1. Required difference between a universal life insurance policy’s death benefit and the policy’s cash value. This difference is a specific percentage according to the insured’s age. If a policy’s cash value exceeds the required percentage of the death benefit (intrudes on the corridor), the policy is considered an investment contract instead of an insurance contract. Also called TEFRA corridor. 2. In reinsurance, an amount of insurance that is in excess of the ceding company’s retention limit but is less than the reinsurer’s minimum cession.