What a +EV bet actually is
Expected value, the math behind every Veritas Signals pick. Why a +5% EV bet can still lose — and why that is consistent with probability.
Expected value (EV) is the per-bet profit you would average if you placed the same wager an infinite number of times. It is not a promise about one event.
Every Veritas Signals pick is sized by EV: take the model's calibrated probability that the bet wins, multiply by what you would receive if it did, and subtract what you would lose if it did not. If that number is positive after costs, the pick is +EV.
- Stake1 unit
- Model probability of winning55%
- Decimal odds1.95
- EV per bet(0.55 × 0.95) − (0.45 × 1.00) = +0.07u
Why +EV bets still lose
If a coin lands heads 55% of the time, it still lands tails 45% of the time. A +EV bet at 55% probability loses almost half the days you place it. That's not the model malfunctioning. That's the model functioning correctly inside a noisy universe.
What kills +EV
- Taking worse odds than the price the model was built around (line shopping matters).
- Betting too large per pick so a normal losing streak liquidates the bankroll before the edge can repeat.
- Adding picks together into a parlay, which compounds the books' margin against you.
- Treating a winning week as confirmation, or a losing week as falsification. Both are inside the noise band.