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<p style="font-family: NewsGoth Dm BT; text-align: center; margin-top: 0; margin-bottom: 20px">EATON VANCE PARAMETRIC OPTION ABSOLUTE
RETURN STRATEGY FUND<br />
Supplement to Prospectus dated May 1, 2012</p>
<p style="font-family: NewsGoth Dm BT; margin-top: 0; margin-bottom: 6px">The following replaces “Fees and Expenses of the
Fund” under “Fund Summaries – Eaton Vance Parametric Option Absolute Return Strategy Fund”:</p>
<p style="font-family: NewsGoth Lt BT; line-height: 12pt; margin-top: 3px; margin-bottom: 3px">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 25 of the Fund's Prospectus and
page 21 of the Fund’s Statement of Additional Information.  </p>
<table cellspacing="0" cellpadding="0" style="margin-top: 0px; font: 9pt NewsGoth XCn BT">
<tr style="font-size: 1pt">
<td style="width: 67%"> </td>
<td style="width: 11%"> </td>
<td style="width: 11%"> </td>
<td style="width: 11%"> </td></tr>
<tr>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; padding-top: 3px; padding-bottom: 3px">Shareholder Fees (fees paid directly from your investment)</td>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Class A</td>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Class C</td>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Class I</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Maximum Sales Charge (Load) (as a percentage of offering price)</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">4.75%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">None</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">None</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Maximum Deferred Sales Charge (Load) (as a percentage of the lower of net asset value at time of purchase or redemption)</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">None</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.00%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">None</td></tr>
</table>
<p style="line-height: 9pt; margin: 0"> </p>
<table cellspacing="0" cellpadding="0" align="center" style="margin-top: 0px; font: 9pt NewsGoth XCn BT">
<tr style="font-size: 1pt">
<td style="width: 67%"> </td>
<td style="width: 11%"> </td>
<td style="width: 11%"> </td>
<td style="width: 11%"> </td></tr>
<tr>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; padding-top: 3px; padding-bottom: 3px">Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)</td>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Class A</td>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Class C</td>
<td style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Class I</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Management Fees</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.10%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.10%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.10%</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Distribution and Service (12b-1) Fees</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">0.25%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.00%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">n/a</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Other Expenses</td>
<td style="text-decoration: underline; text-align: center; padding-top: 3px; padding-bottom: 3px">0.45%</td>
<td style="text-decoration: underline; text-align: center; padding-top: 3px; padding-bottom: 3px">0.45%</td>
<td style="text-decoration: underline; text-align: center; padding-top: 3px; padding-bottom: 3px">0.45%</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Total Annual Fund Operating Expenses</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.80%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">2.55%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.55%</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Expense Reimbursement <sup>(1)</sup></td>
<td style="text-decoration: underline; text-align: center; padding-top: 3px; padding-bottom: 3px">(0.35)%</td>
<td style="text-decoration: underline; text-align: center; padding-top: 3px; padding-bottom: 3px">(0.35)%</td>
<td style="text-decoration: underline; text-align: center; padding-top: 3px; padding-bottom: 3px">(0.35)%</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="padding-top: 3px; padding-bottom: 3px">Total Annual Fund Operating Expenses After Expense Reimbursement</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.45%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">2.20%</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">1.20%</td></tr>
</table>
<p style="font-size: 1pt; margin-top: 3px; margin-bottom: 0"> </p>
<p style="font: 9pt/10pt NewsGoth XCn BT; margin-top: 0; margin-bottom: 0"><sup>(1)</sup></p>
<p style="font: 9pt/10pt NewsGoth XCn BT; text-indent: -2px; margin-top: 0; margin-bottom: 3px">The investment adviser, sub-adviser
and administrator have agreed to reimburse the Fund’s expenses to the extent that Total Annual Fund Operating Expenses exceed
1.45% for Class A shares, 2.20% for Class C shares and 1.20% for Class I shares.  This expense reimbursement will continue
through April 30, 2013.  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, sub-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.</p>
