485BPOS

As filed with the Securities and Exchange Commission on October 9, 2012

1933 Act File No. 002-27962

1940 Act File No. 811-01545

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM N-1A
	REGISTRATION STATEMENT UNDER THE SECURITIES ACT of 1933	o
	POST-EFFECTIVE AMENDMENT NO. 124	x
	REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	o
	AMENDMENT NO. 111	x
Eaton Vance Special Investment Trust
(Exact Name of Registrant as Specified in Charter)
Two International Place, Boston, Massachusetts 02110
(Address of Principal Executive Offices)
(617) 482-8260
(Registrant’s Telephone Number)
MAUREEN A. GEMMA
Two International Place, Boston, Massachusetts 02110
(Name and Address of Agent for Service)

 

It is proposed that this filing will become effective pursuant to Rule 485 (check appropriate box):
x	immediately upon filing pursuant to paragraph (b)	o	on (date) pursuant to paragraph (a)(1)
o	on (date) pursuant to paragraph (b)	o	75 days after filing pursuant to paragraph (a)(2)
o	60 days after filing pursuant to paragraph (a)(1)	o	on (date) pursuant to paragraph (a)(2)
If appropriate, check the following box:
o	This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Amendment to the Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized in the City of Boston, and the Commonwealth of Massachusetts, on October 9, 2012.

Eaton Vance Special Investment Trust

By:  /s/ Duncan W. Richardson

Duncan W. Richardson, President

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the Registration Statement has been signed below by the following persons in the capacities indicated on October 9, 2012.

Signature			Title
/s/ Duncan W. Richardson			President (Chief Executive Officer)
Duncan W. Richardson
/s/ Barbara E. Campbell			Treasurer (Principal Financial and Accounting Officer)
Barbara E. Campbell
Signature		Title		Signature	Title
Scott E. Eston*		Trustee		Ronald A. Pearlman*	Trustee
Scott E. Eston				Ronald A. Pearlman
Benjamin C. Esty*		Trustee		Helen Frame Peters*	Trustee
Benjamin C. Esty				Helen Frame Peters
Thomas E. Faust Jr.*		Trustee		Lynn A. Stout*	Trustee
Thomas E. Faust Jr.				Lynn A. Stout
Allen R. Freedman*		Trustee		Harriett Tee Taggart*	Trustee
Allen R. Freedman				Harriett Tee Taggart
William H. Park*		Trustee		Ralph F. Verni*	Trustee
William H. Park				Ralph F. Verni
*By:	/s/ Maureen A. Gemma
	Maureen A. Gemma (As attorney-in-fact)

* Pursuant to a Power of Attorney dated August 6, 2012 filed as Exhibit (q) to the Registrant’s Post-Effective Amendment No. 123 filed September 27, 2012 (Accession No. 0000940394-12-000998) and incorporated herein by reference.

EXHIBIT INDEX

Exhibit No.	Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxanomny Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
Ex-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Label

Element

Value

[RiskReturnAbstract]

rr_RiskReturnAbstract

Document Type

dei_DocumentType

485BPOS

Document Period End Date

dei_DocumentPeriodEndDate

Dec. 31, 2011

Registrant Name

dei_EntityRegistrantName

Eaton Vance Special Investment Trust

Central Index Key

dei_EntityCentralIndexKey

0000031266

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Sep. 28, 2012

Document Effective Date

dei_DocumentEffectiveDate

Sep. 28, 2012

Prospectus Date

rr_ProspectusDate

May 01, 2012

Eaton Vance Balanced Fund

[RiskReturnAbstract]

rr_RiskReturnAbstract

Supplement [Text Block]

EVSIT_SupplementTextBlock

EATON VANCE BALANCED FUND
Supplement to Prospectus dated May 1, 2012

1.  As of the date of this Supplement, Eaton Vance Balanced Fund now offers Class I Shares.

2.  The following is added to the front cover under “Eaton Vance Balanced Fund”:

Class I Shares - EIIFX   

3.  The following replaces “Fees and Expenses of the Fund” under “Fund Summaries – Eaton Vance Balanced Fund”:

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 44 of this Prospectus and page 25 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)	Class A	Class B	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	5.75%	None	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	5.00%	1.00%	None

