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.