UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No.    )

Filed by the Registrant  ☒

Filed by a Party other than the Registrant  ☐

Check the appropriate box:

CREDIT SUISSE COMMODITY STRATEGY FUNDS

Credit Suisse Commodity Return Strategy Fund

CREDIT SUISSE OPPORTUNITY FUNDS

Credit Suisse Floating Rate High Income Fund
Credit Suisse Strategic Income Fund
Credit Suisse Managed Futures Strategy Fund

Credit Suisse Multialternative Strategy Fund

CREDIT SUISSE TRUST
Commodity Return Strategy Portfolio

CREDIT SUISSE ASSET MANAGEMENT INCOME FUND, INC.

(Name of Registrant as Specified In Its Charter)CREDIT SUISSE HIGH YIELD BOND FUND

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

CREDIT SUISSE ASSET MANAGEMENT

INCOME FUND, INC.

OneEleven Madison Avenue

11th Floor

New York, New York 10010

(800) 293-1232

July 18, 2023

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

To Be Held on April 24, 2018Dear Shareholder:

TO THE SHAREHOLDERS OF

CREDIT SUISSE ASSET MANAGEMENT INCOME FUNDOn June 12, 2023 (the “Closing Date”), INCCredit Suisse Group AG (“CS Group”) merged with and into UBS Group AG, a global financial services company (“UBS Group”), with UBS Group remaining as the surviving company (the “Merger”).:

NOTICE IS HEREBY GIVEN Immediately prior to the Closing Date, CS Group was the ultimate parent company of the Funds’ investment adviser, Credit Suisse Asset Management, LLC (“Credit Suisse”), and sub-adviser, Credit Suisse Asset Management Limited (“Credit Suisse UK” and together with Credit Suisse, the “Credit Suisse Investment Advisers”), as applicable. As required by the Investment Company Act of 1940, as amended, each Fund’s investment advisory agreement with Credit Suisse and the sub-advisory agreement between the Credit Suisse Investment Advisers with respect to Credit Suisse Strategic Income Fund provided that the Annual Meetingagreement would automatically terminate upon its assignment. The closing of the Merger was deemed to result in an assignment of each agreement, resulting in its automatic termination as of the Closing Date. As explained in more detail in the enclosed Joint Proxy Statement, each Fund is seeking shareholder approval of a new investment advisory agreement with Credit Suisse and Credit Suisse Strategic Income Fund is seeking shareholder approval of a new sub-advisory agreement between Credit Suisse and Credit Suisse UK.

No changes to the investment objective(s), principal investment strategies and policies, principal risks, fundamental and non-fundamental investment policies, or portfolio managers (collectively, “Fund-specific changes”) (other than potential personnel changes outside of Credit Suisse’s control) of your Fund are currently contemplated as a result of the Merger. It is important to note that your Fund’s advisory fee rate under its new agreement will remain the same. Also, the contractual expense limitation agreements limiting each open-end Fund’s total net expenses (which agreements permit such Funds to reimburse Credit Suisse for advisory fees waived and/or expenses previously reimbursed under certain conditions) and Credit Suisse High Yield Bond Fund’s voluntary advisory fee waiver will continue under these Funds’ respective new agreements. Each Fund’s Board of Directors/Trustees (each, a “Board”) considered the foregoing information, among other things, in approving the new agreements.

It is anticipated that the Credit Suisse Investment Advisers will transition the investment advisory services that they currently provide to the Funds to one or more registered investment advisers affiliated with UBS Group (the “UBS Investment Advisers”) on or prior to June 12, 2024 (the “UBS Transition”). With respect to each Credit Suisse Investment Adviser, it is currently anticipated that the UBS Transition will be effected by: (i) merging the Credit Suisse Investment Adviser into a UBS Investment Adviser (with the UBS Investment Adviser surviving), (ii) transferring the Credit Suisse Investment Adviser’s investment advisory agreements with the Funds (and in the case of Credit Suisse UK, the sub-advisory agreement between Credit Suisse and Credit Suisse UK with respect to Credit Suisse Strategic Income Fund) to one or more UBS Investment Advisers, and/or (iii) having the Funds enter into new investment advisory agreements and, if applicable, sub-advisory agreements with one or more UBS Investment Advisers. These actions would be subject to approval by the Board of each Fund and, depending on the structure of the UBS Transition, may also require approval by Fund shareholders. In connection with, or following the completion of, the UBS Transition, it is possible that there could be Fund-specific changes. However, the exact structure and timing of the UBS Transition and Fund-specific changes (if any) related to the UBS Transition have not yet been finalized. Any Fund-specific changes would be implemented without shareholder approval to the extent permitted under the federal securities laws (except for any changes to a Fund’s fundamental investment policies, which would require shareholder approval). Shareholders of a Fund will be promptly notified of any material Fund-specific changes. Your vote to approve your Fund’s new investment advisory agreement with Credit Suisse is necessary to ensure that Credit Suisse and, in the case of Credit Suisse Strategic Income Fund, Credit Suisse UK, can continue to manage your Fund at least until the UBS Transition is completed within one year of the Closing Date (i.e., on or prior to June 12, 2024).

Before you vote, we encourage you to read the full text of the enclosed Joint Proxy Statement for an explanation of each of the proposals and information regarding important recent developments affecting the Funds.

Your vote on these matters is important. Even if you plan to attend and vote at the meeting, please promptly follow the enclosed instructions to submit voting instructions by telephone or over the Internet. Alternatively, you may submit voting instructions by signing and dating each proxy card and returning it in the accompanying postage-paid return envelope. In order to ensure that shares will be voted in accordance with your instructions, please submit your proxy promptly.

If you have any questions about the proposals to be voted on, please call AST Fund Solutions, LLC at (877) 674-6273.

By Order of each Board,

July 18, 2023
New York, New York

IMPORTANT INFORMATION
FOR FUND SHAREHOLDERS

While we encourage you to read the full text of the enclosed Joint Proxy Statement, for your convenience, we have provided a brief overview of the proposals to be voted on.

Questions and Answers

Credit Suisse Commodity Return Strategy Fund, a series of Credit Suisse Commodity Strategy Funds

Credit Suisse Floating Rate High Income Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Strategic Income Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Managed Futures Strategy Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Multialternative Strategy Fund, a series of Credit Suisse Opportunity Funds

Commodity Return Strategy Portfolio, a series of Credit Suisse Trust

Credit Suisse Asset Management Income Fund, Inc.

Credit Suisse High Yield Bond Fund

Each of Credit Suisse Commodity Strategy, Credit Suisse Opportunity Funds and Credit Suisse Trust is registered as an open-end management investment company under the Investment Company Act of 1940, as amended (the “Meeting”“1940 Act”), and comprises one or more series as indicated above (each such series, an “Open-End Fund”). Each of Credit Suisse Asset Management Income Fund, Inc. (NYSE American: CIK)(“CIK”) and Credit Suisse High Yield Bond Fund (“DHY”) is registered as a closed-end management investment company under the 1940 Act (each, a “Closed-End Fund”).

The enclosed joint proxy statement describes a proposal to approve a new investment advisory agreement between your Fund and Credit Suisse Asset Management, LLC (“Credit Suisse”) (each such agreement, a “New Investment Advisory Agreement”). In addition, solely with respect to Credit Suisse Strategic Income Fund (the “Strategic Income Fund”), the enclosed joint proxy statement describes a proposal to approve a new sub-advisory agreement between Credit Suisse and Credit Suisse Asset Management Limited (“Credit Suisse UK” and together with Credit Suisse, the “Credit Suisse Investment Advisers”) with respect to such Fund (the “New Sub-Advisory Agreement” and together with the New Investment Advisory Agreements, the “New Advisory Agreements”).

Shareholders of each Fund will vote separately to approve the New Investment Advisory Agreement for the Fund(s) of which they held shares on the Record Date. Only those shareholders of the Strategic Income Fund who held shares of such Fund as of the Record Date will be entitled to vote to approve the New Sub-Advisory Agreement.

Shareholder approval of a Fund’s New Investment Advisory Agreement is not contingent upon shareholder approval of any other Fund’s New Investment Advisory Agreement.

Shareholder approval of the New Sub-Advisory Agreement between Credit Suisse and Credit Suisse UK with respect to the Strategic Income Fund is contingent upon shareholder approval of the New Investment Advisory Agreement between the Strategic Income Fund and Credit Suisse. Therefore, if the shareholders of the Strategic Income Fund do not approve such Fund’s New Investment Advisory Agreement, then approval of the New Sub-Advisory Agreement for the Strategic Income Fund will be deemed null and the Board (as defined below) of the Strategic Income Fund will then consider whether other actions, if any, are warranted.

Each Fund was party to an investment advisory agreement with Credit Suisse and Credit Suisse was party to a sub-advisory agreement with Credit Suisse UK with respect to the Strategic Income Fund prior to the Closing Date (collectively, the “Prior Advisory Agreements”). As required by the 1940 Act, each Prior Advisory Agreement provided that the agreement would automatically terminate upon its assignment. The closing of the Merger was deemed to result in an assignment of each Prior Advisory Agreement, resulting in its automatic termination as of the Closing Date. Your Fund requires shareholder approval of its New Investment Advisory Agreement and the Strategic Income Fund requires shareholder approval of the New Sub-Advisory Agreement for the Funds to continue to receive investment advisory services from Credit Suisse and, in the case of the Strategic Income Fund, Credit Suisse UK.

It is anticipated that the Credit Suisse Investment Advisers will transition the investment advisory services that they currently provide to the Funds to one or more registered investment advisers affiliated with UBS Group (the “UBS Investment Advisers”) on or prior to June 12, 2024 (the “UBS Transition”) in accordance with the terms of the Time-Limited Exemption (as defined below). With respect to each Credit Suisse Investment Adviser, it is currently anticipated that the UBS Transition will be effected by: (i) merging the Credit Suisse Investment Adviser into a UBS Investment Adviser (with the UBS Investment Adviser surviving), (ii) transferring Credit Suisse’s investment advisory agreements with the Funds and, in the case of Credit Suisse UK, the sub-advisory agreement between Credit Suisse and Credit Suisse UK with respect to Credit Suisse Strategic Income Fund, to one or more UBS Investment Advisers, and/or (iii) having the Funds enter into new investment advisory agreements and, if applicable, sub-advisory agreements with one or more UBS Investment Advisers. These actions would be subject to approval by the Board of each Fund and, depending on the structure of the UBS Transition, may also require approval by Fund shareholders. In connection with, or following the completion of, the UBS Transition, it is possible that there could be changes to your Fund’s investment objective(s), principal investment strategies and policies, principal risks, fundamental and non-fundamental investment policies, or portfolio managers (collectively, “Fund-specific changes”). However, the exact structure and timing of the UBS Transition and Fund-specific changes (if any) related to the UBS Transition have not yet been finalized. Any Fund-specific changes would be implemented without shareholder approval to the extent permitted under the federal securities laws (except for any changes to a Fund’s fundamental investment policies, which would require shareholder approval). Shareholders of a Fund will be promptly notified of any material Fund-specific changes. Your vote to approve your Fund’s New Investment Advisory Agreement is necessary to ensure that Credit Suisse and, in the case of the Strategic Income Fund, Credit Suisse UK, can continue to manage your Fund until the UBS Transition is completed prior to the expiration of the Time-Limited Exemption one year after the Closing Date (i.e., on or prior to June 12, 2024).

Each Interim Advisory Agreement will terminate upon the earlier of shareholder approval of the corresponding New Advisory Agreement or 150 days following the Closing Date (i.e., November 9, 2023). Each Interim Advisory Agreement contains the same terms and conditions as the corresponding Prior Advisory Agreement except for the effective and termination dates, the termination and escrow provisions required by Rule 15a-4 under the 1940 Act and certain non-material changes. During the period that each Interim Advisory Agreement is in effect, Credit Suisse’s advisory fees and Credit Suisse UK’s sub-advisory fees will be held in an interest-bearing escrow account, pursuant to Rule 15a-4.

See “Proposal 1 and Proposal 2—Approval of a New Investment Advisory Agreement with Credit Suisse and, With Respect to the Strategic Income Fund Only, Approval of a New Sub-Advisory Agreement Between Credit Suisse and Credit Suisse UK—Background—Interim Advisory Agreements” in the Joint Proxy Statement for additional information regarding the Interim Advisory Agreements.

The Commission granted a temporary exemption from Section 9(a) on June 7, 2023 to the Credit Suisse Investment Advisers and their affiliates, as well as to UBS, effective upon the Closing Date. The Credit Suisse Investment Advisers and certain of their affiliates also applied for a permanent order, which the Commission granted on July 5, 2023. The permanent order grants: (i) a time-limited exemption from Section 9(a) to the Credit Suisse Investment Advisers and certain of their affiliates (the “Time-Limited Exemption”), which enables the Credit Suisse Investment Advisers to provide investment advisory services to the Funds until June 12, 2024 (by which point such services are anticipated to be transitioned to one or more UBS Investment Advisers in the UBS Transition), and (ii) a permanent exemption from Section 9(a) to UBS (together with the Time-Limited Exemption, the “Permanent Order”).

