Municipal bonds are losing value right now mostly because interest rates sit well above where they were when many outstanding bonds were issued, and a bond paying yesterday’s coupon has to be discounted to compete with new issues. Rates are the loudest factor, but they are not the only one. Inflation, weakening issuer credit, expected changes in federal tax rates, a surge in new issuance, and state-level tax quirks all push prices down through different channels. Sorting out which force is hitting your bonds tells you whether the drop is a paper loss you can ride out or a warning worth acting on.
Interest Rates Are Doing Most of the Work
Bond prices move opposite to interest rates. When newly issued municipals come to market with higher coupons, older bonds with lower fixed rates can only be sold at a discount steep enough to match a buyer’s alternative return. That repricing is automatic and touches every fixed-rate bond in the secondary market.
How far your bond moves depends on its duration, a number expressed in years. A bond with a duration of seven years falls roughly 7% in price for every one-percentage-point rise in rates, and rises about the same when rates fall. Long-dated bonds carry higher duration, which is why a 20-year municipal swings much harder than a three-year bond with the same coupon.
As of late January 2026, the Federal Reserve held its target rate at 3.5% to 3.75% after a 0.75-percentage-point cut the year before.1Federal Reserve. Federal Open Market Committee Minutes, January 27-28, 2026 Even after those cuts, rates sit well above the near-zero levels of the 2010s. Bonds bought during that low-rate stretch carry below-market coupons, and their prices reflect the gap. A 2.5% coupon in a 3.5% world has to trade at a real discount to move.
Inflation Erodes Fixed Payments
Every coupon a municipal bond pays is a fixed dollar amount. If your bond pays 4% and prices are rising 5%, your real return is negative. You lose purchasing power each year the bond stays in your account, even though the check does not shrink.
When investors expect more inflation ahead, they demand higher yields to hold fixed-income paper. Since the coupon cannot change, the price falls until the yield-to-maturity reaches a level buyers accept. Long-term bonds take the worst of it, because payments 15 or 20 years out are the most exposed to future price levels.
Credit Downgrades and Issuer Stress
Every muni carries the credit risk of the government behind it. When Moody’s or S&P downgrades an issuer, prices drop because buyers require a bigger yield to accept the added risk of missed payments.
The Investment-Grade Line
The cutoff between investment grade and speculative grade sits at BBB- on the S&P scale and Baa3 on Moody’s. A downgrade that crosses that line can force selling by pension funds and insurers barred from holding speculative debt. The forced-sale wave drives prices below what the credit change alone would justify.
General Obligation Versus Revenue Bonds
General obligation bonds are backed by the issuer’s full taxing power. Revenue bonds depend on income from a specific project such as a toll road or water system, and if the project underperforms, the bondholder wears that loss directly. Municipal defaults are rare, and investment-grade munis default at a small fraction of the corporate-bond rate. But the option of restructuring under Chapter 9 of the Bankruptcy Code, which lets a municipality adjust its debts when it cannot pay, can knock prices down long before any actual default.2Office of the Law Revision Counsel. 11 U.S.C. Chapter 9 – Adjustment of Debts of a Municipality Unfunded pension liabilities and chronic budget deficits are the warning signs investors watch, and a loss of confidence in local management often shows up in prices well before a formal rating action.
Federal Tax Policy Shifts the Math
The core appeal of a municipal bond is that its interest is excluded from federal gross income.3Office of the Law Revision Counsel. 26 U.S.C. 103 – Interest on State and Local Bonds That exemption is worth more to investors in higher brackets, so anything that changes those brackets changes what a muni is worth.
When Congress lowers income tax rates, taxable bonds keep more of their yield after tax, and the muni exemption becomes less valuable. Demand softens and prices fall. When rates rise, the opposite happens.
The 2026 TCJA Sunset
The individual tax provisions of the Tax Cuts and Jobs Act were set to expire after 2025. If they lapse without congressional action, most brackets would go up; the top marginal rate would revert from 37% to 39.6%. Higher rates would make munis more valuable and support their prices. Uncertainty over whether Congress will extend, modify, or let the provisions expire creates volatility in the meantime, because markets price expected outcomes before any bill becomes law.
Private Activity Bonds and the AMT
Not every muni is fully tax-free. Interest on “specified private activity bonds,” used to finance projects like airports, housing, and industrial facilities, is a tax preference item under the Alternative Minimum Tax.4Office of the Law Revision Counsel. 26 U.S.C. 57 – Items of Tax Preference If you owe AMT, that interest is effectively taxable, which erases much of the pricing advantage. When AMT exposure spreads across the investor base, private activity bonds tend to lose ground against other muni issues.
New Supply in a Thin Market
Muni prices respond to supply and demand like anything else. When state and local governments issue heavy new debt to fund projects or refinance old obligations, the wave of new paper can outrun buyer appetite, and sellers cut prices to move bonds.
The muni market is thinner than Treasuries or corporates. Its roughly $4 trillion in outstanding debt is spread across tens of thousands of issuers, each with its own terms and credit story. Few active participants means even a moderate supply increase can move prices sharply. When a large mutual fund liquidates while new issuance is spiking, sellers who need to close quickly take deep discounts.
Out-of-State Bonds Lose a Tax Layer
Federal exemption is only part of the picture. Most states exempt interest on bonds issued inside their borders from state income tax and tax interest on bonds from other states.5Municipal Securities Rulemaking Board. Tax Treatment A California bond in a New York investor’s account may owe New York tax, which trims the after-tax return.
If your state raises its income tax rate, out-of-state bonds fall further behind in-state alternatives, and their prices can drift lower to compensate. The effect is largest in high-tax states, where the state exemption represents a meaningful share of a bond’s total appeal.
What a Falling Price Actually Means for You
A drop on your statement is not always a reason to sell. Hold an individual muni to maturity and you get face value back, assuming the issuer pays. The price swings along the way are paper losses that only turn real if you sell early. Bond funds work differently: they have no set maturity, so waiting out a downturn is not the same trade.
Harvesting a Loss
If you do sell at a loss, you can use it to offset capital gains elsewhere. The wash sale rule applies, which means you cannot claim the loss if you buy a substantially identical bond within 30 days on either side of the sale. Because individual munis differ by issuer, coupon, maturity, and credit, finding a replacement that keeps your muni exposure without tripping the rule is generally workable.
The Market Discount Trap When Buying In
If falling prices tempt you to buy a discounted muni, know how the tax code treats it. When you buy a bond below face value and later sell at a gain or hold to maturity, the portion of the gain tied to that market discount is ordinary income, not tax-exempt interest and not capital gain.6Office of the Law Revision Counsel. 26 U.S. Code 1276 – Disposition Gain Representing Accrued Market Discount Treated as Ordinary Income A bond originally issued at par that you pick up for 90 cents on the dollar delivers 10 cents per bond of ordinary income at maturity, taxed at your regular rate. That can cut deeply into the return you thought you were getting on a bargain.
Tax-exempt original issue discount bonds, which the issuer sold below par to begin with, generally avoid this problem because the IRS treats their discount differently.7Internal Revenue Service. Guide to Original Issue Discount (OID) Instruments Before buying a discounted muni, check which kind of discount you are looking at.