Expected Value Edge Case Checklist
Expected value edge case checklist for catching zero probabilities, asymmetric payoffs, hidden costs, dependence, bankroll limits, and stopping rules.
Candidates doing final expected value practice and mistake review.
Check net payoffs
Confirm whether each payoff is gross prize, net profit, or loss after cost. Many EV errors start with the wrong payoff convention.
Check probability edge cases
Look for zero-probability branches, impossible states, probabilities that do not sum to one, and events that are not actually independent.
Check hidden costs
Entry fees, spread, commissions, sample costs, and opportunity costs can turn a positive gross calculation into a negative net decision.
Check path constraints
Repeated bets, bankroll limits, drawdowns, and stopping rules can matter even when the one-shot expected value is straightforward.
Check objective
The prompt may ask for maximum expected value, fair price, probability threshold, minimum acceptable offer, or risk-aware choice. These are not the same answer.
Common mistakes
Candidates often finish after the first EV number. A final edge-case pass catches the assumptions most likely to break the answer.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.