Moneyline Betting

The moneyline is the whole of betting in its simplest form: pick who wins, get paid according to how unlikely that was.

Reading the price

Negative odds mark the favourite and show what you must risk to win 100. Positive odds mark the underdog and show what 100 wins you.

A game priced −350 / +280 is saying the favourite wins about 77.8% of the time and the underdog about 26.3%. Those sum to 104.1%, and the extra 4.1 percentage points is the book's hold. Normalise them and the market's real opinion is roughly 74.7% / 25.3%.

That normalisation step is not optional. Judged against the raw 77.8%, the favourite always looks like a bad bet — because the posted number is deliberately worse than fair. The no-vig calculator does it in one step.

When the moneyline is the right market

Low-scoring sports. In baseball, hockey and soccer, one goal or one run decides an enormous share of games. Upsets are frequent, prices are compressed into a narrow range, and the moneyline is where the volume goes.

Genuine coin flips. When a game is close to pick-em, the spread adds little and the moneyline is a cleaner expression of the same view.

When you specifically believe in an upset. A spread caps your upside at roughly even money; an underdog moneyline pays for the thing you actually think will happen.

When it isn't

Heavy favourites in football and basketball. Laying −600 to win a small amount means a single upset erases six wins. The breakeven win rate at −600 is 85.7%, and being wrong about that is expensive.

Three-way moneylines

In soccer and other sports where a draw is a real result, the market has three outcomes rather than two: home, away and draw. The de-vig arithmetic is the same, just across three prices instead of two.

Related structures exist to handle the draw differently. Draw-no-bet returns your stake if the game is drawn, which lowers the price in exchange for removing that risk. Double chance covers two of the three outcomes at a much shorter price. Both are conveniences with the vig priced in accordingly.

Correlation with the spread

A team winning and a team covering are strongly related — in the NFL that relationship sits around 0.78, and in the NBA around 0.81. That is intuitive and it has a concrete consequence: parlaying a team's moneyline with its spread is close to betting the same thing twice, and books price same-game combinations knowing this.

Correlation in same-game parlays covers where that relationship can actually be exploited.

How WeBall grades moneylines

Match outcome is a binary event, derived from a paired Poisson matchup model that estimates each side's expected scoring rate and computes the probability of every result from that pair. Three-way markets, draw-no-bet and double chance all resolve from the same underlying model, which is why they stay consistent with one another.