Throughout the past year and amid the record-breaking issuance levels of 2026, the global catastrophe bond landscape has distinctly pivoted. There's a noticeable inclination towards indemnity-based triggers and per-occurrence coverage, a shift that resonates with both insurance sponsors and capital market investors.
Detailed Analysis of the Catastrophe Bond Market Evolution
Analysis of Artemis' comprehensive catastrophe bond insights vividly illustrates this ongoing transition. The market is progressively embracing indemnity reinsurance protection while concurrently moving away from aggregate reinsurance and retrocessional risk models within the cat bond framework. This evolution is particularly evident as catastrophe bond issuance continues its rapid ascent.
A primary catalyst for this evolving preference lies in the trigger mechanisms adopted by cat bonds, where indemnity protection has emerged as the clear favorite. By August 2026, approximately 78% of all cat bond limits issued and tracked by Artemis featured an indemnity trigger, setting an unprecedented record for the market's operational history. This figure represents a steady increase from prior years: 67.5% in 2022, 72.5% in 2023, 73% in 2024, and 75.6% in 2025.
A significant factor contributing to this trend is the influx of new market participants and first-time catastrophe bond sponsors, predominantly primary insurers. For 2026 alone, fourteen debut sponsors have engaged with cat bonds, signaling a potential new record that could surpass the fifteen new sponsors seen in 2025. As primary insurers increasingly integrate cat bonds into their reinsurance strategies, their preference for indemnity structures that mirror conventional reinsurance arrangements becomes a key driver.
This naturally leads to a greater demand for per-occurrence coverage within the catastrophe bond market. Primary insurers find this structure more congruent with their risk management frameworks. Furthermore, the investor community has also expressed a strong preference for per-occurrence coverage. This sentiment stems from past experiences where lower deductibles, broader peril definitions, and extensive coverage led to more frequent losses on aggregate structures compared to occurrence-based ones.
Just a few years ago, in 2021, aggregate reinsurance limits dominated the catastrophe bond market's outstanding risk capital. However, this dynamic has since reversed. The proportion of aggregate cat bonds has been in steady decline. From 58% in March 2019, it dropped to 51% by June 2021, falling below 50% by November of the same year. This downward trajectory continued, reaching 47.4% by mid-2023. By the close of 2023, aggregate notes constituted only 41.7% of the outstanding market. Currently, Artemis' data indicates that aggregate deals now represent just 36.1% of market limits, while per-occurrence cat bond notes account for a dominant 63.9% of the market's outstanding risk capital.
While investors and cat bond fund managers have shown a clear preference for occurrence-structured investments, a modest increase in aggregate deals was observed in the second quarter. However, this was largely offset by the issuance of several significant indemnity, per-occurrence cat bonds, which further diminished the market's reliance on annual aggregate protection for sponsors. The comprehensive data underpinning these trends is meticulously gathered by Artemis, covering the entire history of the catastrophe bond market and encompassing nearly $224 billion in issuance.
The shifting preferences within the catastrophe bond sector highlight a maturation of the market. Sponsors and investors are refining their risk transfer strategies, seeking greater precision and alignment with their specific needs. This evolving landscape ensures that the catastrophe bond market remains a dynamic and critical component of global risk management and capital deployment.
