Sharp money

Sharp money refers to bets placed by bettors sportsbooks have identified, through account history, bet sizing, and timing, as consistently informed or skilled, in contrast to "square" or public money from casual bettors. Books often move a line in response to a comparatively small volume of sharp action, even when the majority of public bets sit on the other side, because sharp money is considered a better signal of an outcome's true probability.

This differs from simple bet-volume or ticket-count metrics, which only show how many separate bets landed on each side, not how much money is behind them or how informed that money is. A line can move against the majority of tickets if a smaller number of larger bets come from accounts a book classifies as sharp, since risk to the book is driven by money wagered, not bet count.

Bettors and analysts watch for indirect signs of sharp money, such as early or unusually fast line movement that runs counter to public betting percentages, as a proxy for where informed money is going, though sportsbooks frequently limit or restrict accounts they identify as consistently sharp, which affects who can actually bet at meaningful size over time. Sharp bettors are generally defined less by short-term results and more by a long-run record of beating the closing line value benchmark against the market's own closing overround-adjusted price.