UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT

INVESTMENT COMPANIES

Investment Company Act file number: 811-06414

Name of Fund:   BlackRock MuniYield Fund, Inc. (MYD)

Fund Address:    100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: John M. Perlowski, Chief Executive Officer, BlackRock MuniYield Fund, Inc.,
50 Hudson Yards, New York, NY 10001

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 07/31/2023

Date of reporting period: 01/31/2023

Item 1 – Report to Stockholders

(a) The Report to Shareholders is attached herewith.

BlackRock Long-Term Municipal Advantage Trust (BTA)

BlackRock MuniAssets Fund, Inc. (MUA)

BlackRock Municipal Income Fund, Inc. (MUI)

BlackRock MuniYield Fund, Inc. (MYD)

BlackRock MuniYield Quality Fund, Inc. (MQY)

Table of Contents

Municipal Market Overview For the Reporting Period Ended January 31, 2023

Municipal Market Conditions

Municipal bonds posted negative total returns during the period alongside rising interest rates spurred by surging inflation and aggressive Fed policy tightening. The market experienced a drawdown on par with some of the worst on record as the U.S. central bank delivered 425bps of rate hikes at the fastest pace in history. However, growing expectations for a pause in policy tightening later in the period offered a reprieve. Strong credit fundamentals, bolstered by robust revenue growth and elevated fund balances, drove positive excess returns versus comparable U.S. Treasuries. Shorter-duration (i.e., less sensitive to interest rates) and higher-rated bonds outperformed.

A Closer Look at Yields

Financial Conditions of Municipal Issuers

Buoyed by successive federal aid injections, vaccine distribution, and the re-opening of the economy, states and many local governments experienced revenue growth above forecasts in 2021 and 2022. While revenue collections, particularly sales and personal income tax receipts, continue to be robust in an environment of higher inflation, growth may subside as inflation declines or the economy slows. In the meantime, prevailing higher wages, energy costs, and interest rates in the post-Covid recovery will pressure state and local government costs. However, overall credit fundamentals are expected to remain sturdy. At this point, tax receipts could come under pressure although states with significant oil and gas production would benefit should prices remain elevated or rise. While municipal utilities typically benefit from autonomous rate-setting that allows them to adjust for rising fuel costs, rising commodity prices over a prolonged period could test affordability and the political will to raise rates to balance operations. State housing authority bonds, flagship universities, and strong national and regional health systems may also be pressured but are better poised to absorb the impact of the economic shock. Critical providers (safety net hospitals, mass transit systems, airports) with limited resources may still experience fiscal strain from the economic fallout from rising inflation, but aid and the re-opening of the economy will continue to support operating results through 2023. Work-from-home policies remain headwinds for mass transit farebox revenue and commercial real estate values. BlackRock anticipates that a small subset of the market, mainly non-rated stand-alone projects, will remain susceptible to credit deterioration.

The opinions expressed are those of BlackRock as of January 31, 2023 and are subject to change at any time due to changes in market or economic conditions. The comments should not be construed as a recommendation of any individual holdings or market sectors. Investing involves risk including loss of principal. Bond values fluctuate in price so the value of your investment can go down depending on market conditions. Fixed income risks include interest-rate and credit risk. Typically, when interest rates rise, there is a corresponding decline in bond values. Credit risk refers to the possibility that the bond issuer will not be able to make principal and interest payments. There may be less information on the financial condition of municipal issuers than for public corporations. The market for municipal bonds may be less liquid than for taxable bonds. Some investors may be subject to Alternative Minimum Tax (“AMT”). Capital gains distributions, if any, are taxable.

The Bloomberg Municipal Bond Index, a broad, market value-weighted index, seeks to measure the performance of the U.S. municipal bond market. All bonds in the index are exempt from U.S. federal income taxes or subject to the AMT. Past performance is not an indication of future results. Index performance is shown for illustrative purposes only. It is not possible to invest directly in an index.

The Benefits and Risks of Leveraging

The Funds may utilize leverage to seek to enhance the distribution rate on, and net asset value (“NAV”) of, their common shares (“Common Shares”). However, there is no guarantee that these objectives can be achieved in all interest rate environments.

