Pioneer Municipal High Income Advantage Fund, Inc. is a closed ended fixed income mutual fund launched and managed by Pioneer Investment Management, Inc. The fund invests in the fixed income markets of the United States. It invests primarily in municipal bonds. 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 Fund, Inc. was formed on August 6, 2003 and is domiciled in the United States.