Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust : GBAB November 2022 Semi-Annual Report

11.30.2022 (Unaudited)

Guggenheim Funds Semiannual Report

Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust

GuggenheimInvestments.com

CEF-GBAB-SAR-1122

GUGGENHEIMINVESTMENTS.COM/GBAB

... YOUR LINK TO THE LATEST, MOST UP-TO-DATE INFORMATION ABOUT THE GUGGENHEIM TAXABLE MUNICIPAL BOND & INVESTMENT GRADE DEBT TRUST

The shareholder report you are reading right now is just the beginning of the story. Online at guggenheiminvestments.com/gbab, you will find:

• Daily, weekly and monthly data on share prices, net asset values, distributions and more
• Monthly portfolio overviews and performance analyses
• Announcements, press releases and special notices
• Trust and adviser contact information

Guggenheim Partners Investment Management, LLC and Guggenheim Funds Investment Advisors, LLC are continually updating and expanding shareholder information services on the Trust's website in an ongoing effort to provide you with the most current information about how your Trust's assets are managed and the results of our efforts. It is just one more small way we are working to keep you better informed about your investment in the Trust.

DEAR SHAREHOLDER (Unaudited)

November 30, 2022

We thank you for your investment in the Guggenheim Municipal Bond & Investment Grade Debt Trust (the "Trust"). This report covers the Trust's performance for the six-month period ended November 30, 2022 (the "Reporting Period").

In December 2022, Guggenheim Partners announced the untimely and unexpected death of Scott Minerd, one of Guggenheim's Managing Partners and its Global Chief Investment Officer. He joined Guggenheim as a Managing Partner shortly after the firm was formed. He was a frequent commentator on markets and investments, both on television and via social media. He also was one of the designers of the organization, systems and procedures that make Guggenheim Investments a strong, robust and scalable leader in the asset management business.

Guggenheim has implemented its succession plan, which is designed to deal with unexpected events. There will be no disruption of service to our clients, no change in the daily management of client portfolios and no change in the process of selecting investment assets, all of which are handled by longstanding committees and by long-tenured investment professionals who, every day, implement our investment process.

Guggenheim Investments continues to be led by its Co-Presidents, Dina DiLorenzo and David Rone, and by Anne B. Walsh, a Managing Partner and Chief Investment Officer of Guggenheim Partners Investment Management. She will continue her current role leading the team managing client investments and will assume many of Mr. Minerd's responsibilities on an interim basis.

To learn more about the Trust's performance and investment strategy, we encourage you to read the Economic and Market Overview and the Management's Discussion of Trust Performance sections of this report, which begin on page 5. There, you will find information on Guggenheim's investment philosophy, views on the economy and market environment, and detailed information about the factors that impacted the Trust's performance.

The Trust's primary investment objective is to provide current income with a secondary objective of long- term capital appreciation.

All Trust returns cited-whether based on net asset value ("NAV") or market price-assume the reinvestment of all distributions. For the Reporting Period, the Trust provided a total return based on market price of -9.39% and a total return based on NAV of -7.11%. At the end of the Reporting Period, the Trust's market price of $16.85 per share represented a premium of 3.44% to its NAV of $16.29 per share.

Past performance is not a guarantee of future results. All NAV returns include the deduction of management fees, operating expenses, and all other Trust expenses. The market price of the Trust's shares fluctuates from time to time, and may be higher or lower than the Trust's NAV.

During the Reporting Period, the Trust paid a monthly distribution of $0.12573 per share. The most recent distribution represents an annualized distribution rate of 8.95% based on the Trust's closing market price of $16.85 per share at the end of the Reporting Period.

GBAB l GUGGENHEIM TAXABLE MUNICIPAL BOND & INVESTMENT GRADE DEBT TRUST SEMIANNUAL REPORT l 3

DEAR SHAREHOLDER (Unaudited) continued

November 30, 2022

The Trust's distribution rate is not constant and the amount of distributions, when declared by the Trust's Board of Trustees, is subject to change. There is no guarantee of any future distribution or that the current returns and distribution rate will be maintained. Please see the Distributions to Shareholders & Annualized Distribution Rate on page 23, and Note 2(g) on page 57 for more information on distributions for the period.