Following the expiration of the Time-Limited Exemption, Credit Suisse and Credit Suisse UK will be disqualified from providing investment advisory services to the Funds. Accordingly, it is anticipated that the investment advisory services that the Credit Suisse Investment Advisers currently provide to the Funds will be transitioned to one or UBS Investment Advisers within one year of the Closing Date (i.e., on or prior to June 12, 2024) as part of the UBS Transition described above; however, the exact structure and timing of the UBS Transition have not yet been finalized.

DHY Voluntary Advisory Fee Waiver. Credit Suisse is not proposing to remove or reduce the voluntary advisory fee waiver for DHY in connection with DHY’s New Investment Advisory Agreement. However, such waiver is voluntary and may be discontinued by Credit Suisse at any time.

See “Proposal 1 and Proposal 2—Approval of a New Investment Advisory Agreement with Credit Suisse and, With Respect to the Strategic Income Fund Only, Approval of a New Sub-Advisory Agreement Between Credit Suisse and Credit Suisse UK—Board Review and Approval of the New Advisory Agreements—Investment Advisory Fee Rates and Expenses” in the Joint Proxy Statement for additional information regarding the terms of the Open-End Funds’ contractual expense limitation agreements and DHY’s voluntary advisory fee waiver.

Subject to shareholder approval of the New Advisory Agreements, Credit Suisse and, in the case of the Strategic Income Fund, Credit Suisse UK, will manage the Funds until the UBS Transition is completed (i.e., on or prior to June 12, 2024). However, in connection with, or following the completion of, the UBS Transition, it is possible that there could be Fund-specific changes. The exact structure and timing of the UBS Transition and Fund-specific changes (if any) related to the UBS Transition have not yet been finalized. Any Fund-specific changes would be implemented without shareholder approval to the extent permitted under the federal securities laws (except for any changes to a Fund’s fundamental investment policies, which would require shareholder approval). Shareholders of a Fund will be promptly notified of any material Fund-specific changes.

Your vote to approve your Fund’s New Advisory Agreement(s) is necessary to ensure that Credit Suisse and, in the case of the Strategic Income Fund, Credit Suisse UK, can continue to manage your Fund until the UBS Transition is completed within one year of the Closing Date (i.e., June 12, 2024).

However, it is expected that, subject to Board approval, one or more service providers will change prior to the 12-month anniversary of the Closing Date in connection with the UBS Transition.

CREDIT SUISSE COMMODITY STRATEGY FUNDS

Credit Suisse Commodity Return Strategy Fund

CREDIT SUISSE OPPORTUNITY FUNDS

Credit Suisse Floating Rate High Income Fund
Credit Suisse Strategic Income Fund
Credit Suisse Managed Futures Strategy Fund

Credit Suisse Multialternative Strategy Fund

CREDIT SUISSE TRUST
Commodity Return Strategy Portfolio

CREDIT SUISSE ASSET MANAGEMENT INCOME FUND, INC.

CREDIT SUISSE HIGH YIELD BOND FUND

Eleven Madison Avenue, New York, New York 10010

NOTICE OF JOINT SPECIAL MEETING OF
SHAREHOLDERS

To be held on August 24, 2023

To the Shareholders of the funds listed below (each, a “Fund” and collectively, the “Funds”):

Credit Suisse Commodity Return Strategy Fund, a series of Credit Suisse Commodity Strategy Funds

Credit Suisse Floating Rate High Income Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Strategic Income Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Managed Futures Strategy Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Multialternative Strategy Fund, a series of Credit Suisse Opportunity Funds

Commodity Return Strategy Portfolio, a series of Credit Suisse Trust

Credit Suisse Asset Management Income Fund, Inc.

Credit Suisse High Yield Bond Fund

Notice is hereby given that a Joint Special Meeting of Shareholders of each Fund (the “Meeting”) will be held at the offices of Credit Suisse Asset Management, LLC, Onethe Funds, Eleven Madison Avenue, (between East 23rd and 24th Streets), 11th Floor 2B, New York, New York 10010, on Tuesday, AprilThursday, August 24, 2018, commencing2023 at 2:004 p.m., Eastern time.Time for the following purposes, which are described in the accompanying Joint Proxy Statement dated July 18, 2023:

The purpose

Shareholders of each Fund will vote separately to approve the new investment advisory agreement for the Fund(s) of which they held shares on the Record Date (as defined below) in Proposal 1. Only those shareholders of Credit Suisse Strategic Income Fund (the “Strategic Income Fund”) who held shares of such Fund as of the MeetingRecord Date will be entitled to vote to approve Proposal 2.

Shareholder approval of Proposal 1 is not contingent upon shareholder approval of Proposal 1 by any other Fund. However, Proposal 2, which is limited to consider and actthe Strategic Income Fund, is contingent upon shareholder approval of Proposal 1. Therefore, if the following proposal and to consider and act upon such other matters as may properly come before the Meeting or any adjournments thereof:

(1) To elect five (5) Directorsshareholders of the Fund.Strategic Income Fund do not approve Proposal 1, then Proposal 2 will be deemed null and the Board (as defined below) of the Strategic Income Fund will then consider whether other actions, if any, are warranted.

This item

Each of Credit Suisse Commodity Strategy Funds, a Delaware statutory trust, Credit Suisse Opportunity Funds, a Delaware statutory trust, and Credit Suisse Trust, a Massachusetts business trust, is discusseda registered open-end management investment company and is comprised of one or more series (each such series, an “Open-End Fund”). Each of Credit Suisse Asset Management Income Fund, Inc., a Maryland corporation, and Credit Suisse High Yield Bond Fund, a Delaware statutory trust, is a registered closed-end management investment company (each, a “Closed-End Fund”).

As explained in greatermore detail in the attachedenclosed Joint Proxy Statement, on June 12, 2023 (the “Closing Date”), Credit Suisse Group AG (“CS Group”) merged with and into UBS Group AG, a global financial services company (“UBS Group”), with UBS Group remaining as the surviving company (the “Merger”). Immediately prior to the Closing Date, CS Group was the ultimate parent company of Credit Suisse Asset Management, LLC (“Credit Suisse”), the Funds’ investment adviser, Credit Suisse Asset Management Limited (“Credit Suisse UK” and together with Credit Suisse, the “Credit Suisse Investment Advisers”), the Strategic Income Fund’s sub-adviser. As required by the Investment Company Act of 1940, as amended, each Fund’s investment advisory agreement with Credit Suisse and the sub-advisory agreement between the Credit Suisse Investment Advisers with respect to Credit Suisse Strategic Income Fund provided that the agreement would automatically terminate upon its assignment. The closing of the Merger was deemed to result in an assignment of each agreement, resulting in its automatic termination as of the Closing Date. Accordingly, each Fund is seeking shareholder approval of a new investment advisory agreement with Credit Suisse and Credit Suisse Strategic Income Fund is seeking shareholder approval of a new sub-advisory agreement between Credit Suisse and Credit Suisse UK.

No changes to the investment objective(s), principal investment strategies and policies, principal risks, fundamental and non-fundamental investment policies, or portfolio managers (collectively, “Fund-specific changes”) (other than potential personnel changes outside of Credit Suisse’s control) of your Fund are currently contemplated as a result of the Merger. It is important to note that your Fund’s advisory fee rate under its new agreement will remain the same. Also, the contractual expense limitation agreements limiting each open-end Fund’s total net expenses (which agreements permit such Funds to reimburse Credit Suisse for advisory fees waived and/or expenses previously reimbursed under certain conditions) and Credit Suisse High Yield Bond Fund’s voluntary advisory fee waiver will continue under these Funds’ respective new agreements. Each Fund’s Board of Directors/Trustees (each, a “Board”) considered the foregoing information, among other things, in approving the new agreements.

It is anticipated that the Credit Suisse Investment Advisers will transition the investment advisory services that they currently provide to the Funds to one or more registered investment advisers affiliated with UBS Group (the “UBS Investment Advisers”) on or prior to June 12, 2024 (the “UBS Transition”), as described in more detail in the enclosed Joint Proxy Statement. In connection with, or following the completion of, the UBS Transition, it is possible that there could be Fund-specific changes. However, the exact structure and timing of the UBS Transition and Fund-specific changes (if any) related to the UBS Transition have not yet been finalized. Any Fund-specific changes would be implemented without shareholder approval to the extent permitted under the federal securities laws (except for any changes to a Fund’s fundamental investment policies, which would require shareholder approval). Shareholders of a Fund will be promptly notified of any material Fund-specific changes. Your vote to approve your Fund’s new investment advisory agreement is necessary to ensure that Credit Suisse and, in the case of Credit Suisse Strategic Income Fund, Credit Suisse UK, can continue to manage your Fund until the UBS Transition is completed within one year of the Closing Date (i.e., on or prior to June 12, 2024).

The close of business on March 9, 2018June 23, 2023 has been fixed as the record date (“Record Date”) with respect to each Fund for the determination of the shareholders of the Fund entitled to notice of, and to vote at, the Meeting.

This notice and relatedMeeting or any postponement or adjournment thereof. The enclosed proxy material are firstis being mailed to shareholderssolicited on or about March 16, 2018.

By orderbehalf of theeach Fund’s Board of Directors or Board of Trustees, as applicable (each, a “Board”). Each shareholder who does not expect to attend the Meeting in person is requested to complete, date, sign and promptly return the enclosed proxy card. As a registered shareholder, you may also vote your proxy electronically by telephone or over the Internet by following the instructions included with your proxy card. Shareholders may make inquiries about this proxy card by telephone at (877) 674-6273. Shareholders who hold shares through a bank or other intermediary, shareholders who are the holders of a variable annuity contract or variable life insurance policy or shareholders who are participants in certain tax qualified pension and retirement plans (as discussed below), should consult their bank or intermediary, their participating insurance company or their participating qualified plan regarding their ability to revoke voting instructions after such instructions have been provided. A previously submitted proxy card can be revoked by mail (addressed to the Secretary of the applicable Fund, c/o Credit Suisse Asset Management, LLC, Eleven Madison Avenue, Floor 2B, New York, New York 10010), voting again through the toll-free number or the Internet address listed in the proxy card, or at the Meeting by executing a superseding proxy card or by submitting a notice of revocation. Merely attending the Meeting, however, will not revoke any previously submitted proxy card.

Important Notice Regarding the Availability of Proxy Materials for the Joint Special Meeting of Shareholders to Be Held on Thursday, August 24, 2023. The Joint Proxy Statement is available on the internet at: www.credit-suisse.com/us/funds.

JOHN G. POPP

Chief Executive Officer and PresidentBy Order of each Board,

WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING IN PERSON, IT IS IMPORTANT THAT YOUR SHARES BE REPRESENTED AND VOTED AT THE MEETING. ACCORDINGLY, PLEASE DATE, SIGN AND RETURN THE ENCLOSED PROXY CARD PROMPTLY. NO POSTAGE IS REQUIRED IF MAILED IN THE UNITED STATES. IT IS IMPORTANT THAT YOUR PROXY CARD BE RETURNED PROMPTLY IN ORDER TO AVOID THE ADDITIONAL EXPENSE OF FURTHER SOLICITATION.

Karen Regan

Dated: March 16, 2018Secretary of the Funds

July 18, 2023
New York, New York

Please indicate your voting instructions on the enclosed proxy card, sign and date it, and return it in the envelope provided, which needs no postage if mailed in the United States. Your vote is very important no matter how many shares you own. Please mark and mail your proxy card promptly in order to save the Funds any additional cost of further proxy solicitation and in order for the Meeting to be held as scheduled.

TABLE OF CONTENTS

Page

JOINT PROXY STATEMENT

CREDIT SUISSE COMMODITY STRATEGY FUNDS

Credit Suisse Commodity Return Strategy Fund

CREDIT SUISSE OPPORTUNITY FUNDS

Credit Suisse Floating Rate High Income Fund
Credit Suisse Strategic Income Fund
Credit Suisse Managed Futures Strategy Fund

Credit Suisse Multialternative Strategy Fund

CREDIT SUISSE TRUST
Commodity Return Strategy Portfolio

CREDIT SUISSE ASSET MANAGEMENT INCOME FUND, INC.

One

CREDIT SUISSE HIGH YIELD BOND FUND

Eleven Madison Avenue

11th Floor

New York, New York 10010

Proxy Statement for the

Annual Meeting of Shareholders

To Be Heldbe held on Tuesday, AprilAugust 24, 20182023

This joint proxy statement (the “Joint Proxy StatementStatement”) is furnished in connection with athe solicitation of proxies byon behalf of the Board of Trustees or Board of Directors, (theas applicable (each, a “Board” and collectively, the “Boards”), of each of Credit Suisse Commodity Strategy Funds, Credit Suisse Opportunity Funds, Credit Suisse Trust, Credit Suisse Asset Management Income Fund, Inc. and Credit Suisse High Yield Bond Fund in connection with the joint special meeting (the “Fund”“Meeting”) of shareholders of the funds listed below (each, a “Fund” and collectively, the “Funds”), and at any and all adjournments, postponements or delays thereof:

Credit Suisse Commodity Return Strategy Fund, a series of Credit Suisse Commodity Strategy Funds

Credit Suisse Floating Rate High Income Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Strategic Income Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Managed Futures Strategy Fund, a series of Credit Suisse Opportunity Funds

Credit Suisse Multialternative Strategy Fund, a series of Credit Suisse Opportunity Funds

Commodity Return Strategy Portfolio, a series of Credit Suisse Trust

Credit Suisse Asset Management Income Fund, Inc.

