Steam Move
A sudden, sharp and widespread movement of a betting line across many bookmakers, usually driven by a wave of professional or syndicate money.
Definition
A steam move is a rapid, coordinated shift in odds across multiple books in a short window, typically caused by respected (sharp) money or syndicates hitting a price at several books at once. It signals where informed money is going, but chasing steam is risky: by the time the move is visible everywhere, the value that prompted it has usually been priced out, and some steam is manufactured to bait followers. It is distinct from gradual line drift driven by public betting or news.
Worked example
An NFL spread moves from -3 to -4.5 across most major books within a few minutes. A bettor who saw the opener at -3 got value; one chasing at -4.5 after the steam is now paying a worse number that already reflects the sharp action.
Why it matters
Recognising steam helps learners understand how prices update in near real time, while pros distinguish genuine sharp moves worth following early from late steam that has no remaining edge.