Bettors frequently track performance using percentage returns, but conflating return on starting bankroll with return on investment per wager creates distorted expectations. Return on starting bankroll measures total net profit or loss relative to the original capital set aside for betting. It reflects how much the overall fund has grown or shrunk over a defined period.
In contrast, return on investment per bet—frequently referred to as yield—measures profit relative to total turnover. Turnover is the cumulative amount staked across all wagers combined. Because standard bankroll management involves risking only a small fraction of capital on any single contest, total turnover routinely exceeds the starting bankroll once dozens or hundreds of games are played.
This difference explains why the two metrics diverge significantly over time. A modest, single-digit return per bet can compound into a substantial percentage gain on the starting bankroll as funds are recycled through the market. Conversely, mistaking bankroll growth for a per-wager advantage leads bettors to overestimate their edge on any individual ticket and take on excessive risk.
Keeping these measurements separate allows market participants to evaluate their performance accurately across the NBA, NFL, MLB, and NHL. Return on starting bankroll tracks portfolio growth, while yield evaluates market efficiency and wager selection. Monitoring both without confusing the two provides a clearer picture of how volume and edge combine over the long run.