Municipal Bond Insurance Volume Declines in 2026

Total insured municipal bond volume dropped by 13.4% during the first nine months of the year.

Updated on Oct. 27, 2026 in Construction

Isometric editorial illustration showing a monolithic concrete pillar in a minimalist hall, symbolizing structural bond market trends. — Insured municipal bond volume fell by 13.4% in the first nine months of 2026, totaling $26.9 billion as underwriters adjusted institutional demand. AI Illustration. Upload story photo >

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Municipal bond insurance volume fell to $26.935 billion during the first three quarters of 2026, compared to $33.363 billion during the same period in 2025. This 13.4% year-over-year decrease occurred alongside a 14% increase in the average new-issue deal size.

Why it matters

The decline in volume reflects broader shifts in how underwriters manage institutional demand for long-term municipal debt. Bond insurance utilization notably increased during September 2026 as market volatility spiked.

BAM secured a 51.3% market share in 2026 by insuring $13.817 billion across 615 deals. Meanwhile, Assured Guaranty insured $13.1 billion of primary municipal par during the same nine-month period.

The players

BAM

BAM is a provider of financial guaranty insurance for municipal bonds.

Assured Guaranty

Assured Guaranty is a major provider of financial strength and municipal bond insurance.

The details

Underwriters employed insurance on specific bond maturities to expand institutional interest in longer-dated term securities. BAM alone utilized insurance on over 1,000 individual trades as institutional investors re-offered bonds to the retail market.

2025: Total insured bond volume reached $33.363 billion.
Q1-Q3 2026: Insured bond volume declined 13.4% year-over-year.
September 2026: Market volatility increased bond insurance utilization.

Market Landscape

This contraction in insurance usage mirrors trends observed during the 2008 financial crisis municipal bond market volatility. It reflects a broader shift in how insurers position themselves as risk-mitigation tools during periods of heightened economic uncertainty.

The decline in insured volume may influence the availability of certain long-term bond options for individual retail investors. Shoppers looking for municipal debt instruments should note that insurance utilization remains highly reactive to broader market volatility.

The takeaway

Market volatility serves as a primary driver for institutional reliance on bond insurance to stabilize asset demand. Investors should consider how these shifts in insurance utilization impact the risk profiles of their long-term municipal bond holdings.