 1-800-260-0761. The minimum initial purchase or exchange into the Fund is $1,000 for Investor Class and $50,000 for Institutional Class (waived in certain circumstances). There is no minimum for subsequent investments.

February 14, 2013 6627-2/13     SIESPS

Eaton Vance Parametric Structured International Equity Fund | Investor Class

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EAISX

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a percentage)

rr_MaximumDeferredSalesChargeOverOther

none

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

441

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

797

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,803

Eaton Vance Parametric Structured International Equity Fund | Institutional Class

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EIISX

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a percentage)

rr_MaximumDeferredSalesChargeOverOther

none

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

82

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

363

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

665

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,524

Eaton Vance Parametric Structured Emerging Markets Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Supplement [Text Block]

EVMFT_SupplementTextBlock

EATON VANCE PARAMETRIC STRUCTURED EMERGING MARKETS FUND
Supplement to Summary Prospectus dated June 1, 2012

The following amendments to the Summary Prospectus are effective March 1, 2013.

1.  The Summary Prospectus is amended to reflect the following:  

•

The name of the Fund is changed to Parametric Emerging Markets Fund;

•

Class A and Class I shares of the Fund are renamed Investor Class and Institutional Class, respectively;

•

The front-end sales charge payable upon purchase of Investor Class shares of the Fund is eliminated;

•

The minimum initial purchase of Institutional Class shares of the Fund is changed to $50,000 (waived in certain circumstances); and

•

Class C shares of the Fund are no longer available for purchase, except by: (1) existing shareholders (including shares acquired through the reinvestment of dividends and distributions); or (2) qualified retirement plans.

2.  The following replaces the “Shareholder Fees” and “Example” tables under “Fees and Expenses of the Fund”:

Shareholder Fees (fees paid directly from your investment)	Investor Class	Class C	Institutional Class
Maximum Sales Charge (Load) (as a percentage of offering price)	None	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	1.00%	None

	Expenses with Redemption				Expenses without Redemption
	1 Year	3 Years	5 Years	10 Years	1 Year	3 Years	5 Years	10 Years
Investor Class shares	$148	$459	$792	$1,735	$148	$459	$792	$1,735
Class C shares	$322	$685	$1,175	$2,524	$222	$685	$1,175	$2,524
Institutional Class shares	$122	$381	$660	$1,455	$122	$381	$660	$1,455

3.  The following replaces the paragraph under “Purchase and Sale of Fund Shares”:

You may purchase, redeem or exchange Fund shares on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Fund shares either through your financial intermediary or directly from the Fund either by writing to the Fund, P.O. Box 9653, Providence, RI 02940-9653, or by calling 1-800-260-0761. The minimum initial purchase or exchange into the Fund is $1,000 for Investor Class and $50,000 for Institutional Class (waived in certain circumstances). There is no minimum for subsequent investments.

February 14, 2013 6626-2/13     SEMSPS

Eaton Vance Parametric Structured Emerging Markets Fund | Investor Class

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EAEMX

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a percentage)

rr_MaximumDeferredSalesChargeOverOther

none

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

148

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

459

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

792

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,735

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

148

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

459

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

792

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,735

Eaton Vance Parametric Structured Emerging Markets Fund | Class C

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ECEMX

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a percentage)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

322

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

685

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,175

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,524

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

222

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

685

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,175

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,524

Eaton Vance Parametric Structured Emerging Markets Fund | Institutional Class

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EIEMX

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (as a percentage)

rr_MaximumDeferredSalesChargeOverOther

none

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

122

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

381

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

660

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,455

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

122

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

381

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

660

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,455

XML

Eaton Vance Parametric Structured International Equity Fund

EATON VANCE PARAMETRIC STRUCTURED INTERNATIONAL EQUITY FUND
Supplement to Summary Prospectus dated June 1, 2012 as revised December 13, 2012

The following amendments to the Summary Prospectus are effective on March 1, 2013.

1.  The Summary Prospectus is amended to reflect the following:

•

The name of the Fund is changed to Parametric International Equity Fund;

•

Class A and Class I shares of the Fund are renamed Investor Class and Institutional Class, respectively;

•

The front-end sales charge payable upon purchase of Investor Class shares of the Fund is eliminated;

•

The minimum initial purchase of Institutional Class shares of the Fund is changed to $50,000 (waived in certain circumstances); and

•

Class C shares of the Fund will no longer be available for purchase or exchange and all existing Class C shares will convert to Investor Class shares on or about March 16, 2013.  Any Class C shares converted to Investor Class will continue to be subject to any applicable Class C contingent deferred sales charge.   

2.  The following replaces the “Shareholder Fees” and “Example” tables under “Fees and Expenses of the Fund”:

Shareholder Fees (fees paid directly from your investment)	Investor Class	Institutional Class
Maximum Sales Charge (Load) (as a percentage of offering price)	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	None

	1 Year	3 Years	5 Years	10 Years
Investor Class shares	$107	$441	$797	$1,803
Institutional Class shares	$82	$363	$665	$1,524

3.  The following replaces the paragraph under “Purchase and Sale of Fund Shares”:

You may purchase, redeem or exchange Fund shares on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Fund shares either through your financial intermediary or directly from the Fund either by writing to the Fund, P.O. Box 9653, Providence, RI 02940-9653, or by calling 1-800-260-0761. The minimum initial purchase or exchange into the Fund is $1,000 for Investor Class and $50,000 for Institutional Class (waived in certain circumstances). There is no minimum for subsequent investments.

