Parametric coverage pays a predetermined amount when a storm meets defined triggers — a wind speed at a location, a hurricane category, a storm track within a radius — regardless of the actual damage sustained. A wind deductible buy-down instead reduces the deductible on your indemnity property policy, so it responds to your real, adjusted loss.
Indemnity vs. trigger
Parametric’s appeal is speed and simplicity: if the trigger is met, it pays quickly, with no lengthy claims adjustment, which can be valuable for immediate cash needs after a storm. Its risk is basis risk — the payout may be more or less than your actual loss, because it is tied to the parameter, not the damage. A buy-down is indemnity-based: it reduces what you retain on your actual covered loss, so it tracks real damage but follows the normal claims process. Some owners pair a buy-down for real-loss protection with a small parametric layer for fast liquidity. The choice hinges on whether you value payout certainty and speed or loss-matched accuracy.