Surprisingly Predictable

Catastrophe bonds have historically provided a relatively stable, low-correlation return stream because their losses are driven by insured natural-catastrophe events rather than conventional macroeconomic risks.

• From February 2002 to March 2026, the Swiss Re Cat Bond Total Return Index delivered a 7.7% annualised return with 3.7% volatility, compared with 7.1% and 8.8% for US high yield and 9.6% and 14.8% for the S&P 500.
• Cat bonds had correlations of no more than 0.26 with major traditional asset-class indices and recorded only one negative calendar year, in 2022.
• Unlike conventional bonds, cat bonds are generally fully collateralised through an SPV, with investor funds held in a collateral account and released to the sponsor only if a defined catastrophe trigger occurs.
• Their coupons combine short-term collateral income with an insurance risk spread, giving them floating-rate characteristics and limited duration; this helped investors in 2022 as conventional bond portfolios suffered from rising yields.
• The market has expanded from its origins in the 1990s to USD 24.7 billion of issuance in 2025, more than USD 17 billion in the first half of 2026 and roughly USD 65.6 billion outstanding by June 2026.

Takeaway: Cat bonds can complement traditional fixed income by isolating catastrophe risk from many financial-market risks, but investors must still accept tail risk, model risk and event-driven liquidity risk.