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)(1)	Class A	Class B	Class C	Class I
Management Fees	0.04%	0.04%	0.04%	0.04%
Distribution and Service (12b-1) Fees	0.25%	1.00%	1.00%	n/a
Other Expenses (estimated for Class I)	0.21%	0.21%	0.21%	0.21%
Acquired Fund Fees and Expenses(2)	0.67%	0.67%	0.67%	0.67%
Total Annual Fund Operating Expenses	1.17%	1.92%	1.92%	0.92%

⁽¹⁾

Annual Fund Operating Expenses have been restated to reflect the new contractual administrative fee rate effective June 15, 2012.

⁽²⁾

Reflects the Fund’s allocable share of the advisory fees (including contractual fee reductions) and other expenses of the Portfolios in which it invests.

Example.  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:

	Expenses with Redemption				Expenses without Redemption
	1 Year	3 Years	5 Years	10 Years	1 Year	3 Years	5 Years	10 Years
Class A shares	$ 687	$ 925	$ 1,182	$ 1,914	$ 687	$ 925	$ 1,182	$ 1,914
Class B shares	$ 695	$ 1,003	$ 1,237	$ 2,048	$ 195	$ 603	$ 1,037	$ 2,048
Class C shares	$ 295	$ 603	$ 1,037	$ 2,243	$ 195	$ 603	$ 1,037	$ 2,243
Class I shares	$ 94	$ 293	$ 509	$ 1,131	$ 94	$ 293	$ 509	$ 1,131

4.  The following is added to the first paragraph under “Performance” in “Fund Summaries – Eaton Vance Balanced Fund”:

No performance is shown for Class I shares because they have not been offered prior to the date of this Prospectus.  

5.  The following replaces the second paragraph under “Management.” in “Management and Organization”:

Eaton Vance serves as the administrator of each Fund, providing each Fund with administrative services and related office facilities.  In return, Large-Cap Growth Fund, Small-Cap Fund and Small-Cap Value Fund are authorized to pay Eaton Vance a fee of 0.15% of average daily net assets.   For the period from October 22, 2007 through June 14, 2012, Balanced Fund was authorized to pay Eaton Vance an administrative fee of up to 0.10% of average daily net assets subject to a fee reduction whereby Eaton Vance agreed to reduce such fee to the extent Balanced Fund’s combined advisory and administrative fees would otherwise exceed the amount of such fees under the fee schedules in place for the Fund and the Portfolios in which it invested as of October 15, 2007.  Effective June 15, 2012, Balanced Fund is authorized to pay Eaton Vance a fee of 0.04% of average daily net assets.  For the fiscal year ended December 31, 2011, the administration fee of Balanced Fund was 0.01% of the Fund’s average daily net assets.  For the fiscal year ended December 31, 2011, the administration fee paid by each of Large-Cap Core Research Fund, Large-Cap Growth Fund, Small-Cap Fund and Small-Cap Value Fund equaled 0.15% of average daily net assets.  Eaton Vance does not currently receive a fee for serving as administrator of Dividend Builder Fund, Large-Cap Value and Special Equities Fund.

6.  The following replaces the paragraph under “Financial Highlights” and the table is added to Eaton Vance Balanced Fund’s Financial Highlights table:

The financial highlights are intended to help you understand a Fund’s financial performance for the period(s) indicated.  Certain information in the tables reflects the financial results for a single Fund share.  The total returns in the tables represent the rate an investor would have earned (or lost) on an investment in a Fund (assuming reinvestment of all distributions at net asset value).  This information (except for the six months ended June 30, 2012 for Balanced Fund) has been audited by Deloitte & Touche LLP, an independent registered public accounting firm.  The reports of Deloitte & Touche LLP and each Fund’s financial statements are incorporated herein by reference and included in the Fund’s annual report, which is available upon request.  Financial Highlights information is not provided for Class I shares of Balanced Fund because it has not yet commenced operations prior to the date of this supplement.