Credit Suisse High Yield Bond Fund

The Meeting was called for use at the Annual Meetingpurpose of voting on the following proposals (each, a “Proposal” and collectively, the “Proposals”), each as further described in this Joint Proxy Statement:

Shareholders of each Fund will vote separately on the new investment advisory agreement for the Fund(s) of which they held shares on the Record Date (as defined below) in Proposal 1. Only those shareholders of Credit Suisse Strategic Income Fund (the “Strategic Income Fund”) who held shares of such Fund as of the Record Date will be entitled to vote on Proposal 2.

Shareholder approval of Proposal 1 by one Fund is not contingent upon shareholder approval of Proposal 1 by any other Fund.

Proposal 2, which is limited to the Strategic Income Fund, is contingent upon shareholder approval of Proposal 1. Therefore, if the shareholders of the Strategic Income Fund do not approve Proposal 1, then Proposal 2 will be deemed null and the Board of Strategic Income Fund will then consider whether other actions, if any, are warranted. Credit Suisse Asset Management Limited (“Credit Suisse UK”), an affiliate of Credit Suisse (as defined below), acts as the sub-adviser to the Strategic Income Fund.

The Notice of Joint Special Meeting, Joint Proxy Statement and proxy card are being mailed to shareholders on or about July 20, 2023.

The Meeting will be held at the offices of Credit Suisse Asset Management, LLC (“Credit Suisse”), Onethe Funds, Eleven Madison Avenue, 11th Floor 2B, New York, New York 10010, on Tuesday, AprilThursday, August 24, 2018 (commencing2023 at 2:004 p.m., Eastern time)Time. The close of business on June 23, 2023 has been fixed as the record date (“Record Date”) with respect to each Fund for the determination of shareholders entitled to notice of, and to vote at, the Meeting and any adjournments thereof (collectively,postponement or adjournment thereof. A table of the “Meeting”)outstanding voting shares of the Funds as of the Record Date is presented in Appendix A. A Notice of Annual Meeting of Shareholders andEach share is entitled to one vote (a fractional share is entitled to a proxy card (the “Proxy”) accompany this Proxy Statement.fractional vote).

Proxy solicitations will be made primarily by mail, but solicitations may also be made by telephone or personal interviews conducted by officers or employees of theeach Fund; Credit Suisse Asset Management, LLC (“Credit Suisse”), the investment adviser to the Fund; State Street BankFunds and Trust Company,co-administrator with respect to the administrator of the Fund (the “Administrator”)Open-End Funds (as defined below); or AST Fund Solutions, LLC, (“AST”), a professional proxy solicitation firm that has been retained by Credit Suisse to assist with the Fund for a fee notdistribution of proxy materials and the solicitation and tabulation of proxies at an aggregate cost of approximately $527,000 to exceed $1,500$680,000, plus all reasonable out of pocket expenses (e.g., shareholder telephone calls) incurred on behalf of theeach Fund. All costs ofThe solicitation including (a) printing and mailing of this Proxy Statement and accompanying material, (b) the reimbursement of brokerage firms and others for their expenses in forwarding solicitation material to the beneficial owners of the Fund’s shares, (c) payment of AST for its services in soliciting Proxies and (d) supplementary solicitations to submit Proxies,cost will be borne by the Fund. This Proxy Statement and accompanying Proxy are expected to be mailed to shareholders on or about March 16, 2018.

The principal executive office of the Fund and Credit Suisse is One Madison Avenue, 10th Floor, New York, New York 10010. The principal executive office of the Administrator is One Lincoln Street, Boston, Massachusetts 02111.

The Fund’s Annual Report containing audited financial statements for the fiscal year ended December 31, 2017 has previously been furnished to all shareholders of the Fund. The Fund’s Annual Report is not to be regarded as proxy-soliciting material.

Only shareholders can attend the Meeting and any adjournment or postponement thereof. To gain admittance, if you are a shareholder of record, you must bring a form of personal identification to the Meeting, where your name will be verified against our shareholder list. If a broker or other nominee holds your shares and you plan to attend the Meeting, you should bring a recent brokerage statement showing your ownership of

1

the shares, as well as a form of personal identification. Shareholders who wish to vote in person at the Meeting must comply with all applicable conditions.

If the enclosed Proxyproxy card is properly executed and returned in time to be voted at the Meeting, the shares represented thereby will be voted in accordance with the instructions marked on the Proxy.proxy card. If no instructions are marked on the Proxy,proxy card, the Proxyproxy card will be voted “FOR” each applicable proposal presented for approval at the election ofMeeting and will be voted on any matters that may properly come before the Fund’s nominees for Director, and,Meeting in accordance with the judgment of the persons named in the Proxy on any matters that may properly come before the Meeting and that are deemed appropriate. Any shareholder giving a Proxy has the power to revoke itproxy card. A previously submitted proxy card can be revoked by mail (addressed to the Secretary of the Fund, c/o Credit Suisse Asset Management, LLC, OneEleven Madison Avenue, 9th Floor, New York, New York 10010), voting again through the toll-free number or the Internet address listed in personthe proxy card, or at the Meeting by executing a superseding Proxyproxy card or by submitting a notice of revocation. Merely attending the Meeting, however, will not revoke any previously submitted proxy card.

Each of Credit Suisse Commodity Strategy Funds (“CS Commodity Strategy Funds”), a Delaware statutory trust, Credit Suisse Opportunity Funds (“CS Opportunity Funds”), a Delaware statutory trust, and Credit Suisse Trust (“CS Trust” and collectively with CS Commodity Strategy Funds and CS Opportunity Funds, the “Trusts”), a Massachusetts business trust, is registered as an open-end management investment company under the Investment Company Act of 1940, as amended (the “1940 Act”), and comprises one or more series as indicated above (each such series, an “Open-End Fund”). For purposes of this Joint Proxy Statement, the term “shareholder” (when used to refer to the beneficial holder of ownership interests in an Open-End Fund) also includes holders of variable annuity contracts and variable life insurance policies and participants in certain tax qualified pension and retirement plans.

Each of Credit Suisse Asset Management Income Fund, Inc. (“CIK”), a Maryland corporation, and Credit Suisse High Yield Bond Fund (“DHY”), a Delaware statutory trust, is registered as a closed-end management investment company under the 1940 Act (each, a “Closed-End Fund”). The shares of common stock or common shares of beneficial interest, as applicable (“Common Shares”), of each of CIK and DHY are listed on the NYSE American.

PROPOSAL 1 AND PROPOSAL 2:

APPROVAL OF A NEW INVESTMENT ADVISORY AGREEMENT WITH CREDIT SUISSE AND, WITH RESPECT TO THE STRATEGIC INCOME FUND ONLY, APPROVAL OF A NEW SUB-ADVISORY AGREEMENT BETWEEN CREDIT SUISSE AND CREDIT SUISSE UK

Summary

You are being asked to approve a new investment advisory agreement and, in the case of the Strategic Income Fund, a new sub-advisory agreement for your Fund as a result of recent events involving Credit Suisse Group AG (“CS Group”). On June 12, 2023 (the “Closing Date”), CS Group merged with and into UBS Group AG, a global financial services company (“UBS Group”), with UBS Group remaining as the surviving company (the “Merger”), pursuant to a definitive merger agreement signed on March 19, 2023. Immediately prior to the Closing Date, CS Group was the ultimate parent company of Credit Suisse and Credit Suisse UK (together, the “Credit Suisse Investment Advisers”). The Merger has important ramifications for your Fund. Namely, each Fund’s Prior Advisory Agreement(s) (as defined below) was deemed to have automatically terminated under the terms of the agreement(s) and applicable law on the Closing Date. See “—Background—Prior Advisory Agreements” below for additional information.

Prior to the Closing Date, each Board met to approve each Fund’s New Advisory Agreement(s) and Interim Advisory Agreement(s) (each as defined below). The Interim Advisory Agreements, which took effect on the Closing Date, permit the Credit Suisse Investment Advisers to continue to provide investment advisory services to the Funds until the Funds obtain shareholder approval of the New Advisory Agreements, for a period of up to 150 days following the Closing Date (i.e., until November 9, 2023). As described below in more detail, the investment advisory services that the Credit Suisse Investment Advisers currently provide to the Funds will be transitioned to one or more UBS Investment Advisers (as defined below) within one year of the Closing Date (i.e., on or prior to June 12, 2024) as part of the UBS Transition (as defined below). See “—Background—Interim Advisory Agreements” and “—Background—New Advisory Agreements” below for additional information.

In addition, on June 7, 2023, the Credit Suisse Investment Advisers and certain of their affiliates filed an application with the Securities and Exchange Commission (the “Commission”) for temporary and permanent orders granting an exemption to the Credit Suisse Investment Advisers and their affiliates, as well as to UBS Group and its affiliates (collectively, “UBS”), from the prohibitions under Section 9(a) of the 1940 Act in connection with the Consent Judgment (as defined below) which was entered against certain of Credit Suisse’s affiliates, but did not involve any of the Funds or the services that the Credit Suisse Investment Advisers and their affiliates provided to the Funds. Section 9(a) of the 1940 Act automatically prohibits entities that are, or whose affiliates are, subject to, among other things, certain court ordered “injunctions,” from serving or acting as investment adviser of any investment company registered under the 1940 Act or a principal underwriter for any registered open-end investment company under the 1940 Act, or serving in various other capacities in respect of registered investment companies. As further described below, as a result of the Consent Judgment, the Credit Suisse Investment Advisers could be disqualified from providing investment advisory services to the Funds without such an exemption, even though they did not engage in the conduct underlying the Consent Judgment, due to the broad scope of Section 9(a) of the 1940 Act. The Commission granted a temporary exemption from Section 9(a) on June 7, 2023 to the Credit Suisse Investment Advisers and their affiliates, as well as to UBS, effective upon the Closing Date. The Credit Suisse Investment Advisers and certain of their affiliates also applied for a permanent order, which the Commission granted on July 5, 2023. The permanent order grants the Time Limited-Exemption (as defined below), which permits the Credit Suisse Investment Advisers to provide investment advisory services to the Funds for a period of 12 months following the Closing Date. Following the expiration of the Time-Limited Exemption, the Credit Suisse Investment Advisers will be disqualified from providing investment advisory services to the Funds. See “—Background—Time-Limited Exemption From Disqualification Under Section 9(a) of the 1940 Act” below for additional information.

It is important to note that, while the Funds’ investment adviser and sub-adviser, as applicable, will ultimately change within one year of the Closing Date (i.e., on or prior to June 12, 2024) as a result of the Merger and the Time-Limited Exemption, the exact timing and structure of the UBS Transition have not been finalized as of the date of this Joint Proxy Statement. Shareholder approval of Proposal 1 and Proposal 2, as applicable, is necessary for your Fund to continue to receive investment advisory services from Credit Suisse and Credit Suisse UK, as applicable, for the entirety of the Time-Limited Exemption during which changes to the Funds’ investment adviser and sub-adviser, as applicable, as well as any changes to the Funds’ other service providers, will be finalized as part of the UBS Transition. The investment advisory fee rates of the Funds will not change under the New Advisory Agreements, and no changes to the Funds’ investment objective(s), principal investment strategies and policies, principal risks, fundamental and non-fundamental investment policies or portfolio managers (collectively, “Fund-specific changes”) (other than potential personnel changes outside of Credit Suisse’s control) are currently contemplated as a result of the Merger.

The foregoing summary is intended to provide a brief overview of the discussion of Proposal 1 and Proposal 2 that follows and is qualified in its entirety by such discussion.

Background

Prior Advisory Agreements

The Trusts were party, on behalf of their respective Open-End Funds, to an Amended and Restated Investment Management Agreement, dated November 16, 2016, as further amended on May 25, 2021, with Credit Suisse (the “Prior Open-End Fund Investment Advisory Agreement”). CIK was party to an Amended and Restated Investment Management Agreement, dated November 15, 2016, as further amended on May 25, 2021, with Credit Suisse (the “Prior CIK Investment Advisory Agreement”). DHY was party to an Amended and Restated Investment Management Agreement, dated November 15, 2016, as further amended on May 25, 2021, with Credit Suisse (the “Prior DHY Investment Advisory Agreement” and collectively with the Prior Open-End Fund Investment Advisory Agreement and the Prior CIK Investment Advisory Agreement, the “Prior Investment Advisory Agreements”). Credit Suisse and Credit Suisse UK were party to a Sub-Advisory Agreement, dated August 14, 2012 with respect to the Strategic Income Fund (the “Prior Sub-Advisory Agreement” and together with the Prior Investment Advisory Agreements, the “Prior Advisory Agreements”). Each Prior Advisory Agreement was last approved by the respective Board, including a majority of the Directors or Trustees (collectively, the “Board Members”), as applicable, who are not “interested persons” (as defined in the 1940 Act) of any party to such agreement (collectively, the “Independent Board Members”), at the November 2022 15(c) Meeting (as defined below). The date of each Prior Advisory Agreement’s most recent shareholder approval is set out in Appendix B.

