Totals Markets in American Football

## NFL Totals: The Most Analysed Market The NFL over/under is one of the most studied markets in sports betting. The combination of massive liquidity, deep public interest, and decades of data makes it highly efficient — but specific inefficiencies remain. ## The Scoring Model NFL scoring is driven by: - **Offensive efficiency:** Yards per play, red zone conversion rate - **Defensive efficiency:** Points allowed per drive, yards allowed per play - **Pace:** Plays per game, time of possession Expected total = Home team expected points + Away team expected points Home expected points = (Home off + Away def) / 2 [adjusted for home advantage ≈ 1.5 pts] ## Key NFL Totals Factors **Weather:** Wind above 15 mph suppresses passing game significantly. In outdoor stadiums, monitor wind speed and direction. Historical data shows totals go Under at higher rates in high-wind conditions. **Division rivalry:** Teams that know each other well tend toward more defensive, lower-scoring games. Intra-division games go Under at slightly higher rates. **Total clustering:** NFL scores cluster at specific totals — 23, 27, 37 — due to scoring unit structure (touchdown = 7, field goal = 3). Models that ignore this clustering are less accurate on whole-number total lines. ## The Public Over Bias Research consistently shows the public bets overs at higher rates than probability warrants — partly because high-scoring games are more exciting to watch. Markets shade slightly toward under value to balance the book. A weak but real edge: under on prime-time games with heavy media attention and expected offensive spectacles.