CAT Bond Issuance Hits Record High As Reinsurance Capital Floods Market

Abundant capital pushed reinsurance and insurance-linked securities pricing lower at mid-year renewals, according to AM Best.
By: | September 1, 2026
CAT bond market growth

Total issuance in the 144A property catastrophe bond market climbed to $17.3 billion in the first six months of 2026, breaking the prior first-half record, according to AM Best.

Second-quarter issuance alone reached $11.3 billion, surpassing the previous quarterly record set in the second quarter of 2025 and exceeding the total annual issuance recorded in most years of the CAT bond market’s history, AM Best said.

The surge reflects a broader dynamic in the reinsurance market: three consecutive years of strong returns have left capacity providers with more capital than they can prudently deploy, AM Best said, and the first half of 2026 brought the lowest level of insured catastrophe losses in five years, further swelling the capital base.

Softer Pricing Across Reinsurance and ILS Markets

Mid-year 2026 property catastrophe renewals were described by AM Best as orderly and increasingly favorable to reinsurance buyers, with capacity supply estimated to have exceeded demand by more than 25%.

Guy Carpenter’s Global Property Catastrophe Rate-on-Line Index fell 16% year-to-date through July 1, 2026, and June 1 renewals centered on Florida saw risk-adjusted pricing decline 15% to 20%, extending broad rate decreases seen in 2025, according to the report. Terms and conditions remained largely stable, though AM Best noted early signs of softening, including wider availability of aggregate excess-of-loss and subsequent event coverage, as well as broader natural peril coverage.

Larger reinsurance buyers were able to use their market power to secure aggregate cover for frequency risk, while other cedents turned to parametric solutions to fill gaps, AM Best said.

The softening extended to the ILS market, where returns compressed even as they remained positive. The Swiss Re Global CAT Bond Index posted a 4.1% return for the first half of 2026, up from 2.8% in the same period of 2025, while the ILS Advisers Index rose to 3.9% from 2.3%, according to AM Best. The improvement over 2025, when returns were dented by California wildfires, masks an underlying trend of spread tightening and lower collateral yields rather than a benign loss environment, AM Best said.

The weighted average spread on 144A CAT bonds fell 96 basis points even as weighted average expected loss rose 30 basis points compared with bonds issued in the first half of 2025, a divergence AM Best attributed to abundant investor capital and growing exposure.

Capacity Keeps Expanding, Led by US Insurers

Guy Carpenter and AM Best estimated ILS capacity at $123 billion at year-end 2025, with continued growth projected through 2026. The outstanding size of the 144A CAT bond segment reached approximately $64 billion by mid-year after new issuance exceeded the volume of maturing bonds, AM Best said.

Large nationwide U.S. primary insurers accounted for 28% of first-half 2026 issuance by sponsor type, with small- to medium-sized U.S. domestic insurers contributing 33%, according to AM Best’s data. Florida takeout companies were cited as a growing source of demand, as Citizens Property Insurance Corp.’s policy count fell from more than 1.4 million at its September 2023 peak to below 300,000 by June 2026, shifting exposure to takeout carriers that have turned to the CAT bond market.

Eleven first-time CAT bond sponsors entered the market in the first half of 2026, up from nine in the first half of 2025, AM Best said.

Notable debut issuances included Integral Reinsurance Ltd.’s $275 million Windrose Re Ltd. bond covering U.S. named storms, and first CAT bonds from the Kyrgyz Republic and Tajikistan Republic, each sponsoring $80 million through the Asian Development Bank for earthquake and extreme precipitation risk.

Beyond CAT bonds, AM Best estimated the property and casualty sidecar market at $17 billion to $19 billion, collateralized reinsurance at $37 billion to $41 billion, and industry loss warranty capacity at $3 billion to $5 billion, with casualty sidecars identified as a segment poised for further growth.

Obtain the full report here.

The R&I Editorial Team can be reached at [email protected].

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