The BlackRock MuniYield Quality Fund III Inc (MYI) is a mutual fund that focuses on investing in high-quality municipal bonds. This fund is managed by BlackRock, one of the largest investment management firms in the world. The fund aims to provide investors with tax-free income by investing in a diversified portfolio of municipal bonds issued by state and local governments. With a focus on quality, the fund seeks to minimize credit risk and provide stable returns for investors. The ticker symbol for this fund is MYI.