Almost every bond starts with a borrower, whether that’s a government, company, or a private creditor that takes investor money today with the promise to pay it back with interest. However, rating and yield aside, the core question remains the same: will the borrower be able, and willing, to repay their debt?
Cat bonds work a bit differently, and this blog is meant to help investors better understand the inner workings of these investment vehicles.
Follow the money
When you buy a corporate bond, the company takes the cash and spends it. When you buy a cat bond, the special purpose vehicle (SPV) that issued it puts that money in a collateral account. That cat bond has very specific trigger events, but if no qualifying event occurs, your principal comes back out of that account at maturity. If the trigger event does occur and the money is needed to cover insured losses, some or all of it will go to the sponsor of that bond. Compared to investing in corporate bonds, buying a catastrophe bond is more like putting your money in a safe temporarily, one that can only be opened under very specific circumstances, and which a company can’t access at will.
The SPVs that issue cat bonds are designed to be "bankruptcy remote”, meaning that they are kept separate from the sponsor's other creditors. The structure is designed to protect cat bond investors, but doesn’t eliminate all risk - since these SPVs are how/where the money is retained, but not a factor for when that money needs to be used.
Why the distinction matters now
The IMF reports that global public debt reached nearly 94% of GDP in 2025 and could hit 100% by 2029. Private credit has grown too: i. This doesn’t mean that a debt crisis is coming, but it does mean that much of the global financial markets are tied together by the same variables, key among them: interest rates, refinancing conditions, and liquidity. A portfolio can hold dozens of issuers and still be exposed to all of them at once. Holding the debt of many borrowers isn't the same as owning many sources of risk.
How losses spread, or don't
Imagine a hypothetical fund holding 100 catastrophe bonds, which all have exposure to different regions and different types of perils. Each bond answers only to its pre-determined event(s) and unique trigger(s). A severe Florida hurricane could hit several bonds and have overlapping U.S. wind exposure. However, this storm can’t trigger a Japanese earthquake bond or drain the collateral behind a European windstorm bond.
The global credit market is much more intertwined. In 2008, mortgage losses spread through falling collateral values, which created margin calls and forced selling until assets with no obvious or direct tie to subprime mortgages were dragged down too. An unlevered cat bond portfolio will avoid that type of macro-level chain reaction. (After a major event, cat bond prices can still fall, though, as investors could sell them in an effort to preserve their capital or as trading volume might dry up.)
Different risk, not less risk
Cat bonds can lose money – in some instances, an entire bond issue could be called to cover losses from a trigger event. Their returns depend heavily on how each bond's trigger is designed and on how accurate the catastrophe models are. Most deals are also built for institutions with large denominations, which is why most individuals get exposure through pooled funds. The case for cat bonds isn't that catastrophe risk is small, but that owning cat bonds brings a different exposure from the other fixed income assets held in most diversified portfolios. When asking what has to go wrong for each of a portfolio’s holdings to lose money, cat bonds can provide a genuinely different, and often very specific, answer.
Sources:
King Ride Capital
2025 Global Debt Monitor
Federal Reserve Bank of Chicago
Brookmont Capital Management