2008-07-02 23:43:07 -

- Pioneer Investments today announced that it will hold a conference call regarding Pioneer High Income Trust (NYSE: PHT) and Pioneer Diversified High Income Trust (AMEX: HNW). Portfolio Manager Andrew Feltus will be on the call to discuss the recent performance of PHT and HNW. The conference call will be open to the public.

The call will be held

on July 10, 2008 at 4:00 PM EST, and can be accessed by calling 866-360-7030. Conference ID # 54078872. The call will be available on replay for seven days following the call at 800-642-1687. Conference ID # 54078872. A transcript will be posted to pioneerinvestments.com.

Pioneer Investment Management, Inc., the investment advisor for these funds, is part of Pioneer Investment Management USA Inc., the U.S. subsidiary of Pioneer Global Asset Management S.p.A. Pioneer Global and its affiliates had approximately $326 billion in assets under management as of May 31, 2008, including approximately $75 billion managed in the U.S. -0- Shareholder Inquiries: Please contact your financial advisor or visit pioneerinvestments.com Broker/Advisor Inquiries Please Contact: 800-622-9876 Media Inquiries Please Contact: Geoff Smith 617-422-4727

Closed-end funds, unlike open-end funds, are not continuously offered. There is a one-time public offering and once issued, shares of closed-end funds are sold in the open market through a stock exchange and frequently trade at prices lower than their net asset value. Net asset value (NAV) is total assets less total liabilities divided by the number of common shares outstanding.

Please consider the fund's investment objectives, risks, charges and expenses carefully before investing. The prospectus contains this and other information about the fund and should be read carefully before you invest or send money. To obtain a prospectus and for other information on Pioneer funds, contact your advisor or visit our web site: pioneerinvestments.com. Pioneer Funds Distributor, Inc., Member SIPC (C)2008 Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 Member of the UniCredit Banking Group, Register of Banking Groups

Shareholder Inquiries:
Please contact your financial advisor or visit
pioneerinvestments.com
or
Broker/Advisor Inquiries
Please Contact: 800-622-9876
or
Pioneer Investments
Media Inquiries Please Contact:
Geoff Smith, 617-422-4727