Bond Fund Pros Supp 8-20-13

EATON VANCE BOND FUND
Supplement to Prospectus dated January 29, 2013

1. As of the date of this Supplement, the Fund now offers Class C Shares.

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

Class C Shares - EVBCX

3. The following replaces “Fees and Expenses of the Fund” under “Fund Summary”:

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 16 of the Fund's Prospectus and page 19 of the Fund’s Statement of Additional Information.


Shareholder Fees (fees paid directly from your investment)	Class A	Class C	Class I
Maximum Sales Charge (Load) (as a percentage of offering price)	4.75%	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


Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)	Class A	Class C	Class I
Management Fees	0.00%	0.00%	0.00%
Distribution and Service (12b-1) Fees	0.25%	1.00%	n/a
Other Expenses (estimated)	0.22%	0.22%	0.22%
Acquired Fund Fees and Expenses⁽¹⁾	0.66%	0.66%	0.66%
Total Annual Fund Operating Expenses	1.13%	1.88%	0.88%
Expense Reimbursement⁽²⁾	(0.18)%	(0.18)%	(0.18)%
Total Annual Fund Operating Expenses After Expense Reimbursement	0.95%	1.70%	0.70%

⁽¹⁾

Reflects the Fund’s allocable share of the advisory fee and other expenses of the Portfolios in which it invests.

⁽²⁾

The investment adviser and administrator have agreed to reimburse the Fund’s expenses to the extent that Total Annual Fund Operating Expenses exceed 0.95% for Class A shares, 1.70% for Class C shares and 0.70% for Class I shares. This expense reimbursement will continue through February 28, 2014. Any amendment to or a termination of this reimbursement would require written approval of the Board of Trustees. The expense reimbursement relates to ordinary operating expenses only and does not include expenses such as: brokerage commissions, acquired fund fees and expenses, interest expense, taxes or litigation expenses. Amounts reimbursed may be recouped by the investment adviser and administrator during the Fund’s current fiscal year to the extent actual expenses are less than the contractual expense cap during such year.

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	1 Year	3 Years
Class A shares	$567	$800	$567	$800
Class C shares	$273	$573	$173	$573
Class I shares	$72	$263	$72	$263

4. The following replaces “Purchase and Sale of Fund Shares” under “Fund Summary”:

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 1-800-262-1122. The minimum initial purchase or exchange into the Fund is $1,000 for each Class (with the exception of Class I) and $250,000 for Class I (waived in certain circumstances). There is no minimum for subsequent investments.

5. The following replaces the first sub-header under “Purchasing Shares”:

Class A and Class C Shares

6. The following is added under “Choosing a Share Class.” in “Purchasing Shares”:

Class C shares are offered at net asset value with no front-end sales charge. If you sell your Class C shares within one year of purchase, you generally will be subject to a contingent deferred sales charge or “CDSC”. The CDSC is deducted from your redemption proceeds. Under certain circumstances, the Class C CDSC may be waived (such as certain redemptions from tax-deferred retirement plan accounts). See “CDSC Waivers” under “Sales Charges” below. Class C shares pay distribution and service fees equal to 1.00% annually of average daily net assets. Orders for Class C shares of one or more Eaton Vance funds will be refused when the total value of the purchase (including the aggregate value of all Eaton Vance fund shares held within the purchasing shareholder’s account) is $1,000,000 or more. Investors considering cumulative purchases of $1,000,000 or more, or who, after a purchase of shares, would own shares of Eaton Vance funds with a current market value of $1,000,000 or more, should consider whether another Class of shares would be more advantageous and consult their financial intermediary.

7. The following replaces “Contingent Deferred Sale Charge.” in “Sales Charges”:

Contingent Deferred Sales Charge. Class A and Class C shares are subject to a CDSC on certain redemptions. The CDSC generally is paid to the principal underwriter. Class A shares purchased at net asset value in amounts of $1 million or more are subject to a 1.00% CDSC if redeemed within 18 months of purchase. Class C shares are subject to a 1.00% CDSC if redeemed within one year of purchase. CDSCs are based on the lower of the net asset value at the time of purchase or at the time of redemption. Shares acquired through the reinvestment of distributions are exempt from the CDSC. Redemptions are made first from shares that are not subject to a CDSC.

