SUPPLEMENT TO THE CURRENTLY EFFECTIVE STATEMENTS OF ADDITIONAL INFORMATION

OF THE LISTED FUNDS:

DWS Core Plus Income Fund

DWS S&P 500 Plus Fund

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The following information replaces similar disclosure under the heading “Fund Organization” in each Fund’s Statement of Additional Information:

The Board has the authority to divide the shares of the Trust into multiple funds by establishing and designating two or more series of the Trust. The Board also has the authority to establish and designate two or more classes of shares of the Trust, or of any series thereof, with variations in the relative rights and preferences between the classes as determined by the Board; provided that all shares of a class shall be identical with each other and with the shares of each other class of the same series except for such variations between the classes, including bearing different expenses, as may be authorized by the Board and not prohibited by the 1940 Act and the rules and regulations thereunder. All shares issued and outstanding are transferable, have no pre-emptive or conversion rights (except as may be determined by the Board) and are redeemable as described in the SAI and in the prospectus. Each share has equal rights with each other share of the same class of the fund as to voting, dividends, exchanges, conversion features and liquidation. Shareholders are entitled to one vote for each full share held and fractional votes for fractional shares held.

A fund generally is not required to hold meetings of its shareholders. Under the Declaration of Trust, shareholders only have the power to vote in connection with the following matters and only to the extent and as provided in the Declaration of Trust and as required by applicable law: (a) the election, re-election or removal of one or more Trustees if a meeting of shareholders is called by or at the direction of the Board for such purpose(s), provided that the Board shall promptly call a meeting of shareholders for the purpose of voting upon the question of removal of one or more Trustees as a result of a request in writing by the holders of not less than ten percent of the outstanding shares of the Trust; (b) the termination of the Trust or a fund if, in either case, the Board submits the matter to a vote of shareholders; (c) any amendment of the Declaration of Trust that (i) would change any right with respect to any shares of the Trust or fund by reducing the amount payable thereon upon liquidation of the Trust or fund or by diminishing or eliminating any voting rights pertaining thereto, in which case the vote or consent of the holders of two-thirds of the shares of the Trust or fund outstanding and entitled to vote would be required (ii) requires shareholder approval under applicable law or (iii) the Board submits to a vote of shareholders; and (d) such additional matters as may be required by law or as the Board may determine to be necessary or desirable. Shareholders also vote upon changes in fundamental policies or restrictions.

In addition, under the Declaration of Trust, shareholders of the Trust also have the power to vote in connection with the following matters to the extent and as provided in the Declaration of Trust and as required by applicable law: (a) to the same extent as the stockholders of a Massachusetts business corporation as to whether or not a court action, proceeding or claims should or should not be brought or maintained derivatively or as a class action on behalf of the Trust or the shareholders; (b) with respect to any merger, consolidation or sale of assets; (c) with respect to any investment advisory or management contract entered into with respect to one or more funds; (d) with respect to the incorporation of the Trust or a fund; (e) with respect to any plan adopted pursuant to Rule 12b-1 (or any successor rule) under the 1940 Act; and (f) with respect to such additional matters relating to the Trust as may be required by the Declaration of Trust, the By-laws or any registration of the Trust with the SEC as an investment company under the 1940 Act.

The Declaration of Trust provides that shareholder meeting quorum requirements shall be established in the By-laws. The By-laws of the Trust currently provide that the presence in person or by proxy of the holders of thirty percent of the shares entitled to vote at a meeting shall constitute a quorum for the transaction of business at meetings of shareholders of the Trust (or of an individual series or class if required to vote separately).

On any matter submitted to a vote of shareholders, all shares of the Trust entitled to vote shall, except as otherwise provided in the By-laws, be voted in the aggregate as a single class without regard to series or classes of shares, except (a) when required by applicable law or when the Board has determined that the matter affects one or more series or classes of shares materially differently, shares shall be voted by individual series or class; and (b) when the Board has determined that the matter affects only the interests of one or more series or classes, only shareholders of such series or classes shall be entitled to vote thereon.

The Declaration of Trust provides that the Board may, in its discretion, establish minimum investment amounts for shareholder accounts, impose fees on accounts that do not exceed a minimum investment amount and involuntarily redeem shares in any such account in payment of such fees. The Board, in its sole discretion, also may cause the Trust to redeem all of the shares of the Trust or one or more series or classes held by any shareholder for any reason, to the extent permissible by the 1940 Act, including (a) if the shareholder owns shares having an aggregate net asset value of less than a specified minimum amount, (b) if a particular shareholder’s ownership of shares would disqualify a series from being a regulated investment company, (c) upon a shareholder’s failure to provide sufficient identification to permit the Trust to verify the shareholder’s identity, (d) upon a shareholder’s failure to pay for shares or meet or maintain the qualifications for ownership of a particular class or series of shares, (e) if the Board determines (or pursuant to policies established by the Board it is determined) that share ownership by a particular shareholder is not in the best interests of remaining shareholders, (f) when a fund is requested or compelled to do so by governmental authority or applicable law and (g) upon a shareholder’s failure to comply with a request for information with respect to the direct or indirect ownership of shares or other securities of the Trust. The Declaration of Trust also authorizes the Board to terminate a fund or any class without shareholder approval, and the Trust may suspend the right of shareholders to require the Trust to redeem shares to the extent permissible under the 1940 Act.

Upon the termination of the Trust or any series, after paying or adequately providing for the payment of all liabilities, which may include the establishment of a liquidating trust or similar vehicle, and upon receipt of such releases, indemnities and refunding agreements as they deem necessary for their protection, the Board may distribute the remaining Trust property or property of the series to the shareholders of the Trust or the series involved, ratably according to the number of shares of the Trust or such series held by the several shareholders of the Trust or such series on the date of termination, except to the extent otherwise required or permitted by the preferences and special or relative rights and privileges of any classes of shares of a series involved, provided that any distribution to the shareholders of a particular class of shares shall be made to such shareholders pro rata in proportion to the number of shares of such class held by each of them. The composition of any such distribution (e.g., cash, securities or other assets) shall be determined by the Trust in its sole discretion and may be different among shareholders (including differences among shareholders in the same series or class).

Under Massachusetts law, shareholders of a Massachusetts business trust could, under certain circumstances, be held personally liable for obligations of a fund. The Declaration of Trust, however, disclaims shareholder liability for acts or obligations of the fund and requires that notice of such disclaimer be given in each agreement, obligation, or instrument entered into or executed by a fund or a fund’s trustees. Moreover, the Declaration of Trust provides for indemnification out of fund property for all losses and expenses of any shareholder held personally liable for the obligations of the fund and the fund may be covered by insurance which the Board considers adequate to cover foreseeable tort claims. Thus, the risk of a shareholder incurring financial loss on account of shareholder liability is limited to circumstances in which a disclaimer is inoperative and a fund itself is unable to meet its obligations.

Please Retain This Supplement for Future Reference

October 28, 2010