2.1 Causes of Loss / Named-Peril vs. Open-Peril

What a Peril Is

A peril is the direct cause of a loss — fire, windstorm, theft, or hail. Property policies define which perils they will pay for, and that definition drives the entire coverage analysis. Distinguish a peril from a hazard, which is a condition that increases the likelihood or severity of a peril.

Examiners test three hazard types. A physical hazard is a tangible condition such as oily rags or icy steps. A moral hazard is dishonesty, such as an insured who would burn down an unprofitable building. A morale hazard (also called attitudinal hazard) is carelessness or indifference because insurance exists, like leaving a door unlocked.

Named-Peril Coverage

A named-peril form — also called a specified-peril form — pays only for loss caused by a peril expressly listed in the policy. If the cause is not on the list, there is no coverage, even if the loss is sudden and accidental.

The ISO (Insurance Services Office) Basic Causes of Loss form, CP 10 10, lists fire, lightning, explosion, windstorm or hail, smoke, aircraft or vehicles, riot or civil commotion, vandalism, sprinkler leakage, sinkhole collapse, and volcanic action. The Broad form, CP 10 20, adds falling objects, weight of ice/snow/sleet, water damage from plumbing, and limited collapse.

Exam trap: Under any named-peril form, the insured has the burden of proving the loss was caused by a covered peril.

Open-Peril Coverage

An open-peril form — historically called all-risk and now usually labeled special form — covers all direct physical loss to covered property except losses caused by an excluded peril. The ISO Special Causes of Loss form, CP 10 30, is the commercial example; HO-3 and HO-5 are the personal-lines examples.

Because coverage is defined by exclusions rather than a list, the insurer carries the burden of proving that an exclusion applies. This burden-of-proof reversal is the single most-tested distinction between the two systems and is why open-peril coverage costs more.

Named-Peril vs. Open-Peril at a Glance

Exclusions and Concurrent Causation

Every open-peril form excludes certain catastrophic or predictable perils, commonly flood, earth movement (earthquake), war, nuclear hazard, governmental action, ordinance or law, and wear and tear. These are excluded because they are uninsurable on a standard form or require separate coverage (for example, an NFIP flood policy or an earthquake endorsement).

Modern forms use anti-concurrent-causation (ACC) language: if an excluded peril such as flood combines with a covered peril such as wind to cause a single loss, the entire loss is excluded. This phrasing — 'regardless of any other cause or event contributing concurrently or in any sequence' — was central to Hurricane Katrina wind-versus-water litigation.

Direct vs. Indirect Loss

Property exams separate direct loss from indirect (consequential) loss. A direct loss is physical damage to the property itself — the fire that burns the warehouse. An indirect loss is the financial consequence that follows, such as lost rental income or business income while the warehouse is rebuilt.

Named-peril and open-peril forms both describe the direct trigger; time-element coverages such as business income (CP 00 30) and extra expense (CP 00 50) respond to the indirect loss. A common trap: business income payment requires a direct physical loss by a covered peril first — if the underlying peril is excluded, the time-element coverage never attaches.

Reading the Peril Hierarchy on the Exam

Work peril questions in a fixed order. First ask which causes-of-loss form applies (Basic, Broad, or Special). Second, if it is a named-peril form, confirm the cause is on the list; if it is open-peril, scan the exclusions. Third, check whether an anti-concurrent-causation clause drags an otherwise covered loss into exclusion because an excluded peril contributed.

Remember that theft is covered under Special form but is not a Basic-form peril, and water damage from internal plumbing is a Broad-form addition. Knowing which form first introduces each peril is precisely what the licensing exam rewards.

Anti-Concurrent-Causation in Action

The anti-concurrent-causation (ACC) clause is one of the most consequential and tested property provisions. It states that the policy does not cover a loss caused directly or indirectly by an excluded peril, regardless of any other cause or event that contributes concurrently or in sequence. The practical effect: if an excluded peril (such as flood or earth movement) combines with a covered peril (such as wind) to cause a single loss, the ACC language pulls the entire loss into the exclusion.

The classic hurricane example - wind (covered) and storm-surge flooding (excluded) damaging the same structure - turns on whether the damage can be separated; ACC language denies the flood-related portion even though wind contributed.

Named-Peril vs. Open-Peril Burden of Proof

This burden shift is why open-peril (Special) coverage is broader and costs more: the insured only has to show a fortuitous direct physical loss, and the insurer must then point to a specific exclusion. A worked scenario: a pipe bursts and water ruins a floor. Under Broad form the insured shows the loss came from the listed accidental-discharge peril; under Special form the loss is presumed covered unless the insurer proves an exclusion (such as long-term seepage or freezing during an unheated vacancy). Sorting the form type first, then assigning the burden of proof, is the disciplined exam approach to any property-peril question.