8. The following replaces “Distribution and Service Fees.” in “Sales Charges”:

Distribution and Service Fees. Class A and Class C shares have in effect plans under Rule 12b-1 that allow the Fund to pay distribution fees for the sale and distribution of shares (so-called “12b-1 fees”) and service fees for personal and/or shareholder account services. Class C shares pay distribution fees to the principal underwriter of 0.75% of average daily net assets annually. Because these fees are paid from Fund assets on an ongoing basis, they will increase your cost over time and may cost you more than paying other types of sales charges. The principal underwriter compensates financial intermediaries on sales of Class C shares (except exchange transactions and reinvestments) in an amount equal to 1% of the purchase price of the shares. After the first year, financial intermediaries also receive 0.75% of the value of Class C shares in annual distribution fees. Class C shares also pay service fees to the principal underwriter equal to 0.25% of average daily net assets annually. Class A shares pay distribution and service fees equal to 0.25% of average daily net assets annually. After the sale of shares, the principal underwriter receives the Class A distribution and service fees and the Class C service fees for one year and thereafter financial intermediaries generally receive 0.25% annually of average daily net assets based on the value of shares sold by such dealers for shareholder servicing performed by such financial intermediaries. Distribution and service fees are subject to the limitations contained in the sales charge rule of the Financial Industry Regulatory Authority.


August 20, 2013	7071-8/13 BONDFPS

EATON VANCE BOND FUND
Supplement to Statement of Additional Information dated January 29, 2013

1. As of the date of this Supplement, the Fund now offers Class C Shares.

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

Class C Shares - EVBCX

3. The following replaces “Suspension of Sales.” in “Purchasing and Redeeming Shares”:

Suspension of Sales. The Trust may, in its absolute discretion, suspend, discontinue or limit the offering of one or more of its classes of shares at any time. In determining whether any such action should be taken, the Trust’s management intends to consider all relevant factors, including (without limitation) the size of the Fund or class, the investment climate and market conditions, the volume of sales and redemptions of shares. The Class A and Class C Distribution Plans may continue in effect and payments may be made under the Plans following any such suspension, discontinuance or limitation of the offering of shares; however, there is no contractual obligation to continue any Plan for any particular period of time. Suspension of the offering of shares would not, of course, affect a shareholder’s ability to redeem shares.

4. The following is added as the third paragraph in “Sales Charges”:

CDSC Waiver. The CDSC applicable to Class C shares will be waived in connection with minimum required distributions from tax-sheltered retirement plans by applying the rate required to be withdrawn under the applicable rules and regulations of the Internal Revenue Service to the balance of Class C shares in your account. Any new or revised sales charge or CDSC waiver will be prospective only.

5. The following are added as the second and third paragraphs under “Distribution Plans” in “Sales Charges”:

The Trust also has in effect a compensation-type Distribution Plan for the Fund's Class C shares (the “Class C Plan”) adopted pursuant to Rule 12b-1 under the 1940 Act. Pursuant to the Class C Plan, Class C pays the principal underwriter a distribution fee, accrued daily and paid monthly, at an annual rate not exceeding 0.75% of its average daily net assets to finance the distribution of its shares. Such fees compensate the principal underwriter for the sales commissions paid by it to financial intermediaries on the sale of shares, for other distribution expenses (such as personnel, overhead, travel, printing and postage) and for interest expense. The principal underwriter is entitled to receive all distribution fees and CDSCs paid or payable with respect to Class C shares, provided that no such payments will be made that would cause the Class to exceed the maximum sales charge permitted by FINRA's NASD Conduct Rule 2830(d).

The Class C Plan also authorizes the payment of service fees to the principal underwriter, financial intermediaries and other persons in amounts not exceeding an annual rate of 0.25% of its average daily net assets for personal services, and/or the maintenance of shareholder accounts. For Class C, financial intermediaries currently receive (a) a service fee (except on exchange transactions and reinvestments) at the time of sale equal to 0.25% of the purchase price of Class C shares sold by such dealer, and (b) monthly service fees approximately equivalent to 1/12 of 0.25% of the value of Class C shares sold by such dealer. During the first year after a purchase of Class C shares, the principal underwriter will retain the service fee as reimbursement for the service fee payment made to financial intermediaries at the time of sale.


August 20, 2013