Andrew Poreda, Vice President, Senior Research Analyst at Sage Advisory Services, the fixed income and alternative solutions manager, has highlighted in a new report that catastrophe bonds are superior financial instruments across many risk metrics, with the analyst particularly flagging how they offer diversification to investors when they need it most.
Sage Advisory is still relatively new to the insurance-linked securities (ILS) space, as the firm ventured into the market for the first time last year through its partnership with Cedar Trace Group, the Bermuda-based insurance, reinsurance and asset management specialist, that sees the two companies working together to create and deliver ILS-enhanced credit opportunities to investors.
In the firm’s latest report, Poreda explains that typically most portfolios look diversified, but in practice, they are still driven by the same underlying risks: equity risk, credit risk, and interest rate risk. All of which show up in different forms, such as public vs. private, fixed vs. floating, however when things default, they tend to do so all together.
Therefore, Poreda notes that the case for catastrophe bonds is not that they are another alternative. Instead, they introduce a genuinely differentiating risk premium and source of return.
In particular, Poreda highlights how cat bonds deliver diversification for investors when they need it most.
“Cat bonds generate positive returns in roughly 79% of equity down months, averaging +0.25% in those periods. That is not just losing less – but a genuinely different and positive outcome,” Poreda explains.
“It is well documented that catastrophe bonds exhibit low correlation to traditional asset classes — a characteristic well-supported by the structural independence of the underlying risk drivers of the cat bond market and one that has been consistent across extended economic and financial market cycles,” the VP continued.
“However, average correlations do not tell the entire story. The more relevant question for allocators is how an asset class behaves during periods of equity stress – particularly given the high overall allocation to equities in most institutional portfolios. In this regard, catastrophe bonds stand apart.”
Analysing a 10-year period ending May 5th, 2026, the report highlights that cat bonds didn’t just limit losses during the S&P 500’s 34 down months, they actually posted positive returns. During those specific months, the S&P 500 averaged a –4.2% drop, according to Sage Advisory.
“That is a fundamentally different outcome than what most fixed income or credit allocations delivered during periods of equity stress. For additional context, the S&P 500 averaged a negative return of 4.2% across those same 34 months while the cat bond market delivered a positive return of 0.25%,” Poreda explains.
He continued: “This reflects causality, not coincidence. Equity drawdowns are driven by periods of economic or financial market stress. Cat bond outcomes are driven by the presence or absence of catastrophic events. This distinction suggests the diversification benefits of an allocation to cat bonds are structural in nature rather than merely statistical.”
However, as the VP indicates, the diversification benefits are not only visible in months of equity stress, but they are also demonstrably visible across extended periods of time, across full market cycles.
Moving forward, the property and casualty insurance market’s sustained cost pressures from social inflation, climate risks and ability to reprice is also flagged in the report.
“Social inflation refers to the rising cost of liability claims that exceed standard economic inflation – driven by shifting societal attitudes, aggressive legal tactics, and changing jury behaviors that result in massive lawsuit payouts. Social inflation has emerged as the dominant force reshaping the economics of insurance, with the Swiss Re Social Inflation Index reaching 7% in 2023, a 20-year peak,” the report reads.
The magnitude of this shift is evident in the underlying loss trends and litigation data, as US commercial casualty losses grew at an annualised rate of 11% in 2023, reaching $143 billion, a high level that even exceeded global natural catastrophe insured losses of $108 billion that same year.
“These trends are not abstract. They flow directly into the cost of reinsurance and, therefore, to cat bond pricing. Higher claims costs, larger jury awards, and the increasing cost of litigation all increase the price that insurers and reinsurers charge for coverage. That repricing benefits cat bond investors as the insurance risk premium rises, thus generating higher forward expected returns,” Poreda added.
The VP also explained that following Hurricane Ian in September 2022, cat bond spreads widened from approximately 7% to over 11% within months. On top of this. the Swiss Re Global Cat Bond Index then delivered a return of +19.7% in 2023 and +17.3% in 2024.
However, following Hurricanes Katrina, Rita, and Wilma, all of which struck the Americas during the historic 2005 Atlantic hurricane season, the index returned +12.0% in 2006 and then +15.4% in 2007.
“The pattern is consistent: short-term losses lead to long-term gains, as capacity contracts, pricing improves, and patient capital is rewarded,” Poreda said.
Furthermore, the report addresses how despite its diversification benefits, cat bonds also carry real risks.
“Catastrophe models are imperfect, and actual losses have exceeded modeled expectations for some historical events, while the pace of climate trends could make certain assumptions more problematic. Single extreme events can produce meaningful losses at the individual bond level, including a total loss of principal for specific tranches,” the report reads.
In addition, liquidity may also deteriorate in the immediate aftermath of a major event. While, post major loss events, there is also potential for capital to become temporarily trapped in structures while ultimate loss determinations are ongoing, which can ultimately create a period of illiquidity that extends beyond normal secondary market conditions.
“These risks should not be minimized, but they are manageable through disciplined diversification across perils, regions, and structures; appropriate position sizing (i.e., avoiding concentrated portfolios); and thoughtful manager selection,” Poreda concludes.
