Understanding Expected Value

What EV Actually Is

EV answers one question: "If I placed this same bet 1,000 times… would I make money?"

It's a long-run average, not a prediction for tonight.

The Core Idea

Every bet has two ingredients: Probability (how often it should win) and Price (what you're getting paid).

EV is simply comparing those two things.

Simple Example

You believe a bet wins 55% of the time. The book is pricing it like it wins 52.4% (that's -110).

That gap = your edge. Over time, you profit from that difference, even though you'll still lose ~45% of the time.

What EV Is NOT

The biggest misconception: Positive EV ≠ "this will win"

You can make a great EV bet and lose. You can make a terrible EV bet and win.

That's variance doing its job.

EV Is a Long-Run Game

You don't "realize" EV in one bet. You realize it over 100 bets, 500 bets, 1,000+ bets.

Short term = noise. Long term = signal.

Always Compare EV

Don't view it in isolation. Is this better than other options on the slate? Is this the best use of bankroll right now?

Sometimes the correct move is: "There are no good bets today."

Small Edges Matter More Than Big Opinions

You don't need 70% win rates or "locks." You need consistent 2–5% edges.

That's where real money comes from.

EV Without Discipline Is Useless

You can find edge and still lose if you bet too much on one game, stack correlated bets, or chase losses.

That's why EV must be paired with risk control and exposure limits.