An organization of insurers or reinsurers through which particular types of risks are shared or pooled. The risk of high loss by any particular insurance company is transferred to the group as a whole (the insurance pool) with premiums, losses, and expenses shared in agreed amounts. The advantage of a pool is that the size of expected losses can be predicted for the pool with much more certainty than for any individual party to it. Pooling arrangements are often used for catastrophic coverage or for certain high risk populations like the disabled. Pooling may also be clone within a single company by pooling the risks insured under various different policies so that high losses incurred by one policy are shares with other.