We encourage shareholders to consider the opportunity to reinvest their distributions from the Trust through the Dividend Reinvestment Plan ("DRIP"), which is described in detail on page 79 of this report. When shares trade at a discount to NAV, the DRIP takes advantage of the discount by reinvesting the monthly distribution in common shares of the Trust purchased in the market at a price less than NAV. Conversely, when the market price of the Trust's common shares is at a premium above NAV, the DRIP reinvests participants' distributions in newly-issued common shares at the greater of NAV per share or 95% of the market price per share. The DRIP provides a cost-effective means to accumulate additional shares and enjoy the benefits of compounding returns over time. The DRIP effectively provides an income averaging technique, which causes shareholders to accumulate a larger number of Trust shares when the share price is lower than when the price is higher.

We appreciate your investment and look forward to serving your investment needs in the future. For the most up-to-date information on your investment, please visit the Trust's website at guggenheiminvestments.com/gbab.

Sincerely,

Guggenheim Funds Investment Advisors, LLC

Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust December 31, 2022

4 l GBAB l GUGGENHEIM TAXABLE MUNICIPAL BOND & INVESTMENT GRADE DEBT TRUST SEMIANNUAL REPORT

ECONOMIC AND MARKET OVERVIEW (Unaudited)

November 30, 2022

Month-over-month price increases in the October and November 2022 Consumer Price Index ("CPI") reports finally cooled, offering some evidence that the Federal Reserve's (the "Fed") efforts to tighten policy and get inflation under control are starting to work. The headline CPI slowed from an 11% annualized three- month growth rate in June 2022 to 3.7% by November 2022. The three-month annualized change in core CPI softened from a recent peak of 7.9% to 4.2%, and trimmed measures of inflation (measures that remove the highest and lowest outliers) also declined. While these figures are still well above the Fed's 2% core inflation target, it is encouraging to see them moving in the right direction.

The inflation categories that remain high are mostly in services. The November CPI report showed that core goods prices fell by 0.5% on the month, led by a 2.9% drop in used car prices. More declines in goods prices appear likely as supply chains rapidly improve and retailers step up their efforts to clear an inventory overhang through deeper discounting. However, housing and broader services inflation measures remain well above pre-COVID levels. Housing inflation will likely take time to come down in the official statistics due to the lagging nature of lease renewals, but more timely indicators show inflation for new rentals is falling fast. The Fed has now become more concerned with core services inflation excluding housing and how a tight labor market and high wage growth could impact this category.

The December Summary of Economic Projections, which provides the Fed's median forecasts for a variety of data including the unemployment rate, inflation, and their policy rate, confirmed that the Fed is far from convinced that inflation is heading back to target and expects more tightening will be needed to achieve their inflation target. The median 2023 forecasts for U.S. real gross domestic product growth fell to 0.5%, the federal funds rate increased to 5.1%, and the unemployment rate increased to 4.6%. At the same time, the Fed's projection for the year-over-year increase in the core personal consumption expenditures price index-its preferred inflation measure-increased to 3.5% by year-end. Taken together, these projections suggest that even with a higher terminal rate, weaker growth, and a higher unemployment rate, the Fed expects to be further away from its inflation goal in 2023 than it projected in recent months.

Our research indicates that the unemployment rate could increase to 6%, higher than the Fed's median projection, as Fed efforts to slow the already weak economy may end up overshooting. This could trigger a more serious recession than the consensus expectation and likely bring about a decline in risk assets.

The opinions and forecasts expressed may not actually come to pass. This information is subject to change at any time, based on market and other conditions, and should not be construed as a recommendation of any specific security or strategy.

GBAB l GUGGENHEIM TAXABLE MUNICIPAL BOND & INVESTMENT GRADE DEBT TRUST SEMIANNUAL REPORT l 5