In general, the concept of leveraging is based on the premise that the financing cost of leverage, which is based on short-term interest rates, is normally lower than the income earned by a Fund on its longer-term portfolio investments purchased with the proceeds from leverage. To the extent that the total assets of each Fund (including the assets obtained from leverage) are invested in higher-yielding portfolio investments, each Fund’s shareholders benefit from the incremental net income. The interest earned on securities purchased with the proceeds from leverage (after paying the leverage costs) is paid to shareholders in the form of dividends, and the value of these portfolio holdings (less the leverage liability) is reflected in the per share NAV.

To illustrate these concepts, assume a Fund’s Common Shares capitalization is $100 million and it utilizes leverage for an additional $30 million, creating a total value of $130 million available for investment in longer-term income securities. If prevailing short-term interest rates are 3% and longer-term interest rates are 6%, the yield curve has a strongly positive slope. In this case, a Fund’s financing costs on the $30 million of proceeds obtained from leverage are based on the lower short-term interest rates. At the same time, the securities purchased by a Fund with the proceeds from leverage earn income based on longer-term interest rates. In this case, a Fund’s financing cost of leverage is significantly lower than the income earned on a Fund’s longer-term investments acquired from such leverage proceeds, and therefore the holders of Common Shares (“Common Shareholders”) are the beneficiaries of the incremental net income.

However, in order to benefit Common Shareholders, the return on assets purchased with leverage proceeds must exceed the ongoing costs associated with the leverage. If interest and other costs of leverage exceed a Fund’s return on assets purchased with leverage proceeds, income to shareholders is lower than if a Fund had not used leverage. In such circumstance, the investment adviser may nevertheless determine to maintain a Fund’s leverage if it deems such action to be appropriate. Furthermore, the value of the Funds’ portfolio investments generally varies inversely with the direction of long-term interest rates, although other factors can influence the value of portfolio investments. In contrast, the amount of each Fund’s obligations under its respective leverage arrangement generally does not fluctuate in relation to interest rates. As a result, changes in interest rates can influence the Funds’ NAVs positively or negatively. Changes in the future direction of interest rates are very difficult to predict accurately, and there is no assurance that a Fund’s intended leveraging strategy will be successful.

The use of leverage also generally causes greater changes in each Fund’s NAV, market price and dividend rates than comparable portfolios without leverage. In a declining market, leverage is likely to cause a greater decline in the NAV and market price of a Fund’s Common Shares than if the Fund were not leveraged. In addition, each Fund may be required to sell portfolio securities at inopportune times or at distressed values in order to comply with regulatory requirements applicable to the use of leverage or as required by the terms of leverage instruments, which may cause the Fund to incur losses. The use of leverage may limit a Fund’s ability to invest in certain types of securities or use certain types of hedging strategies. Each Fund incurs expenses in connection with the use of leverage, all of which are borne by Common Shareholders and may reduce income to the Common Shares. Moreover, to the extent the calculation of each Fund’s investment advisory fees includes assets purchased with the proceeds of leverage, the investment advisory fees payable to the Funds’ investment adviser will be higher than if the Funds did not use leverage.

To obtain leverage, each Fund has issued Variable Rate Demand Preferred Shares (“VRDP Shares” or “Preferred Shares”) and/or leveraged its assets through the use of tender option bond trusts (“TOB Trusts”) as described in the Notes to Financial Statements.

Under the Investment Company Act of 1940, as amended (the “1940 Act”), each Fund is permitted to borrow money (including through the use of TOB Trusts) or issue debt securities up to 33 1/3% of its total managed assets or equity securities (e.g., Preferred Shares) up to 50% of its total managed assets. A Fund may voluntarily elect to limit its leverage to less than the maximum amount permitted under the 1940 Act. In addition, a Fund may also be subject to certain asset coverage, leverage or portfolio composition requirements imposed by the Preferred Shares’ governing instruments or by agencies rating the Preferred Shares, which may be more stringent than those imposed by the 1940 Act.

