Pioneer Investments Announces Conference Calls For Three Closed-End Funds: Pioneer Municipal High Income Trust (NYSE: MHI); Pioneer Municipal High Income Advantage Trust (NYSE: MAV); Pioneer High Income Trust (NYSE: PHT)

Pioneer Investments today announced the dates and times for conference calls regarding three Closed-End Funds. The purpose of the calls is to discuss the performance of the funds year-to-date and their current positioning. The calls are open to the public. The call schedule is as follows:

Pioneer Municipal High Income Trust (NYSE: MHI) and Pioneer Municipal High Income Advantage Trust (NYSE: MAV).

The call will be held on Tuesday, August 9, 2011 at 4:00 PM ET and can be accessed by calling (888) 584-3271. Conference ID # 86796986. The call will be available on replay for seven days following the call at (855) 859-2056. Conference ID # 86796986. A transcript will be posted to pioneerinvestments.com.

Pioneer High Income Trust (NYSE: PHT)

The call will be held on Wednesday, August 10, 2011 at 4:00 PM ET and can be accessed by calling (888) 584-3271. Conference ID # 86811214. The call will be available on replay for seven days following the call at (855) 859-2056. Conference ID # 86811214. 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.

Closed-end funds, unlike open-end funds, are not continuously offered. There is a one-time public offering and once issued, common 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.

©2011 Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109

Member of the UniCredit Banking Group, Register of Banking Groups

Copyright Business Wire 2010

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