Expected Value
Expected value combines probability and payoff. A decision can lose in the short term and still have positive expected value if the estimated probability is high enough relative to the offered price.
Simple Example
Suppose an outcome is priced at +120, which implies about 45.5%. If your well-supported estimate is 50%, the difference may indicate positive expected value. The estimate must be credible; optimism alone is not an edge.
Price Sensitivity
A good prediction at the wrong price can be a poor decision. As odds shorten, the break-even probability rises. This is why Sports4Play separates the question “who is more likely to win?” from “does the available price offer value?”
Uncertainty Matters
Models and estimates are imperfect. +EV is not a guarantee of profit on any individual event, and small perceived edges can disappear when the underlying inputs are uncertain.