MHI Pioneer Municipal High Income Fund Inc

Pioneer Investments today announced the declaration of dividends for five closed-end funds for December 2013. The closing market price, annualized market price distribution rate, NAV, and NAV distribution rate are based on data as of December 2, 2013.

In addition, Pioneer Investments is announcing special one-time distributions for Pioneer Diversified High Income Trust (HNW) and Pioneer Floating Rate Trust (PHD) related to income earned by the funds in 2013 above their normal monthly distribution, which is required to be paid in 2013.

The amount per share and timing of these distributions are below.

Regular December 2013 Distributions:

  Ex Date:         December 11, 2013 Record Date: December 13, 2013 Payable Date: December 19, 2013     Fund       Distribution    

MarketPrice

   

Market PriceDistributionRate

    NAV    

NAVDistributionRate

 

Taxable

Pioneer Diversified High Income Trust (NYSE Amex:HNW) $0.1600 $20.66 9.29% $20.24 9.49% Pioneer Floating Rate Trust (NYSE:PHD) $0.0750 $12.45 7.23% $13.07 6.89% Pioneer High Income Trust (NYSE:PHT) $0.1375 $17.05 9.68% $14.01 11.78%  

Tax-Exempt

Pioneer Municipal High Income Advantage Trust (NYSE: MAV) $0.0950 $12.95 8.80% $11.60 9.83% Pioneer Municipal High Income Trust (NYSE: MHI) $0.0950 $13.72 8.31% $12.85 8.87%        

Taxable-EquivalentDistribution Rateat Market Price

   

Taxable-EquivalentDistribution Rateat NAV

  Pioneer Municipal High Income Advantage Trust (NYSE: MAV) 12.37% 13.81% Pioneer Municipal High Income Trust (NYSE: MHI) 13.09% 13.97%

Taxable-Equivalent Distribution Rate is computed using an effective tax rate of 43.4%, which includes the maximum federal tax rate of 39.6% and the net investment income tax rate of 3.8%.

*The distribution for MAV contains approximately $0.044827 per share of taxable income. This is a one-time taxable distribution in 2013. **The distribution for MHI contains approximately $0.023772 per share of taxable income. This is a one-time taxable distribution in 2013.

Special December 2013 Taxable Distributions:

        Ex Date: December 16, 2013 Record Date: December 18, 2013 Payable Date: December 30, 2013           Pioneer Floating Rate Trust (PHD) $ 0.023 Pioneer Diversified High Income Trust (HNW) $ 0.372  

The funds are closed-end investment companies. Four of these funds trade on the New York Stock Exchange (NYSE) under the following symbols: MHI, MAV, PHT, and PHD. HNW trades on the NYSE MKT. Pioneer Investment Management, Inc. is each fund’s investment adviser.

Keep in mind, dividends are not guaranteed. 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 bought and 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. For performance data on Pioneer's closed-end funds, please call 800-225-6292 or visit our closed-end pricing page.

© 2013 Pioneer Investment Management, Inc.Member of the UniCredit Banking Group,Register of Banking Groups

Pioneer InvestmentsShareholder Inquiries:Please contact your financial advisor or visit us.pioneerinvestments.com.orBroker/Advisor Inquiries800-622-9876orMedia InquiriesGeoff Smith, 617-422-4727