a lil c/p for you my friend
Spread betting was invented by Charles K. McNeil, a mathematics teacher from Connecticut who became a bookmaker in Chicago in the 1940s.[4]
The idea became popular in the United Kingdom in the 1980s. In North America, the gambler usually wagers that the difference between the scores of two teams will be less than or greater than the value specified by the bookmaker.
An example:
The bookmaker advertises a spread of 4 points in a certain game;
If the gambler bets on the "underdog", he is said to take the points and will win if the underdog's score plus the spread is greater than the favorite's score.
The eventual score is Underdog 8, Favorite 10: 8 + 4 > 10, so the gambler wins;
The eventual score is Underdog 8, Favorite 13: 8 + 4 < 13, so the gambler loses.
If the gambler bets on the "favorite", he gives the points and will win if the favorite's score minus the spread is greater than the underdog's score:
The eventual score is Underdog 4, Favorite 10: 10 - 4 > 4, so the gambler wins;
The eventual score is Underdog 8, Favorite 10: 10 - 4 < 8, so the gambler loses.
Spreads are frequently, though not always, specified in half-point fractions to eliminate the possibility of a tie, known as a push. In the event of a push, the game is considered no action, and no money is won or lost.