Trading pool, sweep or office pool if done at work, is a form of financial gaming, specifically a variant of parimutuel trading, where gamblers pay a fixed price into a pool (from which taxes and a house "take" or "vig" are removed), and then predict the future rate of financial instrument (etc. stock, currency, index) at specific time and date. The pool is evenly divided between those that have predict the correct rate or the most approximately. There are no odds involved; each winner's payoff depends simply on the number of players and the number of winners. In an informal game, the vig is usually quite small or non-existent. (True parimutuel trading, which was historically referred to as pool trading, involves both odds calculations and variable wager amounts).