Municipal bonds are losing value right now for one dominant reason and several supporting ones: interest rates sit well above the levels that prevailed when many outstanding bonds were issued, so those older, lower-coupon bonds have to trade at a discount to compete. Inflation, credit downgrades, shifting federal tax policy, and surges in new issuance can each push prices the same direction. Whether your loss is a temporary paper markdown or a signal of something worse depends on which of these is driving it.
Rising Interest Rates
Bond prices and interest rates move opposite each other. When newly issued municipal bonds carry higher coupons, older bonds with lower fixed payments become less attractive, and the only way to sell one is to drop the price until a buyer’s total return matches what a fresh bond would deliver. This repricing is automatic and touches every fixed-rate bond in the secondary market.
Duration, measured in years, tells you how sensitive a specific bond is. A bond with a duration of seven years will fall roughly 7% in price for every one-percentage-point rise in rates, and rise by about the same when rates fall. Longer maturities carry higher duration, which is why a 20-year muni swings far more 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 remain well above the near-zero levels of much of the 2010s. A bond issued to yield 2.5% in a market now paying 3.5% has to sell at a meaningful discount, and that gap explains a large share of what investors are seeing on their statements.
Inflation Eating Into Real Returns
Every fixed coupon loses value in real terms when prices rise. If your bond pays 4% and consumer prices are climbing 5%, your real return is negative even though the dollar amount of each check is unchanged.
When investors expect higher inflation ahead, they demand higher yields as compensation. Because the coupon is locked in at issuance, yield can only rise if price falls. Sellers accept lower prices because buyers will not pay full value for cash flows shrinking in purchasing power. The effect is largest at the long end of the curve, where payments stretch 15 or 20 years out and inflation over that span is hardest to predict.
Weakening Issuer Credit
Every muni carries the credit risk of the government behind it. When Moody’s or Standard & Poor’s downgrades a bond, the market marks it down: buyers demand a higher yield to accept a higher risk of missed payments. Warning signs that precede formal action, including unfunded pension liabilities and persistent budget deficits, often trigger sell-offs on their own.
The Investment-Grade Line
The cutoff between investment grade and speculative grade sits at BBB- for S&P and Baa3 for Moody’s. A downgrade that crosses that line can force selling, because many pension funds and insurance companies are prohibited from holding speculative debt. That wave of forced selling drives prices down further than 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 that project underperforms, the bondholder feels it directly. Muni defaults are rare overall, with investment-grade issues historically defaulting at a small fraction of the corporate rate. Still, the possibility of restructuring under Chapter 9 of the federal Bankruptcy Code, which lets a municipality adjust its debts when it cannot meet them, can drive sharp price drops long before any actual default.2Office of the Law Revision Counsel. 11 U.S.C. Chapter 9 – Adjustment of Debts of a Municipality
Shifts in Federal Tax Policy
The reason most people buy munis is that interest on most state and local bonds is excluded from federal gross income.3Office of the Law Revision Counsel. 26 U.S.C. 103 – Interest on State and Local Bonds For investors in high brackets, a 3.5% tax-free coupon can beat a 5% or 6% taxable corporate bond on an after-tax basis.
When Congress cuts income tax rates, that advantage shrinks. Taxable bonds keep more of what they earn, muni demand softens, and prices fall to close the gap. Rising rates work the other way and tend to support muni prices.
The 2026 TCJA Sunset
The individual provisions of the Tax Cuts and Jobs Act were set to expire after 2025. If they lapse without congressional action, most brackets rise, with the top marginal rate reverting from 37% to 39.6%. Higher rates would make munis more valuable. Uncertainty about whether Congress will extend, modify, or let the provisions expire moves prices in both directions, because bond markets price in expected outcomes ahead of any final vote.
Private Activity Bonds and the AMT
One slice of the muni market gets less favorable treatment than most buyers assume. Interest on “specified private activity bonds,” which finance things like airports, housing developments, 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 the AMT hits you, that interest is effectively taxable, and the pricing advantage disappears. When AMT exposure expands across the investor base, private activity bonds lose value relative to other munis.
A Flood of New Supply
Muni prices follow basic supply and demand. When states and localities issue heavy volumes to fund infrastructure or refinance older debt, the new supply can outrun buyer appetite, and sellers have to cut prices to move bonds.
Liquidity in the muni market is thinner than in Treasuries or corporates. Roughly $4 trillion in outstanding debt is spread across tens of thousands of issuers, each with its own terms and credit profile. In a thin market, even a moderate jump in supply can produce sharp declines, and if a large mutual fund is liquidating at the same moment new issuance spikes, sellers who need to move quickly accept steep discounts.
State Tax Treatment and Out-of-State Bonds
Federal exemption is only half the picture. Most states exempt interest on their own bonds from state income tax but tax interest on bonds issued elsewhere.5Municipal Securities Rulemaking Board. Tax Treatment A California bond held by a New York resident may owe New York tax on its interest, which shrinks the after-tax return and makes the bond less competitive with in-state options.
If your state raises its income tax rate, the penalty for holding out-of-state bonds grows, and those bonds can slip in value relative to in-state issues. The effect is largest in high-tax states where the state exemption represents a real portion of the total after-tax appeal.
What a Price Drop Actually Means for You
A lower market price is not always a reason to sell. If you own an individual muni and hold it to maturity, you get the full face value back, assuming the issuer does not default. Interim price swings are paper losses that only become real if you sell early. Bond funds work differently: they have no set maturity date, so you cannot simply wait out a downturn the way you can with a single bond.
Tax-Loss Harvesting
Selling at a loss lets you offset capital gains elsewhere in your portfolio. The wash sale rule still applies, so you cannot claim the loss if you buy a substantially identical bond within 30 days before or after the sale. Because individual munis differ by issuer, coupon, maturity, and credit quality, finding a replacement that keeps your muni exposure without triggering the rule is generally easier than it is with stocks.
The Market Discount Trap When Buying Cheap
If you are thinking about picking up a muni that has already fallen, know how the tax code treats market discount bonds. When you buy a bond below face value and later sell at a profit or hold to maturity, the gain attributable to the discount is taxed as ordinary income, not as tax-exempt interest and not as a capital gain.6Office of the Law Revision Counsel. 26 U.S. Code 1276 – Disposition Gain Representing Accrued Market Discount Treated as Ordinary Income A par bond bought at 90 cents on the dollar produces 10 cents of ordinary income per bond at maturity, taxed at your regular rate, which can wipe out much of the after-tax return you thought you were getting.
Tax-exempt original issue discount bonds, which the issuer sold below par to begin with, generally do not create this problem, because the IRS handles that discount under different rules.7Internal Revenue Service. Guide to Original Issue Discount (OID) Instruments The distinction matters when you go shopping for discounted munis: a bond trading below par because the market moved is taxed differently than one sold below par at issuance.