February 14, 2013 6627-2/13     SIESPS

Shareholder Fees Eaton Vance Parametric Structured International Equity Fund	Investor Class	Institutional Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	none	none
Maximum Deferred Sales Charge (as a percentage)	none	none

Expense Example Eaton Vance Parametric Structured International Equity Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Investor Class	107	441	797	1,803
Institutional Class	82	363	665	1,524

Eaton Vance Parametric Structured Emerging Markets Fund

EATON VANCE PARAMETRIC STRUCTURED EMERGING MARKETS FUND
Supplement to Summary Prospectus dated June 1, 2012

The following amendments to the Summary Prospectus are effective March 1, 2013.

1.  The Summary Prospectus is amended to reflect the following:  

•

The name of the Fund is changed to Parametric Emerging Markets Fund;

•

Class A and Class I shares of the Fund are renamed Investor Class and Institutional Class, respectively;

•

The front-end sales charge payable upon purchase of Investor Class shares of the Fund is eliminated;

•

The minimum initial purchase of Institutional Class shares of the Fund is changed to $50,000 (waived in certain circumstances); and

•

Class C shares of the Fund are no longer available for purchase, except by: (1) existing shareholders (including shares acquired through the reinvestment of dividends and distributions); or (2) qualified retirement plans.

2.  The following replaces the “Shareholder Fees” and “Example” tables under “Fees and Expenses of the Fund”:

Shareholder Fees (fees paid directly from your investment)	Investor Class	Class C	Institutional Class
Maximum Sales Charge (Load) (as a percentage of offering price)	None	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	1.00%	None

	Expenses with Redemption				Expenses without Redemption
	1 Year	3 Years	5 Years	10 Years	1 Year	3 Years	5 Years	10 Years
Investor Class shares	$148	$459	$792	$1,735	$148	$459	$792	$1,735
Class C shares	$322	$685	$1,175	$2,524	$222	$685	$1,175	$2,524
Institutional Class shares	$122	$381	$660	$1,455	$122	$381	$660	$1,455

3.  The following replaces the paragraph under “Purchase and Sale of Fund Shares”:

You may purchase, redeem or exchange Fund shares on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Fund shares either through your financial intermediary or directly from the Fund either by writing to the Fund, P.O. Box 9653, Providence, RI 02940-9653, or by calling 1-800-260-0761. The minimum initial purchase or exchange into the Fund is $1,000 for Investor Class and $50,000 for Institutional Class (waived in certain circumstances). There is no minimum for subsequent investments.

February 14, 2013 6626-2/13     SEMSPS

Shareholder Fees Eaton Vance Parametric Structured Emerging Markets Fund	Investor Class	Class C	Institutional Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	none	none	none
Maximum Deferred Sales Charge (as a percentage)	none	1.00%	none

Expense Example Eaton Vance Parametric Structured Emerging Markets Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Investor Class	148	459	792	1,735
Class C	322	685	1,175	2,524
Institutional Class	122	381	660	1,455

Expense Example, No Redemption Eaton Vance Parametric Structured Emerging Markets Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Investor Class	148	459	792	1,735
Class C	222	685	1,175	2,524
Institutional Class	122	381	660	1,455

XML

Eaton Vance Parametric Structured International Equity Fund

EATON VANCE PARAMETRIC STRUCTURED INTERNATIONAL EQUITY FUND
Supplement to Summary Prospectus dated June 1, 2012 as revised December 13, 2012

The following amendments to the Summary Prospectus are effective on March 1, 2013.

1.  The Summary Prospectus is amended to reflect the following:

•

The name of the Fund is changed to Parametric International Equity Fund;

•

Class A and Class I shares of the Fund are renamed Investor Class and Institutional Class, respectively;

•

The front-end sales charge payable upon purchase of Investor Class shares of the Fund is eliminated;

•

The minimum initial purchase of Institutional Class shares of the Fund is changed to $50,000 (waived in certain circumstances); and

•

Class C shares of the Fund will no longer be available for purchase or exchange and all existing Class C shares will convert to Investor Class shares on or about March 16, 2013.  Any Class C shares converted to Investor Class will continue to be subject to any applicable Class C contingent deferred sales charge.   

2.  The following replaces the “Shareholder Fees” and “Example” tables under “Fees and Expenses of the Fund”:

Shareholder Fees (fees paid directly from your investment)	Investor Class	Institutional Class
Maximum Sales Charge (Load) (as a percentage of offering price)	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	None

	1 Year	3 Years	5 Years	10 Years
Investor Class shares	$107	$441	$797	$1,803
Institutional Class shares	$82	$363	$665	$1,524

3.  The following replaces the paragraph under “Purchase and Sale of Fund Shares”:

You may purchase, redeem or exchange Fund shares on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange Fund shares either through your financial intermediary or directly from the Fund either by writing to the Fund, P.O. Box 9653, Providence, RI 02940-9653, or by calling 1-800-260-0761. The minimum initial purchase or exchange into the Fund is $1,000 for Investor Class and $50,000 for Institutional Class (waived in certain circumstances). There is no minimum for subsequent investments.

February 14, 2013 6627-2/13     SIESPS

Shareholder Fees Eaton Vance Parametric Structured International Equity Fund	Investor Class	Institutional Class
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	none	none
Maximum Deferred Sales Charge (as a percentage)	none	none

Expense Example Eaton Vance Parametric Structured International Equity Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Investor Class	107	441	797	1,803
Institutional Class	82	363	665	1,524