Record ILS capital flows to risks the traditional market avoids

Insurance-linked securities outstanding capital hit a record $144.5 billion at the half-year mark of 2026, and the composition beneath that number shows the soft cycle directing new money into exactly the layers traditional reinsurance is stepping away from. Moody's Ratings, compiling the figure from Aon data, calls the sector a deep and resilient pool of risk capital: a description that does more work than it appears.

The composition matters more than the total. Catastrophe bonds outstanding climbed to roughly $63.4 billion, up 17% year over year and nearly double their 2021 level, while reinsurance sidecars hit about $23 billion, up roughly 50% since the end of 2024, Moody's says, citing Aon. Aon's own report puts new catastrophe bond issuance over the twelve months to June at $24.9 billion, the highest on record and 15% above the previous peak.

All of that supply is landing while traditional reinsurance rates fall fast: Guy Carpenter's Global Property Catastrophe Rate-On-Line Index dropped 16% over the 2026 renewals, the steepest annual decline since the late 1990s, leaving pricing 22% to 23% below its 2024 hard-market peak though still above the last soft-market low of 2017. Moody's attributes the softening to abundant capital and several consecutive quarters without a major individual catastrophe loss, and cat bond spreads have followed the traditional market lower even as the average expected loss of new issuance has edged higher.

Normal softenings compress spreads because risk is cheaper; this one compresses them on instruments whose expected loss is rising. Moody's says pricing has compressed most sharply on remote tail layers with expected losses below 2%, while higher-frequency lower layers have eased less, mirroring the traditional market's demand curve — a terms-led repricing that this publication has argued the post-hard-market capital overhang would produce.

The same overhang shows up on the financing side of the reinsurance complex, where Fidelis Partnership's refinancing replaced a private-credit unitranche with a cheaper public loan and saves roughly $46 million a year that the MGA is putting toward Lloyd's and Pine Walk growth. It is the same pattern from a different instrument: capital is plentiful and flows toward anything that still pays.

The more consequential shift is where the new ILS money goes. Moody's says investors are allocating more capital toward higher-expected-loss structures — aggregate covers, frequency protection, and secondary perils like wildfire, flood, and severe convective storm — broadening the range of risks insurers can transfer to capital markets, including perils that have historically been hard to place. It also increases exposure to modeling uncertainty and loss volatility, and multi-peril aggregate bonds have historically been one of the main sources of investor losses.

The logic is straightforward: with remote tail spreads compressed to the point of thin compensation, the remaining yield sits in structures that carry more certainty of attachment, and moving up the expected-loss spectrum is how a portfolio holds its return. The danger is that current pricing reflects the conditions that produced the quiet loss period, not the conditions that will follow it.

The returns so far are forgiving: the Swiss Re Global Cat Bond Index returned 11.4% in 2025, a third consecutive double-digit year, and 4.1% in the first half of 2026, with low correlation to equity and bond markets. But that performance was earned before the current crop of aggregate and secondary-peril bonds has been tested, and the record was built during the same stretch that produced those returns — several consecutive quarters without a major individual catastrophe loss. The capital markets are now underwriting tail risk at the very moment the traditional market has stepped back from it.

The $144.5 billion record is a capacity number; the risk is in what was bought with it. The capital markets have become the marginal source of insurance risk capital in this cycle, and the spreads they demand for hard-to-place perils will decide whether the asset class keeps the credibility it built in the hard market. Watch the first multi-peril aggregate loss that arrives after a run of quiet quarters. That event, not the record total, will show whether these bonds were priced or just paid.