<p style="color: #3f3f3f; font-family: NewsGoth Dm BT; line-height: 12pt; margin-top: 3px; margin-bottom: 3px">Example.<font style="font-family: NewsGoth Lt BT,Times New Roman; color: #000000">
 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:</font></p>
<table cellspacing="0" cellpadding="0" style="margin-top: 0px; font: 9pt NewsGoth XCn BT">
<tr style="font-size: 1pt">
<td style="width: 36%"> </td>
<td style="width: 8%"> </td>
<td style="width: 8%"> </td>
<td style="width: 8%"> </td>
<td style="width: 8%"> </td>
<td style="width: 8%"> </td>
<td style="width: 8%"> </td>
<td style="width: 8%"> </td>
<td style="width: 8%"> </td></tr>
<tr>
<td style="background-color: #e6e6e6; border-right: #000000 1px solid; vertical-align: top"> </td>
<td colspan="4" style="border-bottom: #000000 1px solid; background-color: #e6e6e6; border-right: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Expenses with Redemption</td>
<td colspan="4" style="border-bottom: #000000 1px solid; background-color: #e6e6e6; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">Expenses without Redemption</td></tr>
<tr style="background-color: #e6e6e6">
<td style="border-bottom: #000000 1px solid; border-right: #000000 1px solid; vertical-align: top"> </td>
<td style="border-bottom: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">1 Year</td>
<td style="border-bottom: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">3 Years</td>
<td style="border-bottom: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">5 Years</td>
<td style="border-bottom: #000000 1px solid; border-right: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">10 Years</td>
<td style="border-bottom: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">1 Year</td>
<td style="border-bottom: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">3 Years</td>
<td style="border-bottom: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">5 Years</td>
<td style="border-bottom: #000000 1px solid; vertical-align: bottom; text-align: center; padding-top: 3px; padding-bottom: 3px">10 Years</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="border-right: #000000 1px solid; padding-top: 3px; padding-bottom: 3px">Class A shares</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$616</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$982</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$1,372</td>
<td style="border-right: #000000 1px solid; text-align: center; padding-top: 3px; padding-bottom: 3px">$2,463</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$616</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$982</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$1,372</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$2,463</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="border-right: #000000 1px solid; padding-top: 3px; padding-bottom: 3px">Class C shares</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$323</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$760</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$1,324</td>
<td style="border-right: #000000 1px solid; text-align: center; padding-top: 3px; padding-bottom: 3px">$2,859</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$223</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$760</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$1,324</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$2,859</td></tr>
<tr style="vertical-align: bottom; background-color: #e6e6e6">
<td style="border-right: #000000 1px solid; padding-top: 3px; padding-bottom: 3px">Class I shares</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$122</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$455</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$812</td>
<td style="border-right: #000000 1px solid; text-align: center; padding-top: 3px; padding-bottom: 3px">$1,816</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$122</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$455</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$812</td>
<td style="text-align: center; padding-top: 3px; padding-bottom: 3px">$1,816</td></tr>
</table>
<p> </p>
<p style="margin-top: 0; margin-bottom: 6px"> </p>
<table cellspacing="0" cellpadding="0" style="margin-top: 0px; font: 9pt NewsGoth XCn BT">
<tr style="font-size: 1pt">
<td style="width: 50%"> </td>
<td style="width: 50%"> </td></tr>
<tr>
<td style="vertical-align: top; font-family: NewsGoth Dm BT; padding-top: 6px; padding-bottom: 6px">December 13, 2012</td>
<td style="vertical-align: top; font-family: NewsGoth Dm BT; text-align: right; padding-top: 6px; padding-bottom: 6px">6503-12/12   PPAOARCOMMPS</td></tr>
</table>
<p style="margin-top: 0; margin-bottom: 6px"> </p>
<p style="margin-top: 0; margin-bottom: 6px"> </p>
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EOAAX
EOACX
EOAIX
The investment adviser, sub-adviser and administrator have agreed to reimburse the Fund's expenses to the extent that Total Annual Fund Operating Expenses exceed 1.45% for Class A shares, 2.20% for Class C shares and 1.20% for Class I shares. This expense reimbursement will continue through April 30, 2013. 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, sub-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.