Each Prior Advisory Agreement provided that such agreement would automatically terminate in the event of its assignment, as required by Section 15(a) of the 1940 Act. An “assignment” of an investment advisory contract includes a direct or indirect transfer of a controlling block of the investment adviser’s outstanding voting securities (sometimes referred to as a “change of control”). Because CS Group indirectly owned 100% of the outstanding voting securities of each Credit Suisse Investment Adviser, the Merger of CS Group with and into UBS Group was deemed to result in an assignment of each Prior Advisory Agreement and, therefore, the automatic termination of each Prior Advisory Agreement on the Closing Date.

Each Fund will comply with Section 15(f) of the 1940 Act, which provides that, when a change in control of an investment adviser occurs which results in an assignment of an investment advisory agreement with a registered fund, the investment adviser or any of its affiliated persons may receive any amount or benefit in connection with the change in control transaction as long as two conditions are met. The first condition of Section 15(f) specifies that, during the three-year period immediately following the transaction resulting in the assignment, at least 75% of the fund’s board of directors must not be “interested persons” of the new investment adviser or the predecessor investment adviser (in a change of control transaction like the Merger, the new and predecessor investment adviser are the same entity). The second condition specifies that no “unfair burden” may be imposed on the fund as a result of the transaction resulting in the assignment or any express or implied terms, conditions or understandings applicable thereto. The term “unfair burden,” as defined in the 1940 Act, includes any arrangement during the two-year period after the change in control transaction whereby the investment adviser (or predecessor or successor advisers), or any “interested person” (as defined in the 1940 Act) of any such investment adviser, receives or is entitled to receive any compensation, directly or indirectly, from any person in connection with the purchase or sale of securities or other property to, from, or on behalf of the fund (other than fees for bona fide principal underwriting services) or from a fund or its security holders (other than fees for bona fide investment advisory or other services).

Interim Advisory Agreements

Rule 15a-4 under the 1940 Act permits a person to act as an investment adviser to a registered investment company under an interim advisory agreement that has not been approved by the company’s shareholders for a period of 150 days following the date on which the previous agreement was deemed to terminate (in this case, the Closing Date), subject to the requirements of the rule set out below. At the May 2023 Board Meeting (as defined below), each Fund’s Board, including a majority of the Board Members who are not “interested persons” (as defined in the 1940 Act) of the Fund, unanimously approved an interim investment advisory agreement with Credit Suisse (each, an “Interim Investment Advisory Agreement”), and the Board of the Strategic Income Fund, including a majority of the Board Members who are not “interested persons” of the Strategic Income Fund, unanimously approved an interim sub-advisory agreement between Credit Suisse and Credit Suisse UK with respect to such Fund (the “Interim Sub-Advisory Agreement” and together with the Interim Investment Advisory Agreements, the “Interim Advisory Agreements”), in each case in accordance with Rule 15a-4 and on the same terms and conditions as the Prior Advisory Agreements (except for certain differences required or permitted by Rule 15a-4). The Interim Advisory Agreements went into effect on the Closing Date. The Interim Advisory Agreements are not subject to shareholder approval, and you are not being asked to approve these agreements.

The Interim Advisory Agreement(s) for each Fund satisfy the following criteria required by Rule 15a-4 under the 1940 Act: (1) the compensation under the applicable Interim Advisory Agreement is no greater than Credit Suisse’s or Credit Suisse UK’s compensation under the respective Prior Advisory Agreement; (2) the Fund’s Board, including a majority of the Board Members who are not “interested persons” of the Fund, voted in person to approve the applicable Interim Advisory Agreement prior to the termination of the respective Prior Advisory Agreement; (3) the Fund’s Board, including a majority of the Board Members who are not “interested persons” of the respective Fund, determined that the scope and quality of services to be provided to the Fund under the applicable Interim Advisory Agreement will be at least equivalent to the scope and quality of services provided under the respective Prior Advisory Agreement; (4) the applicable Interim Advisory Agreement provides that the Fund’s Board or a majority of the Fund’s shareholders may terminate the applicable Interim Advisory Agreement at any time, without the payment of any penalty, on not more than 10 calendar days’ written notice to Credit Suisse and Credit Suisse UK, as applicable; (5) the applicable Interim Advisory Agreement contains the same terms and conditions as the respective Prior Advisory Agreement, with the exception of the effective and termination dates, the termination and escrow provisions required by Rule 15a-4 and certain differences that the Fund’s Board, including a majority of the Board Members who are not “interested persons” of the Fund,” found to be immaterial; and (6) the applicable Interim Advisory Agreement provides that (a) the compensation earned under such agreement will be held in an interest-bearing escrow account with a bank; (b) if a majority of the Fund’s shareholders approve the Fund’s respective New Advisory Agreement by the end of the 150-day period following the Closing Date, the amount in the escrow account (including interest earned) will be paid to Credit Suisse or Credit Suisse UK, as applicable; and (c) if a majority of the Fund’s shareholders do not approve the Fund’s respective New Advisory Agreement, Credit Suisse or Credit Suisse UK, as applicable, will be paid, out of the escrow account, the lesser of (i) any costs incurred in performing the Interim Advisory Agreement (plus interest earned on that amount while in escrow), or (ii) the total amount in the escrow account (plus interest earned).

New Advisory Agreements

To ensure that Credit Suisse and Credit Suisse UK, as applicable, can continue to provide investment advisory services to the Funds and that each Fund’s operations continue uninterrupted until the changes to the Fund’s investment adviser(s) as part of the UBS Transition are finalized over the course of the Time-Limited Exemption, we are asking shareholders of each Fund in Proposal 1 to approve a new investment advisory agreement with Credit Suisse (each, a “New Investment Advisory Agreement”) and, in Proposal 2, we are asking shareholders of the Strategic Income Fund to approve a new sub-advisory agreement between Credit Suisse and Credit Suisse UK with respect to such Fund (the “New Sub-Advisory Agreement” and together with the New Investment Advisory Agreements, the “New Advisory Agreements”).

Shareholder approval of Proposal 1 by one Fund is not contingent upon shareholder approval of Proposal 1 by any other Fund. However, Proposal 2, with respect to the Strategic Income Fund, is contingent upon shareholder approval of Proposal 1. Therefore, if the shareholders of the Strategic Income Fund do not approve Proposal 1, then Proposal 2 will be deemed null and the Board of that Fund will then consider whether other actions, if any, are warranted.

Copies of the New Investment Advisory Agreement for each of the Open-End Funds, CIK and DHY are attached in Appendix C, Appendix D and Appendix E, respectively. A copy of the New Sub-Advisory Agreement with respect to the Strategic Income Fund is attached in Appendix F.

At a meeting held on May 16, 2023 (the “May 2023 Board Meeting”), in anticipation of the closing of the Merger, each Board, including a majority of Independent Board Members, unanimously approved a New Investment Advisory Agreement between each Fund and Credit Suisse and the Board of the Strategic Income Fund unanimously approved the New Sub-Advisory Agreement between Credit Suisse and Credit Suisse UK with respect to such Fund. Each Fund’s New Investment Advisory Agreement and, in the case of the Strategic Income Fund, the New Sub-Advisory Agreement, as approved by the Board, is submitted for approval by the shareholders of the Fund and must be voted upon separately by shareholders of that Fund who held shares of the Fund as of the Record Date. If a Fund’s shareholders approve a New Advisory Agreement with respect to that Fund, it will go into effect upon approval by that Fund’s shareholders.

No changes to the Funds’ investment objective(s), principal investment strategies and policies, principal risks, fundamental and non-fundamental investment policies or portfolio managers (previously defined as “Fund-specific changes”) (other than potential personnel changes outside of Credit Suisse’s control) are currently contemplated as a result of the Merger. In addition, the composition of each Board has not changed and no changes to the members of the Board are currently contemplated as a result of the Merger. Each Board will continue to make decisions regarding Credit Suisse, Credit Suisse UK (as applicable), the custodian, the administrator, the distributor and the transfer agent of the Funds. No changes are being proposed to these existing service providers or the fees currently charged to the Funds by such service providers at this time.

Although no Fund-specific changes are currently contemplated as a result of the Merger, shareholders should note that the Credit Suisse Investment Advisers are expected to transition the investment advisory services that they currently provide to the Funds to one or more registered investment advisers affiliated with UBS Group (the “UBS Investment Advisers”) on or prior to June 12, 2024 (the “UBS Transition”). With respect to each Credit Suisse Investment Adviser, it is currently anticipated that the UBS Transition will be effected by: (i) merging the Credit Suisse Investment Adviser into a UBS Investment Adviser (with the UBS Investment Adviser surviving), (ii) transferring the Credit Suisse Investment Adviser’s investment advisory agreements with the Funds (and in the case of Credit Suisse UK, the sub-advisory agreement between Credit Suisse and Credit Suisse UK with respect to the Strategic Income Fund) to one or more UBS Investment Advisers, and/or (iii) having the Funds enter into new investment advisory agreements and, if applicable, sub-advisory agreements with one or more UBS Investment Advisers. These actions would be subject to approval by the Board of each Fund and, depending on the structure of the UBS Transition, may also require approval by Fund shareholders.

In connection with, or following the completion of, the UBS Transition, it is possible that there could be Fund-specific changes. In addition, subject to Board approval, the distribution services provided to the Open-End Funds by CSSU (as defined below) will be transitioned to UBS and one or more other Fund service providers may change prior to the expiration of the Time-Limited Exemption in connection with the UBS Transition. However, the exact structure and timing of the UBS Transition and Fund-specific changes (if any) related to the UBS Transition have not yet been finalized. Any Fund-specific changes would be implemented without shareholder approval to the extent permitted under the federal securities laws (except for any changes to a Fund’s fundamental investment policies, which would require shareholder approval). Shareholders of a Fund will be promptly notified of any material Fund-specific changes. Your vote to approve your Fund’s new investment advisory agreement with Credit Suisse is necessary to ensure that Credit Suisse and, in the case of the Strategic Income Fund, Credit Suisse UK, can continue to manage your Fund at least until the UBS Transition is completed prior to the expiration of the Time-Limited Exemption one year after the Closing Date (i.e., on or prior to June 12, 2024).

Time-Limited Exemption from Disqualification Under Section 9(a) of the 1940 Act

In determining how to vote for the Proposals, shareholders should carefully consider the Time-Limited Exemption (as defined below) for which Credit Suisse, Credit Suisse UK and certain of their affiliates have applied to the Commission. The investment advisory services that the Credit Suisse Investment Advisers currently provide to the Funds will be transitioned to one or more UBS Investment Advisers in the UBS Transition and the distribution services that Credit Suisse Securities (USA) LLC (“CSSU”) provides to the Open-End Funds will be transitioned to one or more UBS distributors on or prior to the expiration of the Time-Limited Exemption.

On December 17, 2013, the New Jersey Bureau of Securities filed a complaint in the Superior Court of New Jersey, Mercer County Chancery Division (the “Court”) alleging that CSSU, Credit Suisse First Boston Mortgage Securities Corp. (“FBMSC”) and DLJ Mortgage Capital, Inc. (“DLJ” and, together with CSSU and FBMSC, the “Settling Entities”) violated the New Jersey Uniform Securities Law in connection with the offer, sale, or purchase of residential mortgage-backed securities prior to the global financial crisis of 2008. On October 24, 2022, the Court entered a Consent Order and Final Judgment (“Consent Judgment”) negotiated and submitted by the parties. The Consent Judgment also states that “Credit Suisse shall not violate the [New Jersey] Securities Law” or the Consent Judgment or a related administrative consent order. The Credit Suisse Investment Advisers were not involved in the conduct underlying the Consent Judgment.

Section 9(a) of the 1940 Act automatically prohibits entities that are, or whose affiliates are, subject to, among other things, certain court ordered “injunctions,” from serving or acting as investment adviser of any investment company registered under the 1940 Act or a principal underwriter for any registered open-end investment company under the 1940 Act, or serving in various other capacities in respect of registered investment companies. Credit Suisse and Credit Suisse UK provide investment advisory services to Funds, and CSSU serves as principal underwriter to the Open-End Funds. Because Credit Suisse and Credit Suisse UK are affiliates of the Settling Entities, they could also be subject to disqualification under Section 9(a), despite not being involved in the conduct underlying the Consent Judgment. Upon learning of the terms of the Consent Judgment and the potential consequences thereof under Section 9(a), Credit Suisse promptly contacted the Boards and the Staff of the Commission.

On June 7, 2023, the Credit Suisse Investment Advisers and the Settling Entities (collectively, the “Applicants”) submitted an application to the Commission pursuant to Section 9(c) of the 1940 Act. The Applicants applied for:

The “CS Fund Servicing Reorganization” refers to the process of (i) transitioning the Fund Servicing Activities that Credit Suisse, Credit Suisse UK and CSSU perform on behalf of one or more of the Funds to other providers of such services, and/or (ii) restructuring the Applicants’ businesses such that Credit Suisse, Credit Suisse UK and/or each other company that was an “affiliated person” of the Settling Entities as of the date of the Section 9(c) application may provide Fund Servicing Activities without being subject to disqualification under Section 9(a) of the 1940 Act.

