Bubble
The last place before the money. Play tightens to a crawl, and the big stacks print — because busting here pays nothing at all.
Twenty-eight players are left and twenty-seven get paid. Everyone at your table has stopped opening pots. Somebody with eight big blinds folds ace-nine under the gun, and they are not being a coward: one more elimination and everyone still standing collects, so the cost of busting right now is the entire prize.
That asymmetry is the bubble, and it is where ICM bites hardest. Chips you win are worth less than the chips you risk, because surviving is worth money on its own. The practical result is that calling ranges collapse — a hand that is comfortably ahead of a shove in chip terms can still be a fold, because losing the flip ends the tournament and winning it only moves you up the counter.
The other half is what that does to the big stacks. A player who covers the table can shove into anyone without ever risking elimination, so their all-in costs them nothing but chips while it costs the caller everything. That is why the correct bubble strategy for a large stack is relentless aggression and for a short one is patience — and why a medium stack, which can neither pressure nor comfortably fold, is the worst place to sit.
The beginner mistake is treating the bubble as a reason to fold everything. Folding is right against a covering stack; it is wrong against a shorter one, and it is wrong when the pay jump above the bubble is small. Once the bubble bursts, the constraint disappears — and the players who tightened for an hour keep tightening long after they should have opened back up.
FAQ
What is the bubble in poker?
The stage of a tournament just before the money, when one more elimination pays everyone still playing. It is the point where survival is worth the most, so calling ranges tighten sharply and the players with big stacks can apply pressure almost for free.
How should you play the bubble?
It depends entirely on your stack. If you cover the table, open and shove relentlessly — you cannot bust and they can. If you are short, fold marginal spots against anyone who covers you, but keep attacking the stacks shorter than yours. Medium stacks suffer most.
What is bubble factor?
A number that says how much more a chip lost costs you than a chip won gains — the ratio ICM puts on the two sides of an all-in. A bubble factor of 1.5 means you need meaningfully more equity to call than the pot odds alone suggest.