Why Odds Move, and What the Movement Tells You

Odds move for three reasons: new information such as team news or weather, liability balancing when too much money lands on one side, and sharp action when respected accounts back a price. Only the first and third tell you anything useful.

The distinction matters because a price shortening on public money means the crowd likes it, which is weak information at best. A price shortening quickly at several books simultaneously, without obvious news, usually means someone with a good model has moved it. Those moves tend to hold to kickoff.

For a practical read: check whether the move happened everywhere or at one book, and whether it followed news. A single book moving alone is usually balancing its own liability. Every book moving together is the market changing its mind, which is worth respecting even when you disagree.

Key points

Movement across all books at once is a market signal
Movement at one book alone is usually liability balancing
Team news explains most large moves near kickoff
A price that shortens and holds is more meaningful than one that drifts back

Frequently asked

Should I follow a shortening price?

Sometimes. If it moved on sharp action and held, the closing price is likely to be lower still. If it moved on public money after a media story, it is often an overreaction.

Is it better to bet early or late?

Early if you have information the market has not priced; late if you want the most accurate price and the best team news. Both are defensible; betting at neither is not.

What is a steam move?

A rapid, coordinated shortening across multiple books, usually driven by respected money. It is the clearest signal available in the market.

Put it to use

Why Odds Move, and What the Movement Tells You

Key points

Frequently asked

Put it to use

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