On June 7, 2023 (prior to the Closing Date), the Commission granted the Temporary Order. On July 5, 2023, the Commission granted the Permanent Order.

The Credit Suisse Investment Advisers and CSSU will be disqualified from engaging in Fund Servicing Activities for the Funds upon the expiration of the Time-Limited Exemption (i.e., on the 12-month anniversary of the Closing Date on June 12, 2024), unless the Applicants’ businesses are restructured such that the Credit Suisse Investment Advisers are no longer affiliated persons of the Settling Entities (which is not expected to occur). As noted above, the Fund Servicing Activities provided by the Credit Suisse Investment Advisers and CSSU will be transitioned to one or more UBS Investment Advisers and one or more UBS distributors, respectively, on or prior to the expiration of the Time-Limited Exemption.

Comparison of the Prior Advisory Agreements and the New Advisory Agreements

The terms of each New Advisory Agreement are identical to the terms of the corresponding Prior Advisory Agreement, except for the dates of execution, effectiveness and termination and certain non-material changes. Each Prior Advisory Agreement had, and the corresponding New Advisory Agreement has, an initial period of two years and thereafter shall continue automatically for successive annual periods, provided such continuance is specifically approved at least annually by (a) the Board of the applicable Fund or (b) a vote of a “majority” (as defined in the 1940 Act) of the Fund’s outstanding voting securities, provided that in either event the continuance is also approved by a majority of the Independent Board Members, by vote cast in person at a meeting called for the purpose of voting on such approval.

Appendix G sets out the advisory fee rate payable by each Fund under its Prior Investment Advisory Agreement and its New Investment Advisory Agreement and the sub-advisory fee rate payable by Credit Suisse to Credit Suisse UK with respect to the Strategic Income Fund under the Prior Sub-Advisory Agreement and the New Sub-Advisory Agreement. Under each Fund’s New Investment Advisory Agreement, the advisory fee rates payable by the Fund will be the same as those under the Fund’s Prior Investment Advisory Agreement, and under the New Sub-Advisory Agreement, the sub-advisory fees payable by Credit Suisse to Credit Suisse UK will be the same as those under the Prior Sub-Advisory Agreement.

Each Prior Advisory Agreement and the corresponding New Advisory Agreement may be terminated with respect to a Fund at any time without the payment of any penalty, on 60 days’ written notice to Credit Suisse by the Board or by a vote of the majority of the respective Fund’s outstanding voting securities. Each Prior Advisory Agreement and the corresponding New Advisory Agreement may be terminated by Credit Suisse on 90 days’ written notice to the respective Fund. Each Prior Advisory Agreement and the corresponding New Advisory Agreement will also terminate automatically in the event of its “assignment” (as defined in the 1940 Act).

Board Review and Approval of the New Advisory Agreements

As noted above, each Board, including a majority of the Independent Board Members of each Board, unanimously approved the New Advisory Agreement(s) at the May 2023 Board Meeting after concluding that the approval of the New Advisory Agreement(s) was in the best interests of the respective Fund(s) and its shareholders. The factors considered by each Board in considering and approving the New Advisory Agreement are set out below.

In anticipation of the closing of the Merger, and in response to a request from the Board, representatives of UBS attended the May 2023 Board Meeting and provided information regarding the UBS asset management business and the investment advisory and principal underwriting services currently provided to the UBS family of registered investment companies (the “UBS Presentation”).

Each Board’s evaluation of the New Advisory Agreements reflected information provided at the May 2023 Board Meeting as well as, where relevant, information relating to each Fund, Credit Suisse and Credit Suisse UK, that was previously furnished to the Board in connection with a special meeting held on November 9, 2022, where the Boards discussed the information and materials relating to the renewal of the Prior Advisory Agreements, and at an in person meeting held on November 14-15, 2022 (“November 2022 15(c) Meeting”), where each Board approved the renewal of the respective Prior Advisory Agreement(s) (collectively, the “November 2022 15(c) Materials”), and information provided to the Boards at other Board meetings throughout the year. The Boards considered Credit Suisse’s representations at the May 2023 Board Meeting that (i) no material changes to the information provided in the November 2022 15(c) Materials had occurred since the November 2022 15(c) Meeting and (ii) the personnel, resources and services provided to the Funds are not expected to change under the New Advisory Agreements and will be similar to those services provided under the Prior Advisory Agreements.

Each Board, including all of the Independent Board Members, were assisted by experienced independent legal counsel throughout the New Advisory Agreement review process. The Independent Board Members discussed the proposed approvals in private session with such counsel at which no representatives of management, Credit Suisse or Credit Suisse UK were present. Each Board Member, including each of the Independent Board Members, relied upon the advice of independent legal counsel and his or her own business judgment in determining the material factors to be considered in evaluating the New Advisory Agreements and the weight to be given to each such factor. The conclusions reached by the Board Members were based on a comprehensive evaluation of all of the information provided and were not the result of any one factor. Moreover, each Board Member may have afforded different weight to the various factors in reaching his or her conclusions with respect to the New Advisory Agreements.

While the application for the Section 9(c) exemption was submitted and the Temporary Order was granted after the Board approved the New Advisory Agreements at the May 2023 Board Meeting, since shortly after the entry of the Consent Judgment in October 2022, the Boards have been apprised of the Consent Judgment and the potential consequences thereof under Section 9(a) of the 1940 Act and have been provided with regular updates. In addition, the Boards were apprised of the filing of the Section 9(c) exemption application and the implications of the Time-Limited Exemption prior to approving the submission of the New Advisory Agreements to shareholders at a meeting of the Boards held on June 15, 2023.

Investment Advisory Fee Rates and Expenses

Each Board reviewed and considered the contractual advisory fees of each Fund under its Prior Advisory Agreement(s) and its New Advisory Agreement(s) set out in Appendix G (which fees are identical), in light of the extent and quality of the management services provided by Credit Suisse, as investment adviser, and, in the case of the Strategic Income Fund, by Credit Suisse UK, as sub-adviser. The Board of the Strategic Income Fund noted that the compensation paid to Credit Suisse UK does not increase the fees or expenses otherwise incurred by the Fund.

The Board of each Open-End Fund also considered that Credit Suisse and the Fund have entered into a contractual expense limitation agreement limiting the Fund’s total net expenses and that each of these arrangements were expected to continue under the New Advisory Agreements. The Boards of the Open-End Funds noted that each Open-End Fund is authorized to reimburse Credit Suisse for advisory fees previously limited and/or for expenses previously reimbursed by Credit Suisse, provided, however, that any reimbursements must be paid at a date not more than thirty-six months following the applicable month during which such fees were limited or expenses were reimbursed by Credit Suisse and the reimbursements do not cause the Fund to exceed the applicable expense limitation at the time the fees are recouped. The Board also noted that the expense limitation agreements may not be terminated before February 28, 2024.

The Board of DHY also considered that, currently, Credit Suisse voluntarily waives 0.15% of advisory fees on the first $200 million of the average weekly value of the Fund’s total assets minus the sum of liabilities (other than the aggregate indebtedness constituting leverage) (the “Managed Assets”) and 0.25% of advisory fees on the next $50 million of the Fund’s Managed Assets. In addition, the Board considered DHY’s actual advisory fee rate of 0.831% for the fiscal year ended October 31, 2022 paid by DHY after taking into account the voluntary advisory fee waiver, as well as the advisory fee breakpoint in the Fund’s Prior Investment Advisory Agreement (which breakpoint is also included in the Fund’s New Investment Advisory Agreement). The Board of DHY acknowledged that the voluntary advisory fee waiver could be discontinued at any time.

The November 2022 15(c) Materials included information comparing each Fund’s contractual advisory fee, each Fund’s contractual advisory fee less any waivers and/or reimbursements (“actual advisory fee”), and each Fund’s overall expenses with those of funds in both the relevant expense group (each, an “Expense Group”) and universe of funds (each, an “Expense Universe”) provided by Broadridge, an independent provider of investment company data. The November 15(c) Materials included a description of the methodology used to arrive at the funds included in the Expense Group and the Expense Universe. Each fund in the relevant Expense Group and Expense Universe was placed in one of five quintiles for each relevant comparison period, with the first quintile including the funds with the lowest relative expenses and the fifth quintile including funds with the highest relative expenses during the period. Each Fund’s Board noted the following with respect to the Fund’s fees and expenses compared to its peers as presented in a report provided by Broadridge:

Nature, Extent and Quality of the Services

Each Board received and considered information regarding the nature, extent and quality of services provided to its respective Fund(s) by Credit Suisse and, in the case of the Strategic Income Fund, by Credit Suisse UK. Each Board also noted information received at regular meetings throughout the year related to the services rendered by Credit Suisse which, in addition to portfolio management and investment management services, included credit analysis and research, supervising the day-to-day operations of each Fund’s non-advisory functions which include accounting, administration, custody, transfer agent and other applicable third party service providers, overseeing and facilitating audits, overseeing each applicable Fund’s credit facility and supervising and/or preparing applicable Fund filings, disclosures and shareholder reports. Each Board noted that the extensive investment management services provided by Credit Suisse included broad supervisory responsibility and oversight over other service providers to the Funds. Each Board also considered Credit Suisse’s compliance program with respect to the Funds. Each Board noted that Credit Suisse reports to the Boards about portfolio management and compliance matters on a periodic basis. Each Board also reviewed background information about Credit Suisse and, in the case of the Strategic Income Fund, Credit Suisse UK, including their respective Form ADV Part 2 – Disclosure Brochure and, with respect to Credit Suisse, Brochure Supplement and considered the background and experience of Credit Suisse’s senior management and the expertise of, and the amount of attention given to the Fund by, senior personnel of Credit Suisse. In addition, each Board reviewed the qualifications, backgrounds and responsibilities of the portfolio management team primarily responsible for the day-to-day portfolio management of the respective Fund and the extent of the resources devoted to research and analysis of actual and potential investments, as well as the resources provided to them. Each Board evaluated the ability of each of Credit Suisse and, in the case of the Strategic Income Fund, Credit Suisse UK, based on its resources, reputation and other attributes, to attract and retain qualified investment professionals including research, advisory, and supervisory personnel. Each Board also received and considered information about the nature, extent and quality of services and fee rates offered to other Credit Suisse clients for comparable services. Each Board acknowledged Credit Suisse’s representation that the services provided to the Funds are more extensive than the services provided in connection with other types of accounts, such as separate accounts, offered by Credit Suisse and the services are also more extensive from those offered and provided to a sub-advised fund. Each Board also considered that the services provided by Credit Suisse have expanded over time as a result of regulatory and other developments.

In approving the New Sub-Advisory Agreement, the Board of the Strategic Income Fund considered the benefits of retaining Credit Suisse’s affiliate as the Fund’s sub-adviser and Credit Suisse UK’s investment style.

Fund Performance

Each Board considered information provided in the November 2022 15(c) Materials and at each subsequent quarterly meeting to consider the performance of its respective Fund(s). That information in the November 2022 15(c) Materials included performance results of each Fund over the previous year ended August 31, 2022 as well as over the two-, three-, four-, five-, and ten-year periods, as applicable, ended August 31, 2022 along with comparisons both to the relevant performance group (each, a “Performance Group”) and universe of funds (each, a “Performance Universe”) for the Fund for the same time periods provided by Broadridge. The November 2022 15(c) materials included a description of the methodology used to arrive at the funds included in the Performance Group and the Performance Universe. Each fund in the relevant Performance Universe was placed in one of five quintiles for each relevant comparison period, with the first quintile including the best performing funds and the fifth quintile including the worst performing funds during the period. Each Fund’s Board noted the following with respect to the Fund’s performance compared to its peers as presented in a report provided by Broadridge, along with other information provided by Credit Suisse, as applicable:

Each Board also considered the investment performance of the respective Fund(s) relative to its stated objectives.

Each Board noted that at the May 2023 Board Meeting, the Boards received information from Credit Suisse regarding (i) with respect to the Commodity Fund and Commodity Portfolio, each Fund’s performance relative to its benchmark for the one- and three-month, year-to-date and one-, three-, five- and ten-year and since inception periods ended March 31, 2023; (ii) with respect to the Multialternative Strategy Fund and Managed Futures Fund, each Fund’s performance relative to its benchmark for each month of 2023 and each quarter from the quarter ended June 30, 2020 through the quarter ended March 31, 2023, in addition to relative to its select peers for the three-month and one-, three- and five-year and since inception periods ended March 31, 2023; and (iii) with respect to the Strategic Income Fund, Floating Rate Fund, CIK and DHY, each Fund’s performance relative to its benchmark and select peers for the three- and six-month and one-, three-, five-, and ten-year periods ended March 31, 2023, as applicable.

Credit Suisse Profitability

Each Board referred to a profitability analysis of Credit Suisse provided in the November 2022 15(c) Materials based on the fees payable under the Prior Investment Advisory Agreements and the New Investment Advisory Agreements for the Funds, including any fee waivers, as well as other relationships between the Funds on the one hand and Credit Suisse affiliates on the other. Each Board’s deliberations also reflected, in the context of Credit Suisse’s profitability, Credit Suisse’s methodology for allocating costs to the Funds, recognizing that cost allocation methodologies are inherently subjective. Each Board had also received net profitability information for all of the Funds. Each Board reviewed Credit Suisse’s profit margin as reflected in the profitability analysis, as well as reviewing profitability in light of appropriate court cases and the services rendered to the Funds.

