Return on starting bankroll measures total net profit or loss relative to the initial fund set aside for wagering over a given period. If a bettor establishes a specific fund at the start of a season, this metric tracks how much that specific pool of capital has grown or shrunk over time.
In contrast, return on investment per bet, often referred to as yield, evaluates performance against total turnover. This calculation divides net profit by the cumulative sum of every wager placed. In markets with long seasons and frequent action, such as baseball, basketball, hockey, or football, bankroll money is recycled repeatedly, meaning total handle often exceeds the initial starting fund.
Because the same capital is wagered multiple times, a small edge per bet can generate a substantially higher percentage return on the starting bankroll over a large sample. Confusing these two figures can lead bettors to misjudge their edge, assuming their overall bankroll growth rate reflects their average margin on each individual market.
Monitoring both figures provides an accurate picture of performance. Yield highlights market efficiency and pricing advantage on individual wagers, while return on starting bankroll shows how effectively that edge was compounded through volume and capital management.