		Six Months Ended June 30, 2012
		(Unaudited)
		Class A	Class B	Class C
Net asset value - Beginning of period		$6.910	$6.910	$6.940
Income (Loss) From Operations
Net investment income(1)		$0.047	$0.020	$0.020
Net realized and unrealized gain		0.377	0.387	0.387
Total income from operations		$0.424	$0.407	$0.407
Less Distributions
From net investment income		$(0.074)	$(0.047)	$(0.047)
Total distributions		$(0.074)	$(0.047)	$(0.047)
Net asset value - End of period		$7.260	$7.270	$7.300
Total Return(2)		6.15%(3)	5.89%(3)	5.87%(3)
Ratios/Supplemental Data
Net assets, end of period (000’s omitted)		$157,573	$11,809	$28,329
Ratios (as a percentage of average daily net assets):
	Expenses(4)(5)	1.18%(6)	1.93%(6)	1.93%(6)
	Net investment income	1.30%(6)	0.55%(6)	0.55%(6)
Portfolio Turnover of the Fund(7)		1%(3)	1%(3)	1%(3)
Portfolio Turnover of Investment Grade Income Portfolio		47%(3)	47%(3)	47%(3)
Portfolio Turnover of Large-Cap Core Research Portfolio		53%(3)	53%(3)	53%(3)

⁽¹⁾

Computed using average shares outstanding.

⁽²⁾

Returns are historical and are calculated by determining the percentage change in net asset value with all distributions reinvested and do not reflect the effect of sales charges.

⁽³⁾

Not annualized.

⁽⁴⁾

Includes the Fund’s share of the Portfolios’ allocated expenses.

⁽⁵⁾

Excludes the effect of custody fee credits, if any, of less than 0.005%.

⁽⁶⁾

Annualized.

⁽⁷⁾

Percentage is based on the Fund’s contributions to and withdrawals from the Portfolios and excludes the investment activity of the Portfolios.

September 28, 2012 6271-9/12 COMBEQPS2

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)(*)

Expense Footnotes [Text Block]

rr_ExpenseFootnotesTextBlock

^(*) Annual Fund Operating Expenses have been restated to reflect the new contractual administrative fee rate effective June 15, 2012.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 44 of this Prospectus and page 25 of the Fund’s Statement of Additional Information.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Expenses with Redemption

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

Expenses without Redemption

Eaton Vance Balanced Fund | Class A

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EVIFX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.04%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses (estimated for Class I)

rr_OtherExpensesOverAssets

0.21%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.67%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.17%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

687

3 Years

rr_ExpenseExampleYear03

925

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,182

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,914

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

687

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

925

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,182

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,914

Eaton Vance Balanced Fund | Class B

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EMIFX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

5.00%

Management Fees

rr_ManagementFeesOverAssets

0.04%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses (estimated for Class I)

rr_OtherExpensesOverAssets

0.21%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.67%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.92%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

695

3 Years

rr_ExpenseExampleYear03

1,003

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,237

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,048

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

195

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

603

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,037

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,048

Eaton Vance Balanced Fund | Class C

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

ECIFX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management Fees

rr_ManagementFeesOverAssets

0.04%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses (estimated for Class I)

rr_OtherExpensesOverAssets

0.21%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.67%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.92%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

295

3 Years

rr_ExpenseExampleYear03

603

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,037

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,243

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

195

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

603

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,037

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,243

Eaton Vance Balanced Fund | Class I

[RiskReturnAbstract]

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

EIIFX

Maximum Sales Charge (Load) (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.04%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses (estimated for Class I)

rr_OtherExpensesOverAssets

0.21%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.67%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.92%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

94

3 Years

rr_ExpenseExampleYear03

293

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

509

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,131

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

94

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

293

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

509

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,131

[1] Reflects the Fund's allocable share of the advisory fees (including contractual fee reductions) and other expenses of the Portfolios in which it invests.