Economies of Scale

Each Board considered information provided in the November 2022 15(c) Materials regarding whether there have been economies of scale with respect to the management of the Funds, whether the Funds have appropriately benefited from any economies of scale, and whether there is potential for realization of any further economies of scale for the Funds as follows:

Other Benefits to Credit Suisse

Each Board considered other benefits received by Credit Suisse and its affiliates as a result of their relationship with the Funds previously included in the November 2022 15(c) Materials. Such benefits included, among others, benefits potentially derived from an increase in Credit Suisse’s businesses and its reputation as a result of its relationship with the Funds (such as the ability to market its advisory services to other clients and investors including separate account or third party sub-advised mandates or other financial products offered by Credit Suisse and its affiliates), as well as, with respect to the Open-End Funds, the fees paid to an affiliate of Credit Suisse for distribution services.

Each Board considered the standards Credit Suisse applied in seeking best execution and Credit Suisse’s policies and practices regarding soft dollars and reviewed Credit Suisse’s method for allocating portfolio investment opportunities among its advisory clients, as provided in the November 2022 15(c) Materials.

Other Factors and Broader Review

As discussed above, each Board previously reviewed and referred to detailed materials received from Credit Suisse as part of this special approval process. Each Board also reviews and assesses the quality of the services that each Fund receives throughout the year and reviews reports of Credit Suisse at least quarterly, which include, among other things, detailed portfolio and market reviews, detailed fund performance reports, and Credit Suisse’s compliance procedures.

Each Board also considered the information provided by the representatives of UBS during the UBS Presentation at the May 2023 Board Meeting. In particular, each Board considered the information regarding the investment advisory and principal underwriting services currently provided to the UBS family of registered investment companies.

In addition, each Board considered representations from Credit Suisse and UBS that there were no plans to make any changes to the investment objective(s), principal investment strategies and policies, principal risks, fundamental and non-fundamental investment policies or portfolio managers (other than potential personnel changes outside of Credit Suisse’s control) of the Funds upon the closing of the Merger.

Conclusions

After consideration of the foregoing, each Board reached the following conclusions regarding the New Investment Advisory Agreements and, as applicable, the New Sub-Advisory Agreement (in addition to the conclusions set forth above):

No single factor reviewed by each Board was identified by each Board as the principal factor in determining whether to approve the New Advisory Agreements. The Independent Board Members were advised by separate independent legal counsel throughout the process. After consideration of these factors, each Fund’s Board concluded that the approval of the New Advisory Agreements was in the best interests of the Fund and the Fund’s shareholders.

ADDITIONAL INFORMATION

Proxy Voting and Shareholder Meeting

All properly executed and timely received proxy cards will be voted in accordance with the instructions marked thereon or otherwise provided therein. Accordingly, unless instructions to the contrary are marked, proxy cards will be voted for the approval of each Fund’s New Investment Advisory Agreement and, in the case of the Strategic Income Fund, approval of the New Sub-Advisory Agreement. A previously submitted proxy card can be revoked by mail (addressed to the Secretary of the applicable Fund, c/o Credit Suisse Asset Management, LLC, Eleven Madison Avenue, Floor 2B, New York, New York 10010), voting again through the toll-free number or the Internet address listed in the proxy card, or at the Meeting by executing a superseding proxy card or by submitting a notice of revocation. Merely attending the Meeting, however, will not revoke any previously submitted proxy card.

All shareholders of record of each Fund on the Record Date are entitled to vote at the Meeting. Approval of each Proposal requires the vote of a “majority of the outstanding voting securities” of the respective Fund entitled to vote on the applicable Proposal voting separately. A “majority of the outstanding voting securities” is defined in the 1940 Act as either (i) the vote of 67% or more of the voting securities entitled to vote on the applicable Proposal that are present at the Meeting, if the holders of more than 50% of the outstanding shares are present or represented by proxy, or (ii) the vote of more than 50% of the outstanding voting securities entitled to vote on the applicable Proposal, whichever is less.

A quorum for the Meeting will consist of shareholders is constituted by the presence in person or by proxy of the holders of record of: (i) in the case of Credit Suisse Opportunity Funds, Credit Suisse Trust and Credit Suisse High Yield Bond Fund, a majority of the outstanding shares of the applicable Fund’s outstanding and entitled to vote at the Meeting, and (ii) in the case of Credit Suisse Commodity Strategy Funds and Credit Suisse Asset Management Income Fund, Inc., one-third of the shares of the applicable Fund’s outstanding and entitled to vote at the Meeting. If a beneficial owner of Fund shares does not give voting instructions to its broker, the broker cannot vote those shares, and those shares would not count as present for a quorum or for the vote on the Proposals. We urge you to instruct your broker or other nominee to vote your shares.  Abstentions, if any, will have the effect of a negative vote against a Proposal. In the event that athe necessary quorum to transact business or the vote required to approve or reject the proposal described in the Joint Proxy Statement is not presentobtained at the Meeting the holders ofwith respect to a majority of the shares present in personTrust, CIK or by proxy will have the power to adjourn the Meeting, without notice other than an announcement at the Meeting, until the requisite number of shares entitled to vote at the Meeting is present. In the event that a quorum is present at the Meeting but sufficient votes to approve any of the proposals are not received,DHY, the persons named as proxies may propose one or more adjournments of the Meeting with respect to the Trust in accordance with applicable law to permit further solicitation of Proxies.proxies. Any such adjournment will require the affirmative vote of the holders of a majority of CIK’s, DHY’s and/or the Fund’sapplicable Trust’s shares represented at the Meetingpresent in person or by proxy andat the Meeting. The persons named as proxies will vote in favor of such adjournment those Proxies thatproxies which they are entitled to vote “FOR” any proposal in favor of such adjournmentthe proposal described in the Joint Proxy Statement and will vote against any such adjournment those proxies required to be voted “AGAINST” any proposal against any such adjournment. Absentproposal.

Shares of the establishmentCommodity Return Strategy Portfolio, a series of CS Trust, are sold to certain tax-qualified pension and retirement plans (“Qualified Plans”) and insurance companies (“Insurance Companies”) and their separate accounts and are used as investment options under the Qualified Plans and under variable annuity contracts and variable life insurance policies (“Variable Contracts”) issued by the Insurance Companies. Variable Contract holders and Qualified Plan participants who select the Commodity Return Strategy Portfolio for investment through a Variable Contract or Qualified Plan have a beneficial interest in the Portfolio, but do not invest directly in or hold shares of the Portfolio. An Insurance Company or Qualified Plan that uses the Commodity Return Strategy Portfolio as a funding vehicle is, in most cases, the legal shareholder of the Portfolio and, as such, has sole voting power with respect to the shares. However, under current law, the Insurance Companies are required to solicit voting instructions from Variable Contract holders who beneficially own shares of the Commodity Return Strategy Portfolio as of the Record Date and must vote all shares held in the separate account in proportion to the voting instructions received for the Meeting. The Qualified Plans will also solicit voting instructions from Qualified Plan participants who beneficially own shares of the Commodity Return Strategy Portfolio as of the Record Date. The Insurance Companies and the Qualified Plans will vote shares of the Commodity Return Strategy Portfolio for which no instructions have been received in the same proportion as they vote shares for which they have received instructions, even in instances where a broker would be prevented from exercising discretion. As a result, the vote of a subsequent record date andsmall number of shares could determine the giving of notice to the holders of record thereon, the adjourned Meeting must take place not more than 120 days after the record date. At such adjourned Meeting, any business may be transacted which might have been transacted at the original Meeting. If a quorum is present, a shareholder vote may be taken on one or moreoutcome of the proposalsvote on the proposal. Unmarked voting instructions will be voted in favor of the Proposal.

If any matter other than the Proposals properly broughtcomes before the Meeting, the shares represented by proxies will be voted on all such other proposals in the discretion of the person or persons voting the proxies. The Funds have not received notice of, and are not otherwise aware of, any other matter to be presented at the Meeting.

AST Fund Solutions, LLC (the “Agent”) has been engaged by Credit Suisse to assist with the distribution of proxy materials and the solicitation and tabulation of proxies at an aggregate cost of approximately $527,000 to $680,000, plus all reasonable out of pocket expenses incurred on behalf of each Fund. The solicitation cost will be borne by Credit Suisse out of its own legitimate profits. As the Meeting date approaches, certain shareholders may receive a telephone call from a representative of the Agent if their vote has not yet been received. Authorization to permit the Agent to execute proxies may be obtained by telephonic or electronic transmitted instructions from shareholders. Proxies that are obtained telephonically will be recorded in accordance with the procedures set forth below.

Shareholders Sharing the Same Address

As permitted by law, only one copy of this Joint Proxy Statement may be delivered to shareholders residing at the same address, unless such shareholders have notified their respective Fund of their desire to receive multiple copies of the shareholder reports and proxy statements that the Fund sends. If you would like to receive an additional copy, please call (877) 674-6273 or write to Mutual Fund Operations c/o of David Shivkumar at Credit Suisse Funds, Eleven Madison Avenue, New York, New York 10010. The Funds will then promptly deliver, upon request, a separate copy of this Joint Proxy Statement to any shareholder residing at an address to which only one copy was mailed. Shareholders wishing to receive separate copies of their respective Fund’s shareholder reports and proxy statements in the future, and shareholders sharing an address that wish to receive a single copy if they are receiving multiple copies, should also send a request as indicated.

Share and Class Information

As of the close of business on the Record Date, each of the Funds has the number of shares outstanding as set forth in Appendix A (the “Outstanding Shares”).

Ownership Information

Set forth on Appendix H are persons who, to the knowledge of each Fund, beneficially owned more than five percent of the outstanding shares of each Fund as of the Record Date.

Information relating to the amount of the equity securities owned by the Board Members and executive officers of the Funds is set forth on Appendix I.

Aggregate Fees and Brokerage Commissions

Set forth on Appendix J are the aggregate amount each Fund paid to Credit Suisse, and with respect to Strategic Income Fund, Credit Suisse paid to Credit Suisse UK, as well as the aggregate distribution services fees paid by each Open-End Fund to CSSU with respect to its Class A shares and Class C shares, as applicable, pursuant to the Plans of Distribution for each Fund’s Class A shares and Class C shares, respectively, adopted under Rule 12b-1 under the 1940 Act, during the last fiscal year of each Fund.

The Funds did not pay any commissions to affiliated broker-dealers during the fiscal years ended October 31, 2020, 2021 and 2022 or the fiscal years ended December 31, 2020, 2021 and 2022, as applicable.

Information About the Funds’ Investment Manager, Sub-Adviser, Co-Administrator/Administrator and Distributor

Each Fund’s investment manager and the Open-End Funds’ co-administrator is Credit Suisse, Eleven Madison Avenue, New York, New York 10010. Credit Suisse UK, an affiliate of Credit Suisse, acts as the Strategic Income Fund’s sub-adviser. Credit Suisse is a wholly-owned subsidiary of CSAM Americas Holding Corp., a holding company that is ultimately wholly-owned by Credit Suisse AG (“CSAG”) and located at Eleven Madison Avenue, New York, New York 10010. Credit Suisse UK is a wholly-owned subsidiary of Credit Suisse Asset Management (UK) Holding Limited, a holding company that is ultimately wholly-owned by CSAG and located at One Cabot Square, London E14 4QJ United Kingdom. Prior to the Merger, CSAG was a wholly-owned subsidiary of CS Group and was the principal operating subsidiary of CS Group. Following the Merger, CSAG is now a wholly-owned subsidiary of UBS Group, and UBS Group is the ultimate parent company of Credit Suisse and Credit Suisse UK and located at Bahnhofstrasse 45, 8001 Zurich, Switzerland.

The Open-End Funds’ co-administrator and the Closed-End Funds’ administrator is State Street Bank and Trust Company, One Lincoln Street, Boston, Massachusetts 02111. The Open-End Funds’ distributor is Credit Suisse Securities (USA) LLC, Eleven Madison Avenue, New York, New York 10010.

Information regarding the names, addresses and principal occupations of the principal executive officers and directors of Credit Suisse and Credit Suisse UK, as well as those Board members and officers of the Fund who hold positions with Credit Suisse or Credit Suisse UK, is set out in Appendix K.

Delaware Statutory Trust Act — Control Share Acquisitions of DHY

Because DHY is organized as a Delaware statutory trust, it is subject to the control share acquisition provisions (the “Control Share Statute”) contained in Subchapter III of the Delaware Statutory Trust Act (the “DSTA”). The Control Share Statute became automatically applicable to listed closed-end funds organized as Delaware statutory trusts, such as the Fund, upon its effective date of August 1, 2022.The Control Share Statute provides for a series of voting power thresholds above which shares are considered “control beneficial interests” (referred to herein as “control shares”). The first such threshold is 10% or more, but less than 15%, of all voting power. Voting power is defined by the Control Share Statute as the power to directly or indirectly exercise or direct the exercise of the voting power of Fund shares in the election of trustees. Whether a voting power threshold is met is determined by aggregating the holdings of the acquirer as well as those of its “associates,” which is broadly defined by the Control Share Statute.

