Pioneer Municipal High Income Advantage Trust 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 invests primarily in municipal bonds. It invests in fixed income securities with credit quality of BBB+. The fund benchmarks the performance of its portfolio against the Barclays Capital High Yield Municipal Bond Index and the Barclays Capital Municipal Bond Index. It was formerly known as Pioneer Municipal Advantage Trust. Pioneer Municipal High Income Advantage Trust was formed on October 17, 2003 and is domiciled in the United States.