XML

Eaton Vance Balanced Fund

EATON VANCE BALANCED FUND
Supplement to Prospectus dated May 1, 2012

1.  As of the date of this Supplement, Eaton Vance Balanced Fund now offers Class I Shares.

2.  The following is added to the front cover under “Eaton Vance Balanced Fund”:

Class I Shares - EIIFX   

3.  The following replaces “Fees and Expenses of the Fund” under “Fund Summaries – Eaton Vance Balanced Fund”:

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.  You may qualify for a reduced sales charge if you invest, or agree to invest over a 13-month period, at least $50,000 in Eaton Vance Funds.  More information about these and other discounts is available from your financial intermediary and in Sales Charges beginning on page 44 of this Prospectus and page 25 of the Fund’s Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)	Class A	Class B	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	5.75%	None	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	None	5.00%	1.00%	None

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)(1)	Class A	Class B	Class C	Class I
Management Fees	0.04%	0.04%	0.04%	0.04%
Distribution and Service (12b-1) Fees	0.25%	1.00%	1.00%	n/a
Other Expenses (estimated for Class I)	0.21%	0.21%	0.21%	0.21%
Acquired Fund Fees and Expenses(2)	0.67%	0.67%	0.67%	0.67%
Total Annual Fund Operating Expenses	1.17%	1.92%	1.92%	0.92%

⁽¹⁾

Annual Fund Operating Expenses have been restated to reflect the new contractual administrative fee rate effective June 15, 2012.

⁽²⁾

Reflects the Fund’s allocable share of the advisory fees (including contractual fee reductions) and other expenses of the Portfolios in which it invests.

Example.  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:

	Expenses with Redemption				Expenses without Redemption
	1 Year	3 Years	5 Years	10 Years	1 Year	3 Years	5 Years	10 Years
Class A shares	$ 687	$ 925	$ 1,182	$ 1,914	$ 687	$ 925	$ 1,182	$ 1,914
Class B shares	$ 695	$ 1,003	$ 1,237	$ 2,048	$ 195	$ 603	$ 1,037	$ 2,048
Class C shares	$ 295	$ 603	$ 1,037	$ 2,243	$ 195	$ 603	$ 1,037	$ 2,243
Class I shares	$ 94	$ 293	$ 509	$ 1,131	$ 94	$ 293	$ 509	$ 1,131

4.  The following is added to the first paragraph under “Performance” in “Fund Summaries – Eaton Vance Balanced Fund”:

No performance is shown for Class I shares because they have not been offered prior to the date of this Prospectus.  

5.  The following replaces the second paragraph under “Management.” in “Management and Organization”:

Eaton Vance serves as the administrator of each Fund, providing each Fund with administrative services and related office facilities.  In return, Large-Cap Growth Fund, Small-Cap Fund and Small-Cap Value Fund are authorized to pay Eaton Vance a fee of 0.15% of average daily net assets.   For the period from October 22, 2007 through June 14, 2012, Balanced Fund was authorized to pay Eaton Vance an administrative fee of up to 0.10% of average daily net assets subject to a fee reduction whereby Eaton Vance agreed to reduce such fee to the extent Balanced Fund’s combined advisory and administrative fees would otherwise exceed the amount of such fees under the fee schedules in place for the Fund and the Portfolios in which it invested as of October 15, 2007.  Effective June 15, 2012, Balanced Fund is authorized to pay Eaton Vance a fee of 0.04% of average daily net assets.  For the fiscal year ended December 31, 2011, the administration fee of Balanced Fund was 0.01% of the Fund’s average daily net assets.  For the fiscal year ended December 31, 2011, the administration fee paid by each of Large-Cap Core Research Fund, Large-Cap Growth Fund, Small-Cap Fund and Small-Cap Value Fund equaled 0.15% of average daily net assets.  Eaton Vance does not currently receive a fee for serving as administrator of Dividend Builder Fund, Large-Cap Value and Special Equities Fund.