Once a threshold is reached, an acquirer has no voting rights under the DSTA or the governing documents of the Fund with respect to shares acquired in excess of that threshold (i.e., the “control shares”) unless approved by shareholders or exempted by DHY’s Board. Approval by shareholders requires the affirmative vote of two-thirds of all votes entitled to be cast on the matter, excluding shares held by the acquirer and its associates as well as shares held by certain insiders of DHY. The Control Share Statute provides procedures for an acquirer to request a shareholder meeting for the purpose of considering whether voting rights shall be accorded to control shares. Further approval by DHY’s shareholders would be required with respect to additional acquisitions of control shares above the next applicable threshold level. DHY’s Board is permitted, but not obligated to, exempt specific acquisitions or classes of acquisitions of control shares, either in advance or retroactively.

The Control Share Statute does not retroactively apply to acquisitions of shares that occurred prior to the August 1, 2022 effective date. However, such shares will be aggregated with any adjournment if sufficient votes have been received and it is otherwise appropriate.

Forshares acquired after August 1, 2022 for purposes of determining whether a voting power threshold is exceeded, resulting in the presencenewly acquired shares constituting control shares.

The Control Share Statute requires shareholders to disclose to DHY any control share acquisition within 10 days of such acquisition and, upon request, to provide any information that the Board reasonably believes is necessary or desirable to determine whether a quorumcontrol share acquisition has occurred.

Recent federal and state court decisions have found that control share bylaw provisions are not consistent with the 1940 Act. Although these decisions relate to closed-end funds that adopted a control share provision in their bylaws, as opposed to a closed-end fund becoming automatically subject to a state’s control share statute (as is the case for transacting business atDHY), it is possible that a court could decide that the Meeting, abstentions and broker “non-votes” (thataforementioned precedent applies to DHY’s being subject to the Control Share Statute.

The foregoing is proxies from brokers or nominees indicating that such persons have not received instructions fromonly a summary of certain aspects of the beneficial owner or other persons entitledControl Share Statute. Shareholders should consult their own legal counsel to vote shares on a particular matterdetermine the application of the Control Share Statute with respect to which the brokers or nominees do not have discretionary power) will be treated astheir shares that are present but which have not been voted. Accordingly, shareholders are urged to forward their voting instructions promptly.

The election of a Director will require that the candidate receive a plurality of the votes cast at the Meeting in person or by proxy. Because abstentionsFund and broker non-votes are not treated as shares voted, any abstentions and broker non-votes would have no impact on the election.

2Submission of Proposals for Next Meeting of Shareholders

Credit Suisse and its affiliates have advisedEach Open-End Fund generally does not hold annual shareholder meetings. Any shareholder who wishes to submit a proposal to be considered at a Trust’s next meeting of shareholders should send the Fund that they intendproposal to vote the shares over which they have voting power atTrust so as to be received within a reasonable time before the Meeting, including shares that are held directly or on behalfBoard of employees,Trustees makes the solicitation relating to such meeting, in order to be included in the manner instructed byTrust’s proxy statement and form of proxy card relating to such meeting.

With respect to CIK, the customers or employeesnext annual shareholder meeting will take place in 2024. As noted in its proxy statement dated March 17, 2023, fund shareholders have until November 18, 2023 to submit a shareholder proposal to be considered for which such shares are held.

The Fund has one class of shares of capital stock, par value $0.001 per share (the “Shares”). On the record date, March 9, 2018, there were 52,304,929 Shares outstanding. Each Share is entitled to one vote at the Meeting, and fractional Shares are entitled to a proportionate share of one vote. In accordance with the rules of the Securities and Exchange Commission (“SEC”), the Fund is advising its shareholders of the availability on the Internet of theinclusion in CIK’s proxy materials relating to its 2024 annual meeting of shareholders. Please refer to the Meeting. These rules allow companiesproxy statement dated March 17, 2023 to provide accessdetermine if you are eligible to submit a shareholder proposal and for instructions to submit the proposal.

With respect to DHY, the next annual shareholder meeting will take place in 2024. As noted in its proxy statement dated December 27, 2022, fund shareholders have until August 29, 2023 to submit a shareholder proposal to be considered for inclusion in DHY’s proxy materials in onerelating to its 2024 annual meeting of two ways. Because the Fund has electedshareholders. Please refer to utilize the “full set delivery” option, the Fund is delivering to all shareholders paper copies of all of the proxy materials, as well as providing accessstatement dated December 27, 2022 to those proxy materials ondetermine if you are eligible to submit a publicly accessible website.shareholder proposal and for instructions to submit the proposal.

In order that your Shares may

Other Matters

Management does not know of any matters properly to be representedpresented at the Meeting you are requested to:

—indicate your instructions onother than those mentioned in this Joint Proxy Statement. If any other matters properly come before the Proxy;

—date and signMeeting, the Proxy;

—mail the Proxy promptlyshares represented by proxies will be voted with respect thereto in the enclosed envelope; and

—allow sufficient time for the Proxy to be received and processed on or before 2:00 p.m. Eastern Time on April 24, 2018.

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Shareholdersdiscretion of the Fundperson or persons voting the proxies.

Reports to Be Held on Tuesday, April 24, 2018.Shareholders The Notice of Annual Meeting of Shareholders, Proxy Statement and the Fund’s most recent annual report are available on the Internet at www.credit-suisse.com/us. The

Each Fund will furnish without charge,each person to whom this Joint Proxy Statement is delivered with a copy of the Fund’sits latest annual report for its fiscal year ended December 31, 2017and semi-annual report to any Fund shareholdershareholders upon request.request and without charge. To request a copy, please writecall (877) 674-6273.

By Order of each Board,

Karen Regan

Secretary of the Funds
July 18, 2023
New York, New York

APPENDIX A

Outstanding Voting Shares

APPENDIX B

Shareholder Approval of the Prior Advisory Agreements

APPENDIX C

New Investment Advisory Agreement for the Open-End Funds

INVESTMENT MANAGEMENT AGREEMENT

CREDIT SUISSE COMMODITY STRATEGY FUNDS
CREDIT SUISSE OPPORTUNITY FUNDS
CREDIT SUISSE TRUST

[  ], 2023

Credit Suisse Asset Management, LLC

Eleven Madison Avenue

New York, New York 10010

Dear Sirs:

Credit Suisse Commodity Strategy Funds and Credit Suisse Opportunity Funds, each a Delaware statutory trust, and Credit Suisse Trust, a business trust organized and existing under the laws of the Commonwealth of Massachusetts (each, a “Trust” and collectively, the “Trusts”), for and on behalf of their respective series listed on Annex I hereto, which may be amended from time to time (each, a “Fund” and, collectively, the Fund c/o“Funds”), each herewith confirms its agreement with Credit Suisse Asset Management, LLC One Madison Avenue, 10th Floor, New York, NY 10010,(the “Manager”), a Delaware limited liability company, as follows:

Each Trust, on behalf of its respective Funds, desires to employ the capital of such Funds by investing and reinvesting in investments of the kind and in accordance with the limitations specified in its respective Agreement and Declaration of Trust, as may be amended from time to time, and in the Funds’ Prospectus(es) and Statement(s) of Additional Information, as from time to time in effect (the “Prospectus” and “SAI,” respectively), and in such manner and to such extent as may from time to time be approved by the Board of Trustees of the Trust (the “Board”). Copies of the Funds’ Prospectuses and SAIs have been or call Telephone: 1-800-293-1232. Youwill be submitted to the Manager. Each Trust desires to employ and hereby appoints the Manager to act as investment manager to each of the applicable Funds. The Manager accepts the appointment and agrees to furnish the services for the compensation set forth below.

Subject to the supervision and direction of the Board of each Trust, the Manager will:

In providing those services, the Manager will provide investment research and supervision of each Fund’s investments and conduct a continual program of investment, evaluation and, if appropriate, sale and reinvestment of such Fund’s assets.

Subject to the approval of the Board of each Trust and where required, a Fund’s shareholders, the Manager may also callengage an investment sub-adviser or sub-advisers to provide advisory services in respect of such Fund and may delegate to such investment sub-adviser(s) the responsibilities described in paragraphs (b) through (j) above. In the event that an investment sub-adviser’s engagement has been terminated, the Manager shall be responsible for information on how to obtain directionsfurnishing such Fund with the services required to be ableperformed by such investment sub-adviser(s) under the applicable investment sub-advisory agreements or arranging for a successor investment sub-adviser(s) to attendprovide such services on terms and conditions acceptable to such Fund and the MeetingTrust’s Board and votesubject to the requirements of the 1940 Act.

In executing transactions for each Fund, selecting brokers or dealers and negotiating any brokerage commission rates, the Manager will use its best efforts to seek the best overall terms available. In assessing the best overall terms available for any portfolio transaction, the Manager will consider all factors it deems relevant including, but not limited to, breadth of the market in person.the security, the price of the security, the financial condition and execution capability of the broker or dealer and the reasonableness of any commission for the specific transaction and for transactions executed through the broker or dealer in the aggregate. In selecting brokers or dealers to execute a particular transaction and in evaluating the best overall terms available, the Manager may consider the brokerage and research services (as those terms are defined in Section 28(e) of the Securities Exchange Act of 1934, as the same may from time to time be amended) provided to each Fund and/or other accounts over which the Manager or an affiliate exercises investment discretion.

PROPOSAL 1: ELECTION OF DIRECTORS

The Manager will keep each Fund informed of developments materially affecting such Fund, and will, on its own initiative, furnish such Fund from time to time with whatever information the Manager believes is appropriate for this purpose.

The parties hereto acknowledge and agree that the Manager may receive from the Funds or the Funds’ distributor “personal information,” in the context of providing services pursuant to the Agreement (“Personal Information”), as such term is defined under applicable data privacy laws or regulations (“Applicable Data Privacy Law”). The Funds acknowledge that, to the extent they have obtained Personal Information, they have obtained all such Personal Information in accordance with Applicable Data Privacy Law, and the transfer of such Personal Data to the Manager, for the intended purposes, is permissible under Applicable Data Privacy Law. The Manager agrees to only proposaluse such Personal Information for the purpose of performing the services for the Funds hereunder. The parties agree to be submitted atnegotiate in good faith any separate agreements required to enable the Meetingparties to comply with Applicable Data Privacy Law where necessary. Each party agrees that it will benot “sell” (as such term is defined under Applicable Data Privacy Law) any Personal Information. The parties shall undertake administrative, technical, physical and organizational measures designed to protect against unauthorized, accidental or unlawful processing, loss, theft, interception, destruction, access, use, disclosure or similar risks to the election of five (5) DirectorsPersonal Information. The parties shall ensure that any Personal Information provided to any subsidiary of the Fund to hold office forrespective parties shall comply with the terms set forth belowherein and untilunderstand that each respective party shall be responsible for any breach by any subsidiary of such respective party.

The Manager shall exercise its best judgment in rendering the services listed in Sections 2, 3 and 4 above. The Manager shall not be liable for any error of judgment or mistake of law or for any loss suffered by any Fund in connection with the matters to which this agreement (“Agreement”) relates, provided that nothing herein shall be deemed to protect or purport to protect the Manager against any liability to each Fund or to shareholders of such Fund to which the Manager would otherwise be subject by reason of willful misfeasance, bad faith or gross negligence on its part in the performance of its duties or by reason of the Manager’s reckless disregard of its obligations and duties under this Agreement.

In consideration of the management services rendered pursuant to Section 2 of this Agreement, each Fund will pay the Manager the annual fee applicable to such Fund calculated at an annual rate set forth on Annex I hereto of such Fund’s average daily net assets. The fee shall be calculated and payable monthly.

The fee for the period from the date of this Agreement to the end of the year shall be prorated according to the proportion that such period bears to the full yearly period. Upon any termination of this Agreement before the end of a year, the fee for such part of that year shall be prorated according to the proportion that such period bears to the full yearly period and shall be payable upon the date of termination of this Agreement. For the purpose of determining fees payable to the Manager, the value of each Fund’s net assets shall be computed at the times and in the manner specified in such Fund’s Prospectus or SAI.

The Manager will bear all expenses in connection with the performance of its services under this Agreement, including the fees payable to any investment sub-adviser engaged pursuant to Section 2 of this Agreement; provided, however, that each Fund will reimburse the Manager for the reasonable out-of-pocket expenses incurred by it on behalf of the Fund with respect to services rendered pursuant to paragraphs (l) through (ee) of Section 2 upon presentation of appropriate documentation. Such reimbursable expenses shall include, but not be limited to, postage, telephone, facsimile, photocopying and commercial courier charges. Each Fund will bear its proportionate share of certain other expenses to be incurred in its operation, including: investment advisory and administration fees; taxes, interest, brokerage fees and commissions, if any; fees of Trustees of the applicable Trust who are not officers, directors, or employees of the Manager, any sub-adviser or any of their respective successors are duly electedaffiliates; fees of any pricing service employed to value shares of the Fund; SEC fees and qualified. Directorsstate blue sky qualification fees; charges of custodians and transfer and dividend disbursing agents; such Fund’s proportionate share of insurance premiums; outside auditing and legal expenses; costs of maintenance of such Fund’s existence; except as otherwise provided herein, costs attributable to investor services, including, without limitation, telephone and personnel expenses; costs of preparing and printing Prospectuses and SAIs for regulatory purposes and for distribution to existing shareholders; costs of shareholders’ reports and meetings of the shareholders of such Fund and of the officers or Board of the applicable Trust; and any extraordinary expenses.