Derivative Financial Instruments

The Funds may invest in various derivative financial instruments. These instruments are used to obtain exposure to a security, commodity, index, market, and/or other assets without owning or taking physical custody of securities, commodities and/or other referenced assets or to manage market, equity, credit, interest rate, foreign currency exchange rate, commodity and/or other risks. Derivative financial instruments may give rise to a form of economic leverage and involve risks, including the imperfect correlation between the value of a derivative financial instrument and the underlying asset, possible default of the counterparty to the transaction or illiquidity of the instrument. Pursuant to Rule 18f-4 under the 1940 Act, among other things, the Funds must either use derivative financial instruments with embedded leverage in a limited manner or comply with an outer limit on fund leverage risk based on value-at-risk. The Funds’ successful use of a derivative financial instrument depends on the investment adviser’s ability to predict pertinent market movements accurately, which cannot be assured. The use of these instruments may result in losses greater than if they had not been used, may limit the amount of appreciation a Fund can realize on an investment and/or may result in lower distributions paid to shareholders. The Funds’ investments in these instruments, if any, are discussed in detail in the Notes to Financial Statements.

Investment Objective

BlackRock Long-Term Municipal Advantage Trust’s (BTA) (the “Fund”) investment objective is to provide current income exempt from regular U.S. federal income tax. The Fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its assets in municipal obligations and derivative instruments with exposure to such municipal obligations, in each case that are expected to pay interest or income that is exempt from U.S. federal income tax (except that the interest may be subject to the U.S. federal alternative minimum tax). The Fund invests, under normal market conditions, primarily in long-term municipal bonds with a maturity of more than ten years at the time of investment and, under normal market conditions, the Fund’s municipal bond portfolio will have a dollar-weighted average maturity of greater than 10 years. The Fund may invest directly in such securities or synthetically through the use of derivatives.

No assurance can be given that the Fund’s investment objective will be achieved.

Fund Information

Market Price and Net Asset Value Per Share Summary

Performance

Returns for the period ended January 31, 2023 were as follows:

Performance results may include adjustments made for financial reporting purposes in accordance with U.S. generally accepted accounting principles.

Past performance is not an indication of future results.

The Fund is presenting the performance of one or more indices for informational purposes only. The Fund is actively managed and does not seek to track or replicate the performance of any index. The index performance shown is not intended to be indicative of the Fund’s investment strategies, portfolio components or past or future performance.

More information about the Fund’s historical performance can be found in the “Closed End Funds” section of blackrock.com.

The following discussion relates to the Fund’s absolute performance based on NAV:

Municipal bonds posted slightly positive returns during the six-month period, with the benefit of income offsetting the effect of falling prices. Bond market returns, in general, were dampened by the combination of high inflation and continued interest rate increases by the Fed. Long-term municipal issues underperformed the broader tax-exempt market due to their longer duration (interest rate sensitivity.)

Portfolio income was a large contributor to the Trust’s total return at a time of negative price performance. The Trust’s use of U.S. Treasury futures to manage interest rate risk added value in the rising-rate environment. (Prices and yields move in opposite directions.) Positions in short duration bonds, including pre-refunded issues, contributed to results. Holdings in intermediate-maturity debt also outperformed as demand in that part of the yield curve helped support prices.

On the other hand, positions in longer-dated securities (those with maturities of 25 years and above) hurt performance due to their longer duration. Holdings in bonds with coupons below 5%, which were also hurt by their longer duration, further weighed on results. The Trust’s use of leverage, which magnified the impact of falling prices, was an additional negative. At the sector level, allocations to education and healthcare were the most notable detractors.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.

Overview of the Fund’s Total Investments

Investment Objective

BlackRock MuniAssets Fund, Inc.’s (MUA) (the “Fund”) investment objective is to provide high current income exempt from U.S. federal income taxes by investing primarily in a portfolio of medium- to lower-grade or unrated municipal obligations, the interest on which, in the opinion of bond counsel to the issuer, is exempt from U.S. federal income taxes. The Fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its assets in municipal bonds exempt from U.S. federal income taxes (except that the interest may be subject to the federal alternative minimum tax). The Fund invests at least 65% of its assets in municipal bonds that are rated in the medium to lower rating categories by nationally recognized rating services (for example, Baa or lower by Moody’s Investors Service, Inc. (“Moody’s”) or BBB or lower by S&P Global Ratings, or securities that are unrated but are deemed by the investment adviser to be of comparable quality at the time of investment. The Fund may invest directly in such securities or synthetically through the use of derivatives.

No assurance can be given that the Fund’s investment objective will be achieved.

Fund Information

Market Price and Net Asset Value Per Share Summary

Performance

Returns for the period ended January 31, 2023 were as follows:

Performance results may include adjustments made for financial reporting purposes in accordance with U.S. generally accepted accounting principles.

