Nuveen Municipal High Income Opportunity Fund is a closed-end fixed income mutual fund launched by Nuveen Investments Inc. The fund is co-managed by Nuveen Fund Advisors LLC and Nuveen Asset Management, LLC. It invests in the fixed income markets of the United States. The fund primarily invests in investment grade tax-exempt municipal securities. The fund was formerly known as Nuveen Municipal High Yield Opportunity Fund. Nuveen Municipal High Income Opportunity Fund was founded in November 19, 2003 and is based in the United States.

Putnam Managed Municipal Income Trust is a close-ended fixed income mutual fund launched and managed by Putnam Investment Management LLC. It is co-managed by Putnam Investments Limited. The fund invests in the fixed income markets of the United States. It primarily invests in a diversified portfolio of tax-exempt municipal securities, including high-yield securities that are rated below investment grade. The fund benchmarks the performance of its portfolio against the Barclays Municipal Bond Index. Putnam Managed Municipal Income Trust was formed on February 24, 1989 and is domiciled in the United States.

Pioneer High Income Fund, Inc. is a closed ended fixed income mutual fund launched and managed by Pioneer Investment Management, Inc. It invests in fixed income markets of the United States. The fund primarily invests in below-investment-grade bonds, high-yield corporate bonds, and convertible securities. It seeks to invest in bonds that are rated BBB- or lower by Standard and Poor's or a similar national rating service. The fund benchmarks the performance of its portfolio against the Bank of America Merrill Lynch High Yield Master II Index. Pioneer High Income Fund, Inc. was formed on April 25, 2002 and is domiciled in the United States.

Pioneer Municipal High Income Fund, Inc. is a closed-ended fixed income mutual fund launched and managed by Pioneer Investment Management, Inc. It invests in the fixed income markets of the United States. The fund primarily invests in municipal securities. It seeks to invest in securities across the credit rating and maturity spectrum. The fund benchmarks the performance of its portfolio against the Barclays Municipal Bond Index and Barclays High Yield Municipal Bond Index. Pioneer Municipal High Income Fund, Inc. was formed on March 13, 2003 and is domiciled in the United States.

Federated Premier Municipal Income Fund is a closed-ended fixed income mutual fund launched by Federated Investors, Inc. The fund is managed by Federated Investment Management Company. It invests in fixed income markets of United States. The fund primarily invests in tax-exempt municipal bonds of GO state, GO local, special tax, hospital, transportation, pre-refunded, senior care, water and sewer, education, electric and gas, and public power sectors. It benchmarks the performance of its portfolio against S&P Municipal Bond Index. Federated Premier Municipal Income Fund was formed on December 20, 2002 and is domiciled in United States.

Pioneer Floating Rate Fund, Inc. is closed ended fixed income mutual fund launched and managed by Pioneer Investment Management, Inc. It invests in the fixed income markets of the United States. The fund primarily invests in senior secured floating-rate loans. It benchmarks the performance of its portfolio against the Barclays U.S. High Yield Loans Index. Pioneer Floating Rate Fund, Inc. was formed on October 6, 2004 and is domiciled in the United States.

MFS High Yield Municipal Trust is a close ended fixed income mutual fund launched and managed by Massachusetts Financial Services Company. The fund invests in fixed income markets of the United States. It primarily invests in tax-exempt bonds and tax-exempt notes. The fund benchmarks the performance of its portfolio against Barclays Municipal Bond Index. It was formerly known as Colonial Municipal Income Trust. MFS High Yield Municipal Trust was founded in March 19, 1987 and is domiciled in the United States.

Pioneer Diversified High Income Fund, Inc. is a closed ended fixed income mutual fund launched and managed by Pioneer Investment Management, Inc. It invests in the fixed income markets across the globe. The fund seeks to invest in higher yielding asset classes, including high yield bonds, leveraged bank loans, and event-linked bonds .It employs a combination of fundamental and quantitative analysis to create its portfolio. The fund benchmarks the performance of its portfolio against a composite benchmark comprising of 50% Bank of America Merrill Lynch Global High Yield, Emerging Markets Plus Index and 50% the Credit Suisse Leveraged Loan Index. Pioneer Diversified High Income Fund, Inc. was formed on January 30, 2007 and is domiciled in the United States.