The Pioneer High Income Fund, Inc. is a closed-end fixed income mutual fund, overseen by Pioneer Investment Management, Inc. Its investment strategy primarily targets the fixed income markets within the United States, concentrating on below-investment-grade securities. This typically includes high-yield corporate bonds, other lower-rated bonds (specifically those rated BBB- or below by Standard & Poor's or similar national rating services), and convertible securities. The fund's performance is benchmarked against the Bank of America Merrill Lynch High Yield Master II Index. Founded on April 25, 2002, it is domiciled in the United States.