What is a same-game multi (SGM)?

What is a same-game multi?

A same-game multi — sometimes called a same-game parlay — is one bet made up of several selections from a single fixture. A typical AFL example might be “Team A to win” plus “a named player to have over 25 disposals” plus “over a set total number of goals in the match”. All three legs are packaged into one bet, and all three have to come in for the bet to be paid. If any single leg loses, the whole SGM loses.

That all-or-nothing structure is what makes an SGM appealing but also higher-variance than a single bet: you are stacking several outcomes, so the chance of the whole thing landing is lower than any one leg on its own.

How are SGMs priced?

With a normal multi across different games, the legs are treated as independent events, so the price is roughly the individual decimal odds multiplied together. An SGM is different, because legs from the same game are often correlated — the outcome of one leg changes the likelihood of another.

Take “Team A to win” and “Team A's star forward to score over X points”. If the forward has a big game, Team A is more likely to win — the two legs move together. Multiplying their odds as if they were independent would misprice the bet. Instead, bookmakers use a correlation adjustment: a model that estimates how the legs relate and re-prices the combined bet accordingly. When legs are positively correlated the SGM is usually priced shorter (lower odds) than the naive multiplication, because the combination is more likely than independence would suggest. Some books also block leg combinations that are too strongly correlated. On top of the correlation model, each book adds its own margin, the same way it does on any market.

Why do SGM prices differ between books?

There is no single “correct” SGM price. Each bookmaker estimates the correlation between legs with its own model, starts from its own single-leg prices, and applies its own margin. Small differences in any of those inputs compound across several legs, so the same combination of selections can be priced noticeably differently from one book to the next — and one book may allow a combination another refuses.

That is why the price you are quoted for an SGM is best understood as one bookmaker's opinion, not a fixed value. It also means the only reliable way to know whether a price is competitive is to compare the exact same multi across several books.

How to compare SGMs

To compare same-game multis fairly, hold the legs constant and change only the book: build the identical combination of selections at each bookmaker and read off the combined price. Because the correlation adjustment and margin differ, the shortest single leg does not always come from the book with the best combined SGM. It also helps to sanity-check each leg — an SGM is only as sound as its weakest selection, so understanding the underlying expected value of the legs and the closing-line value you are getting matters more than the headline multi price.

You can start with the free tools: side-by-side comparisons and the betting calculators, including the expected value (EV) calculator, help you judge whether a leg is worth including in the first place.

How HaterPicks helps with SGMs

HaterPicks includes a cross-book same-game multi builder: you assemble the legs you want and it prices that exact combination across the Australian books it covers, so you can see how the same SGM stacks up rather than trusting a single quote. It sits on top of the same graded player-prop projections used elsewhere in the product, so the individual legs can be weighed on their own merits. See how it works for the full picture.

A note on risk

Same-game multis are higher-variance than single bets: because every leg has to land, they tend to lose more often, with the payoff concentrated in the times they all come in. They are entertainment, not a strategy for reliable returns, and nothing here is betting advice — it is research and education. Betting is 18+ only; gamble responsibly.