<DOCUMENT>
<TYPE>EX-99.DD
<SEQUENCE>3
<FILENAME>dex99dd.txt
<DESCRIPTION>SUBSCRIPTION CERTIFICATES
<TEXT>

<PAGE>

                                                                      Exhibit dd

                                        SUBSCRIPTION CERTIFICATE NUMBER: _______

                                                       NUMBER OF RIGHTS: _______

                            SUBSCRIPTION CERTIFICATE

                     TCW CONVERTIBLE SECURITIES FUND, INC.

                 SUBSCRIPTION RIGHT FOR SHARES OF COMMON STOCK

          This Subscription Certificate represents the number of Rights set
forth in the upper right hand corner of this Form.  The Holder is entitled to
acquire one (1) Share of the Common Stock of the TCW Convertible securities
Fund, Inc. (the "Fund") for each four (4) Rights held.

          To subscribe for Shares of Common Stock, the Holder must present to
the Subscription Agent, prior to 5:00 p.m., New York City time, on the
Expiration Date, either (i) a notice of guaranteed delivery attached hereto,
guaranteeing delivery of (a) payment for the subscription Shares (under both
Primary Subscription and the Over-Subscription Privilege) and (b) a properly
completed and executed copy of this Subscription Certificate; or (ii) a properly
completed and executed copy of this Subscription Certificate, together with a
money order or check drawn on a bank located in the United States of America and
payable to TCW Convertible securities Fund, Inc. for an amount equal to the
number of Shares subscribed for multiplied by $__________.  Subscribers will be
subsequently notified as to the number of Shares subscribed (under both Primary
Subscription and the Over-Subscription Privilege) and the total amount owed
based on the Subscription Price as set on the Pricing Date.  See page 11 of the
Prospectus.  Payment for any balance will be due five (5) business days after
the Confirmation Date.

          If an outstanding balance as described above is not received within
the five (5) business day period, the Fund reserves the right to (i) find other
purchasers for the subscribed-for and upaid-for Shares; (ii) apply any payment
actually received by it toward the purchase of the greatest whole number of
Shares which could be acquired by such holder upon exercise of the Primary
Subscription and/or Over-Subscription Privilege; and/or (iii) exercise any and
all other rights and/or remedies to which it may be entitled, including, without
limitation, the right to set-off against payments actually received by it with
respect to such subscribed Shares and to enforce the relevant guaranty of
payment.

REGISTERED OWNER                   TCW CONVERTIBLE SECURITIES FUND, INC.

                                   THE BANK OF NEW YORK
                                   as Subscription Agent

                                        By:
                                            ____________________________________

                                            THIS CERTIFICATE IS NON-TRANSFERABLE

     THIS RIGHTS OFFERING HAS BEEN QUALIFIED OR IS BELIEVED TO BE EXEMPT FROM
QUALIFICATION ONLY UNDER THE FEDERAL LAWS OF THE UNITED STATES AND THE LAWS OF
EACH OF THE STATES IN THE UNITED STATES.  RESIDENTS OF OTHER JURISDICTIONS MAY
NOT PURCHASE THE SHARES OF COMMON STOCK OFFERED HEREBY UNLESS THEY CERTIFY THAT
THEIR PURCHASES OF SUCH SHARES ARE EFFECTED IN ACCORDANCE WITH THE APPLICABLE
LAWS OF SUCH JURISDICTIONS.
<PAGE>

TO:  The Bank of New York
     Subscription Agent
     Tender and Exchange Department
     P.O. Box 11248
     Church Street Station
     New York, New York 10286-1248

     THIS CERTIFICATE MAY NOT BE TRANSFERRED

     THE REGISTERED OWNER OF THIS SUBSCRIPTION CERTIFICATE IS ENTITLED TO THE
     NUMBER OF RIGHTS SHOWN IN THE UPPER RIGHT HAND CORNER OF THE OTHER SIDE OF
     THIS FORM AND TO SUBSCRIBE FOR ADDITIONAL SHARES OF COMMON STOCK OF TCW
     CONVERTIBLE SECURITIES FUND, INC. UPON THE TERMS AND CONDITIONS SPECIFIED
     IN THE PROSPECTUS RELATING THERETO, WHICH ARE INCORPORATED HEREIN BY
     REFERENCE, AND IS ALSO AFFORDED THE OVER-SUBSCRIPTION PRIVILEGE DESCRIBED
     IN THE PROSPECTUS.

PLEASE FILL IN ALL APPLICABLE INFORMATION:

1.   (A)  Number of Shares Subscripted for in Primary Subscription
          (not to exceed the ratio of one (1) Share for every four
          (4) Rights held):                                               ______

     (B)  Number of Shares subscribed for under the Over-Subscription
          Privilege (not to exceed the ratio of one (1) share for every
          four (4) rights held):                                          ______

     (C)  Total of (A) and (B) above                                      ______

2.   Method of Payment: Check (A) and (B):

     (A)  Notice of Guaranteed Delivery of Payment                        ______

                                                or

     (B)  Multiply number of Shares on Line 1(C) by $_____ (and enclose
          money order or check in this amount payable to "TCW Convertible
          Securities Fund, Inc.")(1)

_____________

(1)  The Purchase Price of $_____ used herein is assumed and may be more or less
     than the actual Subscription Price. See pages _____ and _____ of the
     Prospectus.

I hereby irrevocably subscribe for the number of Shares indicated above upon the
terms and conditions specified in the Prospectus relating hereto.  Receipt of
the Prospectus is hereby acknowledged.

Signature of Subscriber:  _______________________________________

(Joint owners should each sign.  If signing as executor, administrator,
attorney, trustee, or guardian, give title as such.  If a corporation, sign in
full corporate name by authorized officer.  If a partnership, sign in the name
of authorized person)
<PAGE>

TO BE EXECUTED ONLY BY NON-UNITED STATES RESIDENTS:

          I hereby certify that the foregoing purchase of Common Stock has been
effected in accordance with the applicable laws of the jurisdiction in which I
reside.

Dated: _______________________, 2001

                                                ________________________________

                                                ________________________________
</TEXT>
</DOCUMENT>
