Alternative describes familiarity, not quality
A corner total, player shot threshold, first-goal time band, next-manager field, and scorecast have different event structures. Grouping them as novelty bets can hide the important work: translating each selection into mutually exclusive settlement states.
Current operator rules illustrate the variation. Betfair's football rules include separate definitions for goalscorers, player statistics, cards, corners, time bands, and competition markets. The existence of a rule does not make the event predictable; it makes the contract auditable.
Seven questions for any unfamiliar market
| Question | Evidence to retain | Failure the check prevents |
|---|---|---|
| What event counts? | Exact market wording | Treating related events as identical |
| What period counts? | Regulation, half, extra time, season, or deadline | Settling against the wrong interval |
| Who supplies the result? | Official result or named statistics provider | Replacing the contract source with a different feed |
| Who must participate? | Starter, any appearance, minutes, or all-in rule | Assuming every non-player is void |
| What outcomes are omitted? | Other, no event, field, or no-goalscorer selection | Understating the complete outcome space |
| What changes settlement? | Abandonment, rescheduling, correction, transfer, or deduction rule | Treating an initial display as final |
| What is the payoff? | Win, loss, refund, half result, dead heat, or fallback | Using the wrong expected-value states |
Event law is not product settlement
The IFAB Laws define on-field events and match procedures. A bookmaker or exchange can then specify which official or third-party record settles its product. For example, a player-prop rule can use a named data provider whose event definition differs from a fan's description of a shot or tackle.
Opta publishes football-stat definitions for many event and possession measures. Those definitions help interpret a feed, but they do not override an operator contract that names another source or applies its own correction window.
Worked audit: first team to five corners
Suppose the visible selection is Team A to reach five corners first. Before assessing the price, write the states:
- Team A takes a fifth qualifying corner before Team B: win.
- Team B takes a fifth qualifying corner first: loss.
- Neither team takes five: settlement depends on whether the market includes a Neither selection or a void rule.
- A corner is awarded but not taken before full time: treatment follows the current operator wording.
- The data feed is corrected: final settlement follows the stated correction policy in the current operator rules.
Betfair's current football rules provide an operator example in which corner markets are settled on corners taken rather than merely awarded. That distinction must be checked for the actual product.
Price the complete state space
For an illustrative three-state market with probabilities 0.44, 0.38, and 0.18, the probabilities sum to one:
Probability total = 0.44 + 0.38 + 0.18 = 1
If the third state is omitted from the analysis, the first two probabilities sum to only 0.82. Renormalising them without explaining the omitted outcome changes the question. Expected value should use every settlement state and its net payoff, following the probability-weighted method described by OpenStax.
When to pass
Do not analyse a market when the current rules cannot answer the event, period, data, participation, correction, or payoff questions. Passing is also appropriate when the displayed field is incomplete, a time-sensitive product lacks a maintainable source, or the available stake cannot be executed at the recorded price.
Next step
Use Player Props Specials for the next part of this topic.
Continue learning
- Next guide: Asian Handicap Betting
- Related guide: Betting Market Liquidity
Assumptions and limitations
Alternative is a descriptive category, not a claim about margin, entertainment, popularity, or profitability. The examples are illustrative. Product names and settlement can change, so archive the current rules and accepted-bet receipt rather than relying on this guide as the contract.

