MHI Pioneer Municipal High Income Fund Inc

Pioneer Investments today announced the declaration of dividends for five closed-end funds for December 2010. The closing market price, annualized market price distribution rate, NAV, and NAV distribution rate are based on data as of December 2, 2010.

Ex Date:   December 9, 2010 Record Date: December 13, 2010 Payable Date: December 20, 2010 Fund   Distribution  

MarketPrice

 

 

Market PriceDistribution

Rate

  NAV  

NAVDistributionRate

 

Taxable

Pioneer High Income Trust (NYSE:PHT) $0.1375 $16.12 10.24% $13.70 12.04% Pioneer Floating Rate Trust (NYSE:PHD) $0.0725 $13.02 6.68% $12.59 6.91% Pioneer Diversified High Income Trust (NYSE Amex:HNW) (c) $0.1600 $21.29 9.02% $20.40 9.41%  

Tax-Exempt

Pioneer Municipal High Income Trust (NYSE: MHI) (a) $0.0900 $13.72 7.87% $13.68 7.89% Pioneer Municipal High Income Advantage Trust (NYSE: MAV) (b) $0.0900 $12.86 8.40% $12.43 8.69%  

Taxable-EquivalentDistribution Rateat Market Price

Taxable-EquivalentDistribution Rateat NAV

Pioneer Municipal High Income Trust (NYSE: MHI) 12.11% 12.14% Pioneer Municipal High Income Advantage Trust (NYSE: MAV) 12.92% 13.37%  

Taxable-Equivalent Distribution Rate is computed using the maximum federal tax rate.

Notes

(a) The distribution for MHI contains approx. $0.002745 per share of taxable income. This is a one-time taxable distribution in 2010.

(b) The distribution for MAV contains approx. $0.022456 per share of taxable income. This is a one-time taxable distribution in 2010.

(c) HNW currently has a level distribution policy, which is intended to provide investors with a relatively stable monthly distribution. The level distribution policy is subject to regular review by the Board of Trustees to determine whether it continues to be in the best interests of the fund and its shareholders. There can be no assurance that this policy will be maintained in the future or maintained at its current level. Investors should not necessarily draw any conclusions about the fund's investment performance from the amount of this distribution or from the terms of the fund's level distribution policy.

At this time, HNW believes that the December distribution and a portion of its fiscal year-to-date cumulative distributions may include a return of capital in addition to net investment income and long-term capital gains. A return of capital is not a distribution of income or capital gains from the fund, does not necessarily reflect the fund's investment performance, and should not be considered "yield" or "income." The final determination of tax characteristics of the fund’s distributions will occur after the end of the year, at which time it will be reported to shareholders.

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 Amex. 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.

© 2010 Pioneer Investment Management, Inc.

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