| 1. Loss must be definite and definable |
| Losses insured against must be definite in terms of time and place.
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| 2. Loss must be accidental
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| Losses are not insurable of they are caused by intentional acts.
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| 3. The insurer must be able to calculate the chance of loss
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| The chance of loss must be predictable from accumulated historical data.
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| 4. The law of large number should apply
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| There must be a large enough number of similar risks to allow predictions.
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| 5. Loss must be great enough to create economic hardship
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| 6. Insurance must be offered at a reasonable cost
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| 7. Loss must not be catastrophic in nature
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| "Catastrophic" in this sense means war, nuclear risk, flood, etc.
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