Catastrophe bond

Catastrophe bonds (also known as cat bonds) are risk-linked securities that transfer a specified set of risks from a sponsor to investors. They were created and first used in the mid-1990s in the aftermath of Hurricane Andrew and the Northridge earthquake.

Catastrophe bonds emerged from a need by insurance companies to alleviate some of the risks they would face if a major catastrophe occurred, which would incur damages that they could not cover by the premiums, and returns from investments using the premiums, that they received. An insurance company issues bonds through an investment bank, which are then sold to investors. These bonds are inherently risky, generally BB, and usually have maturities less than 3 years. If no catastrophe occurred, the insurance company would pay a coupon to the investors. On the contrary, if a catastrophe did occur, then the principal would be forgiven and the insurance company would use this money to pay their claim-holders. Investors include hedge funds, catastrophe-oriented funds, and asset managers. They are often structured as floating-rate bonds whose principal is lost if specified trigger conditions are met. If triggered the principal is paid to the sponsor. The triggers are linked to major natural catastrophes. Catastrophe bonds are typically used by insurers as an alternative to traditional catastrophe reinsurance.

For example, if an insurer has built up a portfolio of risks by insuring properties in Florida, then it might wish to pass some of this risk on so that it can remain solvent after a large hurricane. It could simply purchase traditional catastrophe reinsurance, which would pass the risk on to reinsurers. Or it could sponsor a cat bond, which would pass the risk on to investors. In consultation with an investment bank, it would create a special purpose entity that would issue the cat bond. Investors would buy the bond, which might pay them a coupon of LIBOR plus a spread, generally (but not always) between 3 and 20%. If no hurricane hit Florida, then the investors would make a positive return on their investment. But if a hurricane were to hit Florida and trigger the cat bond, then the principal initially contributed by the investors would be transferred to the sponsor to pay its claims to policyholders. The bond would technically be in default and be a loss to investors.

...
Wikipedia