Conference Call on Pioneer Municipal High Income Advantage Trust (NYSE: MAV) and Pioneer Municipal High Income Trust (NYSE: MHI) Scheduled For July 17

BOSTON--(BUSINESS WIRE)--Pioneer Investments today announced that it will hold a conference call regarding Pioneer Municipal High Income Advantage Trust (NYSE: MAV) and Pioneer Municipal High Income Trust (NYSE: MHI). Portfolio Manager David Eurkus will be on the call to discuss the recent performance of MAV and MHI. The conference call will be open to the public.

The call will be held on July 17, 2008 at 4:00 PM EDT, and can be accessed by calling 866-360-7030. Conference ID # 54081136. The call will be available on replay for seven days following the call at 800-642-1687. Conference ID # 54081136. 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.

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

©2008 Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109

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