Hedge funds pour record capital into catastrophe bonds

News desk: Hedge funds and institutional investors are channeling record levels of capital into insurance-linked securities (ILS), fuelling rapid growth in catastrophe bonds and accelerating a structural shift in the global reinsurance market.

Total outstanding ILS capacity rose to approximately $136 billion in 2025, marking an estimated 18% year-on-year increase, according to data from Aon Plc. The surge reflects strong investor demand for assets that offer relatively high yields and low correlation with traditional asset classes.

Catastrophe bonds, or ‘cat bonds,’ enable insurers to transfer specific disaster risks, such as hurricanes, earthquakes and wildfires, directly to capital markets. In exchange for premium income, investors assume the risk of predefined catastrophic events, potentially earning equity-like returns if losses do not materialise.

‘The pace of issuance has been breathtaking,’ said John Seo, managing director and co-founder of Fermat Capital Management, one of the largest dedicated ILS managers. He noted that 2025 saw a record number of new issuers, with activity expected to remain strong into 2026.

The influx of alternative capital is reshaping an industry traditionally dominated by reinsurers. Confronted with rising catastrophe losses and tighter underwriting capacity, insurers are increasingly turning to capital markets to offload peak risks. Alongside cat bonds, structures such as sidecars, vehicles that allow third-party investors to share underwriting risk and returns, are gaining broader adoption.

Market expansion has also been driven by wider risk coverage. New issuances are increasingly targeting so-called ‘secondary perils,’ including severe convective storms and wildfires, which have become more frequent and costly in recent years.

Industry participants say the growing role of capital markets is improving efficiency, liquidity and diversification in catastrophe risk transfer. However, it is also intensifying competition, compressing spreads and increasing reliance on sophisticated risk modelling to price complex and evolving hazards.

Analysts caution that while returns have been attractive, the asset class remains exposed to climate volatility and model uncertainty, which could result in significant losses under extreme scenarios.

As capital continues to flow into the sector, the reinsurance landscape is evolving into a more integrated model, one in which traditional carriers and capital market investors increasingly operate side by side.