Spread betting is any of various types of wagering on the outcome of an event where the pay-off is based on the accuracy of the wager, rather than a simple 'win or lose' outcome, such as fixed-odds (or money-line) betting or parimutuel betting.Ī point spread is a range of outcomes and the bet is whether the outcome will be above or below the spread. Type of wagering where the pay-off is based on the accuracy of the wager