Noun
English Wikipedia has an article on:spread bettingWikipedia
spread betting (uncountable)
A form of gambling (or investment) in which a bookmaker (or broker) predicts a range of outcomes (or share price movements) and the better (or investor) places a stake on a higher or lower result and thus wins or loses a multiple of that stake, the multiple depending on the accuracy of the prediction
Spread betting has moved outside the ambit of sport and financial markets (that is, those dealing solely with share, bonds and derivatives), to cover a wide range of markets, such as house prices. Source: Internet
Spread betting has been a major growth market in the UK in recent years, with the number of gamblers heading towards one million. Source: Internet