Reinsurance involves an insurance company ("cedent") transferring portions of risk from policies it has written to another insurance company ("reinsurer") in exchange for a portion of the premiums. It allows insurance companies to share risk, provide reserves and surplus relief, and enter fronting arrangements where the reinsurer takes on most of the underwriting and claims handling. There are two main types: facultative, which reinsures specific policies; and treaty, where blocks of policies are reinsured under an agreement. Reinsurance can be thought of as the insurance company hedging its bets, similar to how the person running a betting table protects themselves.