AVK Declares Monthly Dividend for July.

NEW YORK & LISLE, Ill. -- Advent Claymore Convertible Securities and Income Fund (NYSE: AVK) today declared its monthly dividend of $0.1718 per share.

Dividends will be paid on July 29, 2005 to shareholders of record as of July 15, 2005. The ex-dividend date will be July 13, 2005.

Also, the Fund will make available the updated portfolio composition including asset class, sector concentration, credit quality and top ten holdings on the Fund's dedicated website at www.adventclaymore.com.

Advent Capital Management, LLC serves as the Fund's Investment Adviser. Based in New York, New York, Advent is a credit-oriented firm specializing in the management of convertible, high-yield and equity securities and the implementation of covered call and hedge fund strategies. The firm manages assets for several FORTUNE 500 companies, foundations, endowments, public pension plans, insurance companies and another closed-end fund, the Advent/Claymore Enhanced Growth & Income Fund (NYSE: LCM).

Claymore Securities, Inc. is a privately-held financial services company offering unique investment solutions for financial advisors and their valued clients. Claymore entities have provided supervision, management, servicing or distribution on approximately $10.7 billion in assets through closed-end funds, unit investment trusts and separately managed accounts. Additional information on Claymore's closed-end funds is available at www.claymore.com/CEFs.aspx.

This information does not represent an offer to sell securities of the Fund and it is not soliciting an offer to buy securities of the Fund. There can be no assurance that the Fund will achieve its investment objectives. The net asset value of the Fund will fluctuate with the value of the underlying securities. It is important to note that closed-end funds trade on their market value, not net asset value, and closed-end funds often trade at a discount to their net asset value. Past performance is not indicative of future performance.

An investment in the Fund is subject to certain risks and other considerations. Such risks and considerations include, but are not limited to: Investment and Market Risk, Convertible and Synthetic Convertible Securities Risk, High-Yield Securities Risk, Foreign Securities Risks, Derivatives Risk, Interest Rate Risk, Leverage Risk, Anti-Takeover Provisions, Market Disruption Risk and Illiquidity Risk.

Investors should consider the investment objectives and policies, risk considerations, charges and expenses of the Fund carefully before they invest. For this and more information, please contact a securities representative or Claymore Securities, Inc., 2455 Corporate West Drive, Lisle, Illinois 60532, 800-345-7999. The Fund's common shares do not represent a deposit or obligation of, and are not guaranteed or endorsed by, any bank or other insured depository institution, and are not federally insured by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.