pool

1. A temporary affiliation of two or more people formed for the purpose of attempting to manipulate a security's price and/or volume. The pool is necessary in order to acquire the capital needed to manipulate a stock having a large market value. Pools were especially popular in the 1920s and early 1930s, but now have been regulated out of existence. See also blind pool, trading pool.
2. See mortgage pool.
3. A group of insurers and reinsurers who join together to share risks and premiums.