The muni market continues to hammer away at long-term tax-free bonds as dealers wonder whether there is sufficient capacity to absorb an onslaught of new paper.

Triple-A rated tax-free bonds with maturities 25 years or more weakened by three basis points Friday, according to the Municipal Market Data scale, with the 30-year yield ticking up to 3.93% — the highest since August. Maturities of 15 years or less were unchanged, according to the MMD scale.

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