BlackRock MuniYield Quality Fund, Inc. (the Fund) is a non-diversified, closed-ended management investment company. The Fund's investment objective is to provide shareholders with a high a level of current income exempt from federal income taxes. The Fund seeks to achieve its investment objective by investing at least 80% of its assets in municipal bonds exempt from federal income taxes (except that the interest may be subject to the federal alternative minimum tax). The Fund invests in municipal bonds. The Fund invests primarily in long-term municipal bonds with maturities of more than 10 years at the time of investment. The Fund may invest directly in such securities or through the use of derivatives. The Company's sectors include transportation, utilities, health, education, housing and corporate. The Fund's investment advisor is BlackRock Advisors, LLC. The Fund's sub-advisor is BlackRock Investment Management LLC.