Math & measurement
Risk of ruin
The probability that a betting bankroll goes to zero before the long run arrives, given a stake size, edge, and variance. Overstaking is its main driver: even a bettor with a real edge who bets 10% of bankroll per play carries a serious chance of busting on an ordinary cold streak.
Related terms
See these numbers on your own bets
Bankroll Guardian tracks every bet and computes your P&L, ROI, CLV, and where you win and leak — free to start, no card required.