Which type of risk retains some financial responsibility while transferring the other portion to reinsurers?

The answer regarding which type of risk retains some financial responsibility while transferring the other portion to reinsurers is correct. In proportional reinsurance, the insurer and the reinsurer share the risk and any losses according to a set percentage. This means that when an insurance company underwrites a policy, it retains a certain portion of the risk and transfers the rest to the reinsurer.

For example, if an insurer retains 40% of the risk, it must pay 40% of any claims, while the reinsurer would cover the remaining 60%. This arrangement allows the primary insurer to manage risk more effectively without completely offloading all financial responsibility, hence it retains some financial stakes in the policies it underwrites.

In contrast, facultative reinsurance involves a one-off agreement for individual risks, and treaty reinsurance covers a portfolio of risks under a pre-agreed contract but does not necessarily imply a shared retention percentage like proportional arrangements. Non-proportional reinsurance, on the other hand, kicks in only when losses exceed a certain threshold, leading to a different risk-sharing scenario. Therefore, proportional reinsurance effectively illustrates the mechanism of sharing the financial responsibility while transferring some level of risk.