The BlackRock MuniHoldings New Jersey Quality Fund Inc (MUJ) is a mutual fund that focuses on investing in high-quality municipal bonds issued by the state of New Jersey. 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 and potential capital appreciation through a diversified portfolio of New Jersey municipal bonds. With a focus on quality, this fund seeks to provide stability and long-term growth for investors seeking exposure to the New Jersey municipal bond market.