Tax-free bond yields are in a sweet spot. Get in before it’s too late.

Yields on municipal bonds have widened sharply relative to corporate bonds over the past two months, particularly when compared on a taxable-equivalent basis. Because municipal bond interest is generally exempt from federal income tax, investors often evaluate these securities using a taxable-equivalent yield — the yield a taxable bond would need to offer to match the after-tax income. When that adjusted gap widens, tax-exempt bonds can look more attractive relative to their corporate counterparts, especially for investors in higher tax brackets.

For market participants, the shift is worth watching for several reasons. It may reflect changing supply and demand dynamics in the muni market, broader rate expectations, or shifting risk appetite among fixed-income investors. Municipal bonds also carry their own considerations, including credit quality, call features, and liquidity, which can differ meaningfully from corporate debt.

What to watch next: whether the yield gap persists or narrows, how new issuance is absorbed, and whether tax policy expectations change the calculus. The relationship is informative, but it is only one input among many in fixed-income portfolio decisions.