Past performance is not an indication of future results.

The Fund is presenting the performance of one or more indices for informational purposes only. The Fund is actively managed and does not seek to track or replicate the performance of any index. The index performance shown is not intended to be indicative of the Fund’s investment strategies, portfolio components or past or future performance.

More information about the Fund’s historical performance can be found in the “Closed End Funds” section of blackrock.com.

The following discussion relates to the Fund’s absolute performance based on NAV:

Municipal bonds posted slightly positive returns during the six-month period, with the benefit of income offsetting the effect of falling prices. Bond market returns, in general, were dampened by the combination of high inflation and continued interest rate increases by the Fed.

The Fund’s use of U.S. Treasury futures to manage interest rate risk added value in the rising-rate environment. (Prices and yields move in opposite directions.) The Fund’s cash position, while limited, also helped results. Cash now offers some income benefit with the Fed having moved short-term interest rates significantly higher. Holdings in tobacco and pre-refunded bonds generated modest gains in the period, further helping Fund performance.

Higher-quality, short-duration bonds generally performed the best during the period. (Duration is a measure of interest rate sensitivity). On the other hand, holdings in the utilities and education sectors detracted, as did positions in non-rated bonds and those with maturities of 25 years and above. Lower-coupon bonds (those with coupons below 5%) also detracted, largely as a result of their underperformance in the first half of the period.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.

Overview of the Fund’s Total Investments

Investment Objective

BlackRock Municipal Income Fund, Inc.’s (MUI) (the “Fund”) investment objective is to provide common shareholders with high current income exempt from U.S. federal income taxes. The Fund seeks to achieve its investment objective by investing at least 80% of its assets in municipal bonds exempt from U.S. federal income taxes (except that the interest may be subject to the U.S. federal alternative minimum tax). Under normal market conditions, the Fund invests at least 75% of its assets in municipal bonds rated investment grade or, if unrated, are deemed to be of comparable quality by the investment adviser, at the time of investment. The Fund may invest directly in such securities or synthetically through the use of derivatives.

No assurance can be given that the Fund’s investment objective will be achieved.

Fund Information

Market Price and Net Asset Value Per Share Summary

Performance

Returns for the period ended January 31, 2023 were as follows:

Performance results may include adjustments made for financial reporting purposes in accordance with U.S. generally accepted accounting principles.

Past performance is not an indication of future results.

The Fund is presenting the performance of one or more indices for informational purposes only. The Fund is actively managed and does not seek to track or replicate the performance of any index. The index performance shown is not intended to be indicative of the Fund’s investment strategies, portfolio components or past or future performance.

More information about the Fund’s historical performance can be found in the “Closed End Funds” section of blackrock.com.

The following discussion relates to the Fund’s absolute performance based on NAV:

Municipal bonds posted slightly positive returns during the six-month period, with the benefit of income offsetting the effect of falling prices. Bond market returns, in general, were dampened by the combination of high inflation and continued interest rate increases by the Fed.

Portfolio income was a large contributor to the Fund’s total return at a time of negative price performance. The Fund’s use of U.S. Treasury futures to manage interest rate risk added value in the rising-rate environment. (Prices and yields move in opposite directions.) Positions in short duration bonds, including pre-refunded issues, contributed to performance. (Duration is a measure of interest rate sensitivity.) Holdings in intermediate-maturity debt also outperformed as demand in that part of the yield curve helped support prices.

On the other hand, positions in longer-dated securities (those with maturities of 25 years and above) hurt performance due to their longer duration. Holdings in bonds with coupons below 5%, which were also hurt by their longer duration, further weighed on results. The Fund’s use of leverage, which magnified the impact of falling prices, was an additional negative.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.

Overview of the Fund’s Total Investments

Investment Objective

BlackRock MuniYield Fund, Inc.’s (MYD) (the “Fund”) investment objective is to provide shareholders with as high a level of current income exempt from U.S. federal income taxes as is consistent with its investment policies and prudent investment management. The Fund seeks to achieve its investment objective by investing at least 80% of its assets in municipal bonds exempt from U.S. federal income taxes (except that the interest may be subject to the U.S. federal alternative minimum tax). The Fund invests, under normal market conditions, at least 75% of its assets in municipal bonds rated investment grade, or deemed to be of comparable quality by the investment adviser, at the time of investment and invests primarily in long-term municipal bonds with a maturity of more than ten years at the time of investment. The Fund may invest directly in such securities or synthetically through the use of derivatives.

