Municipal bonds are going down for a handful of overlapping reasons: interest rates have climbed, inflation is eating into fixed coupon payments, tax policy shifts have weakened the value of the federal exemption, some issuers have been downgraded or look financially shakier, and heavy fund redemptions have forced managers to sell into a thin market. Any one of these pushes prices lower. When several hit at once, the drop is sharper.
Rising Interest Rates Are the Biggest Driver
Bond prices and interest rates move in opposite directions. When rates climb, the fixed coupon on a bond you already own looks worse against newly issued bonds paying more, and the only way to sell is to discount the price. The Federal Reserve’s target for the federal funds rate sits at 3.50% to 3.75% as of January 2026 and anchors borrowing costs across the economy.1Federal Reserve. Economy at a Glance – Policy Rate When that anchor moves up, every outstanding bond gets repriced almost instantly, whether or not anyone actually trades it.
How far your bond falls depends on its duration, which measures sensitivity to rate changes. A rough rule: a bond’s price moves about 1% in the opposite direction of rates for each year of duration. A five-year duration bond loses roughly 5% when rates rise a full percentage point. A fifteen-year duration bond loses closer to 15%. Long-dated holdings get hit hardest.
Callable bonds compound the problem. Many munis let the issuer repay principal early, typically after 10 years, and refinance at a lower rate.2MSRB. Municipal Bond Investment Risks When rates fall, issuers call the bonds and hand you back cash you can only reinvest at the new, lower yields. When rates rise, nobody calls anything, and you absorb the full price loss. The option works in the issuer’s favor on both sides.
Inflation Is Eroding Real Returns
A fixed coupon loses purchasing power every month inflation runs. The Consumer Price Index rose 2.4% over the twelve months ending January 2026.3Bureau of Labor Statistics. Consumer Prices Up 2.4 Percent Over the Year Ended January 2026 A 3% coupon under those conditions delivers roughly 0.6% in real terms. If inflation expectations rise further, investors rotate out of fixed income and into assets that keep pace with prices, such as equities, commodities, or Treasury Inflation-Protected Securities. That selling pressure drives muni prices down until yields climb high enough to compensate new buyers for expected inflation.
Tax Policy Changes Shrink the Exemption’s Value
The main reason to own a muni is that interest on bonds issued by state and local governments is generally excluded from federal gross income.4Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds The higher your tax bracket, the more that exemption is worth. For 2026, the top 37% federal bracket applies to single filers above $640,600 and married couples filing jointly above $768,700.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 When Congress discusses cutting rates, the exemption is worth less, and prices fall as yields have to rise to attract buyers.
Corporate demand matters too. Banks and insurance companies historically held large muni portfolios because the tax exemption offset corporate liability. When the corporate rate drops, those institutions trim their allocations, adding supply to the market.
State taxes layer on top. Many states exempt interest only on bonds issued inside the state; out-of-state bonds get taxed at ordinary state rates.6MSRB. Tax Treatment A change in state tax policy, or a resident base shifting, can quietly reduce demand for a specific issuer’s bonds.
Private Activity Bonds and the AMT
Not every muni is fully tax-free. Interest on certain private activity bonds, which fund things like airports, housing, or private university facilities, counts as a preference item when calculating the Alternative Minimum Tax.7Office of the Law Revision Counsel. 26 USC 57 – Items of Tax Preference For 2026 the AMT exemption is $90,100 for single filers and $140,200 for joint filers, phasing out above $500,000 and $1,000,000.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Qualified 501(c)(3) and certain housing bonds are exempt from this treatment.8Internal Revenue Service. Publication 550 – Investment Income and Expenses AMT-affected interest gets reported on Form 6251.9Internal Revenue Service. 2025 Instructions for Form 6251 High-income buyers who get caught by AMT pay less for these bonds, and the price gap between affected private activity bonds and government-purpose bonds widens.
The De Minimis Rule Accelerates Price Declines
Once a muni trades below face value, a tax quirk can speed up the slide. The de minimis threshold is one-quarter of one percent of face value for each full year to maturity.10Office of the Law Revision Counsel. 26 USC 1278 – Definitions and Special Rules Stay inside that line and the gain at maturity is a capital gain. Cross it and the entire gain is taxed as ordinary income.
A $10,000 bond with 10 years to maturity has a $250 threshold. Buy it at $9,800 and you’re fine. Buy it at $9,700 and the whole $300 gain gets taxed at ordinary rates. As a bond’s price approaches that cliff, tax-sensitive buyers and mutual funds back away or sell, which pulls demand right when the bond needs it. Prices below the threshold often fall further than the raw math would suggest.
Credit Downgrades and Issuer Trouble
Rating agencies assess the likelihood that a state, city, or county will pay on time, grading from AAA down.11MSRB. Credit Rating Basics for Municipal Bond Investors A downgrade signals weaker capacity to pay, often tied to falling tax revenue, growing pension obligations, or chronic budget gaps. Buyers demand higher yield, and the price drops.
Bond type matters. General obligation bonds carry the issuer’s full taxing power, in many cases unlimited. Revenue bonds depend on a specific income stream like tolls or utility fees, and if that stream weakens, bondholders may have no claim against the issuer itself.12U.S. Securities and Exchange Commission. What Are Municipal Bonds Revenue bonds on struggling projects tend to drop more than general obligation bonds from the same region.
Outright default is rare, but perception moves prices. Chapter 9 bankruptcy exists for municipalities that qualify, and courts regularly reject filings that don’t meet the eligibility standard.13Legal Information Institute. Chapter 9 Bankruptcy Even without an actual default, rising fear can trigger selling across a whole region’s bonds.
Supply Gluts and Forced Selling From Funds
When supply overwhelms demand, prices drop regardless of what rates or credit are doing. State and local governments often cluster new issuance near fiscal year-end to lock in project funding, and a flood of new bonds forces issuers to offer higher yields to clear inventory.
Muni mutual funds and ETFs can magnify the swing. When investors pull money from these funds, managers have to sell bonds to meet redemptions whether the timing is good or not.2MSRB. Municipal Bond Investment Risks That forced selling has nothing to do with the credit of what’s being sold. During heavy outflows, prices on perfectly solid bonds can drop with everything else.
Supply-and-demand squeezes tend to be temporary. Investors who can hold through the pressure usually see prices recover once outflows stabilize. The losses that stick are the ones tied to permanent changes: a higher rate regime, a lasting credit deterioration, or a tax law shift that structurally reduces what the bond is worth to buyers.