Each Fund will be responsible for nonrecurring expenses which may arise, including costs of litigation to which such Fund is a party and of indemnifying officers and Trustees of the applicable Trust with respect to such litigation and other expenses as determined by the Trustees.

Each Trust understands that the Manager now acts, will continue to act and may act in the future as investment adviser to fiduciary and other managed accounts and as investment adviser or manager to one or more other investment companies or series of investment companies, and such Trust has no objection to the Manager so acting, provided that whenever a Fund and one or more other accounts or investment companies or portfolios advised by the Manager have available funds for investment, investments suitable and appropriate for each will be allocated in accordance with a formula believed to be equitable to each entity. Each Trust recognizes that in some cases this procedure may adversely affect the size of the position obtainable for a Fund. In addition, each Trust understands that the persons employed by the Manager to assist in the performance of the Manager’s duties hereunder will not devote their full time to such service and nothing contained herein shall be deemed to limit or restrict the right of the Manager or any affiliate of the Manager to engage in and devote time and attention to other businesses or to render services of whatever kind or nature, provided that doing so does not adversely affect the ability of the Manager to perform its services under this Agreement.

With respect to each Fund, this Agreement shall continue for an initial period of two years commencing on the date first written above, and thereafter shall continue automatically for successive annual periods, provided such continuance is specifically approved at least annually by (a) the Board of the applicable Trust or (b) a vote of a “majority” (as defined in the 1940 Act) of the Fund’s outstanding voting securities, provided that in either event the continuance is also approved by a majority of the Board of the applicable Trust, who are not “interested persons” (as that term is defined in Section 2(a)(19)the 1940 Act) of any party to this Agreement, by vote cast in person at a meeting called for the purpose of voting on such approval. This Agreement is terminable with respect to a Fund, without penalty, on 60 days’ written notice, by the Board of the applicable Trust or by vote of holders of a majority of the applicable Fund’s shares, or upon 90 days’ written notice, by the Manager. This Agreement will also terminate automatically in the event of its assignment (as defined in the 1940 Act).

Each Trust represents that copies of its Agreement and Declaration of Trust, together with all amendments thereto, are on file in such state where the applicable Trust is registered.

Each Trust recognizes that directors, officers and employees of the Manager may from time to time serve as directors, trustees, officers and employees of corporations and business trusts (including other investment companies) and that such other corporations and trusts may include the name “CS” or “Credit Suisse” as part of their names, and that the Manager or its affiliates may enter into advisory or other agreements with such other corporations and trusts. If the Manager ceases to act as the investment adviser of a Fund, such Fund agrees that, at the Manager’s request, such Fund’s license to use the words “CS” or “Credit Suisse” will terminate and that such Fund will take all necessary action to change the name of such Fund to names not including the words “CS” or “Credit Suisse”.

Notice is hereby given that this Agreement is entered into on behalf of a Fund by an officer of such Fund in his capacity as an officer and not individually. It is understood and expressly stipulated that none of the Trustees or shareholders of any Fund shall be personally liable hereunder. Neither the Trustees, officers, agents nor shareholders of any Fund assume any personal liability for obligations entered into on behalf of a Fund. All persons dealing with a Fund must look solely to the property of such Fund for the enforcement of any claims against such Fund.

Please confirm that the foregoing is in accordance with your understanding by indicating your acceptance hereof at the place below indicated, whereupon it shall become a binding agreement between us.

Accepted:

CREDIT SUISSE ASSET MANAGEMENT, LLC

ANNEX I

TO INVESTMENT MANAGEMENT AGREEMENT

APPENDIX D

New Investment Advisory Agreement for CIK

CREDIT SUISSE ASSET MANAGEMENT INCOME FUND, INC.

INVESTMENT ADVISORY AGREEMENT

[  ], 2023

AGREEMENT, made as of [_], 2023 between Credit Suisse Asset Management Income Fund, Inc., a Maryland corporation (the “Fund”), and Credit Suisse Asset Management, LLC, a Delaware limited liability company (the “Adviser”).

RECITALS:

WHEREAS, the Fund is a diversified, closed-end investment company registered under the Investment Company Act of 1940, as amended (the “1940 Act”“1940 Act”);

WHEREAS, the Adviser is engaged principally in rendering management and investment advisory services and is registered as an investment adviser under the Investment Advisers Act of 1940; and

WHEREAS, the Fund desires to retain the Adviser to render management and investment advisory services to the Fund in the manner and on the terms hereinafter set forth; and

WHEREAS, the Adviser is willing to provide management and investment advisory services to the Fund on the terms and conditions hereinafter set forth.

NOW, THEREFORE, in consideration of the mutual covenants and agreements contained herein, the parties hereto agree as follows:

1.             The Fund hereby appoints the Adviser to act as investment adviser to the Fund. The Adviser accepts such appointment and agrees to render the services herein set forth, for the compensation herein provided.

2.             Subject to the supervision of the Board of Directors of the Fund (the “Board”), the Adviser will manage the portfolio of securities and investments (including cash) belonging to the Fund including the purchase, retention and disposition thereof and the execution of agreements relating thereto, in accordance with the Fund’s investment objective, policies and restrictions as stated in the Prospectus (as defined in paragraph 4(f) of this Agreement) and subject to the following understandings:

(a)             The Adviser shall furnish a continuous investment program for the Fund and in so doing shall determine from time to time what investments or securities will be purchased, retained or sold by the Fund, and what portion of the assets will be invested or held uninvested as cash, and shall oversee risks of such investments;

(b)             The Adviser shall use its best judgment in the performance of its duties under this Agreement;

(c)             The Adviser, in the performance of its duties and obligations under this Agreement, shall act in conformity with the Fund’s Articles of Incorporation, Bylaws (each as defined below), Prospectus, SAI (each as defined below), annual reports to shareholders, and with the instructions and directions of the Board and will conform to and comply with the requirements of the 1940 Act and all other applicable federal and state laws and regulations;

(d)             The Adviser shall determine the securities to be purchased or sold by the Fund and as agent for the Fund will effect portfolio transactions pursuant to its determinations either directly with the issuer or with any broker and/or dealer in such securities; in placing orders with brokers and/or dealers the Adviser intends to seek the best available price and execution for purchases and sales; the Adviser shall also determine whether or not the Fund shall enter into repurchase or reverse repurchase agreements. On occasions when the Adviser deems the purchase or sale of a security to be in the best interest of the Fund as well as other customers, the Adviser may, to the extent permitted by applicable laws and regulations, but shall not be obligated to, aggregate the securities to be sold or purchased in order to obtain the best execution and lower brokerage commissions, if any. In such event, allocation of the securities so purchased or sold, as well as the expenses incurred in the transaction, will be made by the Adviser in the manner it considers to be the most equitable and consistent with its fiduciary obligations to the Fund and, if applicable, to such other customers;

(e)             The Adviser shall maintain books and records with respect to the securities transactions of the Fund and shall render to the Board such periodic and special reports as the Board may reasonably request;

(f)             The Adviser shall provide the Fund’s Custodian as required with information relating to all transactions concerning the assets belonging to the Fund, except purchases of and any sales of the Fund’s Common Stock (“Fund Shares”);

(g)             The Adviser shall apprise the Board of important developments materially affecting the Fund;

(h)             The Adviser shall furnish to third-party data reporting services all currently available standardized performance information and other customary data;

(i)             The Adviser shall provide other information and services required in connection with the preparation and filing with regulatory authorities of all registration statements and Prospectuses, Prospectus supplements, SAIs, and annual, semi-annual and periodic reports to shareholders of the Fund;

(j)             The Adviser shall assist in supervising all aspects of the Fund’s operations, except those performed by other parties pursuant to written agreements with the Fund;

(k)             The Adviser shall act as liaison between the Fund and the Fund’s investment adviser, Credit Suisse, are referredindependent registered public accountants, counsel, custodian or custodians, transfer agent and administrator, and take all reasonable action to in this Proxy Statement as “Non-Interested Directors”.

Pursuantassure that all necessary and reasonably requested information is made available to each of them; make reports and recommendations to the Board regarding the performance of service providers; and actively participate with other relevant parties in the resolution of matters raised affecting the Fund and its operations;

(l)              The Adviser shall act as liaison with the SEC and other regulators in relation to inquiries and inspections relating to the Fund;

(m)            The Adviser shall perform certain legal duties for the Fund; retain and manage outside counsel as appropriate;

(n)             The Adviser shall provide infrastructure and support services to the Fund;

(o)             The Adviser shall perform valuation services with respect to investments held by the Fund to the extent not provided by other service providers;

(p)             The Adviser shall respond to Fund shareholder complaints and shareholder inquiries as requested by the Fund’s transfer agent; and

(q)             The Adviser shall prepare reports and provide information regarding the Fund as reasonably requested by other Fund service providers.

The investment management services of the Adviser to the Fund under this Agreement are not to be deemed exclusive, and the Adviser shall be free to render similar services to others.

3.             The Adviser is authorized to select the brokers and dealers that will execute the purchases and sales of portfolio securities for the Fund and is directed to use its best efforts to obtain the best available price and execution, except as prescribed herein. Unless and until otherwise directed by the Board, the Adviser may also effect individual securities transactions at commission rates in excess of the minimum commission rates available, if the Adviser determines in good faith that such amount of commission is reasonable in relation to the value of the brokerage or research services provided by such broker or dealer, viewed in terms of either that particular transaction or the Adviser’s overall responsibilities with respect to the Fund. The execution of such transactions shall not be deemed to represent an unlawful act or breach of any duty created by this Agreement or otherwise.

4.             The Fund has delivered copies of each of the following documents to the Adviser and will promptly notify and deliver to it all future amendments and supplements, if any:

(a)             Articles of Incorporation of the Fund, filed with the Department of Assessments and Taxation of the State of Maryland on February 11, 1987 (such Articles of Incorporation, as presently in effect and as amended from time to time, being herein called the “Articles of Incorporation”);

(b)             Bylaws of the Fund (such Bylaws, as presently in effect and as amended from time to time, being herein called the “Bylaws”);

(c)             Certified resolutions of the Board authorizing the appointment of the Adviser and approving the form of this Agreement;

(d)             Registration Statement under the Securities Act of 1933, as amended, on Form N-2, if any, as from time to time in effect (the “Registration Statement”);

(e)             Notification of Registration of the Fund under the 1940 Act on Form N-8A as filed with the Commission on February 13, 1987 and all amendments thereto; and

(f)             Prospectus and Statement of Additional Information of the Fund, if any, as from time to time in effect (the “Prospectus” and the “SAI”, respectively).

5.             The Adviser shall authorize and permit any of its partners, agents and employees who may be elected as directors or officers of the Fund to serve in the capacities in which they are elected. Services to be furnished by the Adviser under this Agreement may be furnished through the medium of any of such partners, agents or employees of the Adviser.

6.             The Adviser shall keep the Fund’s books and records required to be maintained by it pursuant to paragraph 2(e) of this Agreement. The Adviser agrees that all records which it maintains for the Fund are the property of the Fund and it will promptly surrender any of such records to the Fund upon the Fund’s request. The Adviser further agrees to preserve for the periods prescribed by Rule 31a-2 of the Commission under the 1940 Act any such records as are required to be maintained by the Adviser with respect to the Fund by Rule 31a-1 of the Commission under the 1940 Act.

7.             The parties hereto acknowledge and agree that the Adviser may receive from the Fund “personal information,” in the context of providing services pursuant to the Agreement (“Personal Information”), as such term is divided into three classes,defined under applicable data privacy laws or regulations (“Applicable Data Privacy Law”). The Fund acknowledges that, to the extent it has obtained Personal Information, it has obtained all such Personal Information in accordance with Applicable Data Privacy Law, and the transfer of such Personal Data to the Adviser, for the intended purposes, is permissible under Applicable Data Privacy Law. The Adviser agrees to only use such Personal Information for the purpose of performing the services for the Fund. The parties agree to negotiate in good faith any separate agreements required to enable the parties to comply with Applicable Data Privacy Law where necessary. Each party agrees that it will not “sell” (as such term is defined under Applicable Data Privacy Law) any Personal Information. The parties shall undertake administrative, technical, physical and organizational measures designed to protect against unauthorized, accidental or unlawful processing, loss, theft, interception, destruction, access, use, disclosure or similar risks to the Personal Information. The parties shall ensure that any Personal Information provided to any subsidiary of the respective parties shall comply with the terms set forth herein and understand that each class having a termrespective party shall be responsible for any breach by any subsidiary of three years. Each yearsuch respective party.

8.             During the term of one classthis Agreement the Adviser will expire. Lawrence J. Fox, Mahendra R. Guptapay all expenses (including without limitation the compensation of all its partners, agents and John G. Popp have each been nominatedemployees serving as directors or officers of the Fund pursuant to serve as a Class II directorparagraph 5 of this Agreement) incurred by it in connection with its activities under this Agreement other than the cost of securities and investments purchased for a three-year term to expire