No assurance can be given that the Fund’s investment objective will be achieved.

Fund Information

Market Price and Net Asset Value Per Share Summary

Performance

Returns for the period ended January 31, 2023 were as follows:

Performance results may include adjustments made for financial reporting purposes in accordance with U.S. generally accepted accounting principles.

Past performance is not an indication of future results.

The Fund is presenting the performance of one or more indices for informational purposes only. The Fund is actively managed and does not seek to track or replicate the performance of any index. The index performance shown is not intended to be indicative of the Fund’s investment strategies, portfolio components or past or future performance.

More information about the Fund’s historical performance can be found in the “Closed End Funds” section of blackrock.com.

The following discussion relates to the Fund’s absolute performance based on NAV:

Municipal bonds posted slightly positive returns during the six-month period, with the benefit of income offsetting the effect of falling prices. Bond market returns, in general, were dampened by the combination of high inflation and continued interest rate increases by the Fed.

The Fund’s use of U.S. Treasury futures to manage interest rate risk added value in the rising-rate environment. (Prices and yields move in opposite directions.) Holdings in higher-quality issues, especially in the state general obligation sector, also helped results. Bonds with short calls and high coupons contributed modestly, as well. (A bond is called when an issuer redeems it prior to its maturity date.)

Positions in issues with maturities of 25 years and above detracted due to their longer duration. (Duration is a measure of interest rate sensitivity). Within this category, bonds with low coupons—especially in the housing sector—detracted the most despite their generally higher quality. Holdings in the longer-duration utilities, local tax-backed, healthcare and transportation sectors also detracted.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.

Overview of the Fund’s Total Investments

Investment Objective

BlackRock MuniYield Quality Fund, Inc.’s (MQY) (the “Fund”) investment objective is to provide shareholders with as high a level of current income exempt from U.S. federal income taxes as is consistent with its investment policies and prudent investment management. The Fund seeks to achieve its investment objective by investing at least 80% of its assets in municipal bonds exempt from U.S federal income taxes (except that the interest may be subject to the U.S. federal alternative minimum tax). The Fund invests in municipal bonds which are in the three highest quality rating categories (A or better), or which are deemed to be of comparable quality by the adviser, at the time of investment. The Fund invests primarily in long-term municipal bonds with maturities of more than ten years at the time of investment. The Fund may invest directly in such securities or synthetically through the use of derivatives.

No assurance can be given that the Fund’s investment objective will be achieved.

Fund Information

Market Price and Net Asset Value Per Share Summary

Performance

Returns for the period ended January 31, 2023 were as follows:

Performance results may include adjustments made for financial reporting purposes in accordance with U.S. generally accepted accounting principles.

Past performance is not an indication of future results.

The Fund is presenting the performance of one or more indices for informational purposes only. The Fund is actively managed and does not seek to track or replicate the performance of any index. The index performance shown is not intended to be indicative of the Fund’s investment strategies, portfolio components or past or future performance.

More information about the Fund’s historical performance can be found in the “Closed End Funds” section of blackrock.com.

The following discussion relates to the Fund’s absolute performance based on NAV:

Municipal bonds posted slightly positive returns during the six-month period, with the benefit of income offsetting the effect of falling prices. Bond market returns, in general, were dampened by the combination of high inflation and continued interest rate increases by the Fed.

Portfolio income was a large contributor to the Fund’s total return at a time of negative price performance. Positions in the 10-year part of the yield curve performed well thanks to the combination of low supply and elevated demand from retail investors. At the sector level, tax-backed and utility issues delivered positive returns. The Fund’s use of U.S. Treasury futures to manage interest rate risk added value in the rising-rate environment, with all of the contribution occurring in the first half of the period. (Prices and yields move in opposite directions.)

The Fund’s holdings in lower-quality bonds detracted from performance, as did its positions in longer-dated securities. Lower-coupon bonds, while recovering in the latter half of the period, also detracted from performance. The majority of this position was held in the housing sector.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.

Overview of the Fund’s Total Investments