6.  The following replaces the paragraph under “Financial Highlights” and the table is added to Eaton Vance Balanced Fund’s Financial Highlights table:

The financial highlights are intended to help you understand a Fund’s financial performance for the period(s) indicated.  Certain information in the tables reflects the financial results for a single Fund share.  The total returns in the tables represent the rate an investor would have earned (or lost) on an investment in a Fund (assuming reinvestment of all distributions at net asset value).  This information (except for the six months ended June 30, 2012 for Balanced Fund) has been audited by Deloitte & Touche LLP, an independent registered public accounting firm.  The reports of Deloitte & Touche LLP and each Fund’s financial statements are incorporated herein by reference and included in the Fund’s annual report, which is available upon request.  Financial Highlights information is not provided for Class I shares of Balanced Fund because it has not yet commenced operations prior to the date of this supplement.

		Six Months Ended June 30, 2012
		(Unaudited)
		Class A	Class B	Class C
Net asset value - Beginning of period		$6.910	$6.910	$6.940
Income (Loss) From Operations
Net investment income(1)		$0.047	$0.020	$0.020
Net realized and unrealized gain		0.377	0.387	0.387
Total income from operations		$0.424	$0.407	$0.407
Less Distributions
From net investment income		$(0.074)	$(0.047)	$(0.047)
Total distributions		$(0.074)	$(0.047)	$(0.047)
Net asset value - End of period		$7.260	$7.270	$7.300
Total Return(2)		6.15%(3)	5.89%(3)	5.87%(3)
Ratios/Supplemental Data
Net assets, end of period (000’s omitted)		$157,573	$11,809	$28,329
Ratios (as a percentage of average daily net assets):
	Expenses(4)(5)	1.18%(6)	1.93%(6)	1.93%(6)
	Net investment income	1.30%(6)	0.55%(6)	0.55%(6)
Portfolio Turnover of the Fund(7)		1%(3)	1%(3)	1%(3)
Portfolio Turnover of Investment Grade Income Portfolio		47%(3)	47%(3)	47%(3)
Portfolio Turnover of Large-Cap Core Research Portfolio		53%(3)	53%(3)	53%(3)

⁽¹⁾

Computed using average shares outstanding.

⁽²⁾

Returns are historical and are calculated by determining the percentage change in net asset value with all distributions reinvested and do not reflect the effect of sales charges.

⁽³⁾

Not annualized.

⁽⁴⁾

Includes the Fund’s share of the Portfolios’ allocated expenses.

⁽⁵⁾

Excludes the effect of custody fee credits, if any, of less than 0.005%.

⁽⁶⁾

Annualized.

⁽⁷⁾

Percentage is based on the Fund’s contributions to and withdrawals from the Portfolios and excludes the investment activity of the Portfolios.

September 28, 2012 6271-9/12 COMBEQPS2

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Eaton Vance Balanced Fund	Class A	Class B	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	5.75%	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at purchase or redemption)	none	5.00%	1.00%	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)(*)

Annual Fund Operating Expenses Eaton Vance Balanced Fund		Class A	Class B	Class C	Class I
Management Fees		0.04%	0.04%	0.04%	0.04%
Distribution and Service (12b-1) Fees		0.25%	1.00%	1.00%	none
Other Expenses (estimated for Class I)		0.21%	0.21%	0.21%	0.21%
Acquired Fund Fees and Expenses	[1]	0.67%	0.67%	0.67%	0.67%
Total Annual Fund Operating Expenses		1.17%	1.92%	1.92%	0.92%

^(*) Annual Fund Operating Expenses have been restated to reflect the new contractual administrative fee rate effective June 15, 2012.

Expenses with Redemption

Expense Example Eaton Vance Balanced Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	687	925	1,182	1,914
Class B	695	1,003	1,237	2,048
Class C	295	603	1,037	2,243
Class I	94	293	509	1,131

Expenses without Redemption

Expense Example, No Redemption Eaton Vance Balanced Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	687	925	1,182	1,914
Class B	195	603	1,037	2,048
Class C	195	603	1,037	2,243
Class I	94	293	509	1,131

[1] Reflects the Fund's allocable share of the advisory fees (including contractual fee reductions) and other expenses of the Portfolios in which it invests.