For catastrophe bond investors, the trigger type is the single most important structural feature. It determines how quickly payouts occur, who bears basis risk, and how closely your loss is tied to the sponsor’s actual experience. The two dominant trigger families—indemnity and parametric—sit at opposite ends of a tradeoff between precision and speed.
The Core Tradeoff: Precision vs Speed
Indemnity triggers tie payouts to the sponsor’s actual reported losses. Parametric triggers tie payouts to objective physical measurements (e.g., wind speed at a named location, earthquake magnitude). That difference drives almost everything else: basis risk, payout timing, and typical use cases.
Indemnity Triggers
How they work: The bond’s terms reference the sponsor’s own loss experience. When the sponsor’s aggregated losses from a covered event exceed an attachment point (and, in many structures, stay below an exhaustion point), the bond pays. Independent calculation agents verify loss data; payout timing is typically weeks to months after the event.
Advantages for sponsors: No basis risk. If the sponsor’s losses are large enough, the bond pays. That alignment makes indemnity the preferred structure for many (re)insurers; it represents the majority of the market by volume (roughly three-quarters of outstanding cat bonds in recent years).
Advantages for investors: The trigger is tied to real economic loss, not a proxy. In principle, you are taking “pure” insurance risk rather than model or index basis risk.
Drawbacks for investors: Payout is slow. Capital is locked during the loss-development period. Disputes over loss calculation, though rare, can delay or complicate payouts. You are also exposed to the sponsor’s reporting and the calculation agent’s process.
Parametric Triggers
How they work: Payout is determined by one or more objective parameters—e.g., wind speed at a defined station, central pressure, earthquake magnitude and location, or industry loss indices. When these parameters exceed (or meet) predefined thresholds, the trigger fires. No need to wait for actual claims; data often come from public or designated sources (e.g., meteorological agencies, seismic networks).
Advantages for investors: Very fast payout—often days to a few weeks. Clear, auditable criteria. No dependence on the sponsor’s loss reporting. Popular in sovereign and public-sector deals (e.g., World Bank–style catastrophe bonds) where rapid fiscal relief is a priority.
Drawbacks for investors: Basis risk. The parameter may not match the sponsor’s (or the economy’s) actual loss. A bond might trigger when the sponsor’s losses are small, or fail to trigger when losses are large. That mismatch is the price of speed and objectivity.
Side-by-Side Comparison
| Dimension | Indemnity | Parametric |
|---|---|---|
| Payout speed | Weeks to months | Days to weeks |
| Basis risk (investor) | Low (tied to sponsor loss) | Higher (index/parameter vs actual loss) |
| Basis risk (sponsor) | Effectively none | Can be material |
| Transparency | Depends on calculation agent and terms | High (objective data) |
| Typical sponsors | (Re)insurers, large corporates | Sovereigns, public entities, some insurers |
| Market share (approx.) | ~76% of issuance | Significant in sovereign/parametric programs |
When Each Type Is Used
Indemnity dominates when the sponsor is an insurer or reinsurer that wants coverage aligned exactly with its own loss. Most peak-peril, multi-year cat bond programs from (re)insurers are indemnity-based.
Parametric is common when the sponsor needs quick liquidity (e.g., governments after a disaster) or when the exposure is hard to indemnify (e.g., aggregate industry loss, or a country’s fiscal exposure). Parametric structures are also used in multi-peril or index-based programs where simplicity and speed matter more than perfect loss alignment.
Implications for Portfolio Construction
- Diversification: Holding both indemnity and parametric bonds can diversify trigger risk. Parametric adds exposure to index/parameter basis; indemnity adds exposure to loss development and reporting.
- Liquidity and timing: Parametric bonds resolve quickly after an event; indemnity bonds can leave capital in limbo longer. That can affect how you size positions and manage liquidity around peak seasons.
- Pricing: Parametric deals often offer a spread premium for basis risk and for the sponsor’s preference for certainty and speed. Comparing yields across trigger types should account for these structural differences.
Bottom Line
Indemnity triggers prioritize loss alignment and sponsor comfort; parametric triggers prioritize speed and objectivity at the cost of basis risk. There is no universally “better” type—only a tradeoff. Understanding that tradeoff is essential for evaluating individual bonds and for building a cat bond portfolio that matches your risk and liquidity preferences.