Yield

Profit as a percentage of total amount staked, summed across a period. £100 profit on £2,000 staked = 5% yield. Used as the headline metric in tipster track records. Professional sports betting yields rarely exceed 5-10% over thousands of bets; anything higher in a long sample suggests either a real edge or insufficient sample size. Compare to ROI, which is sometimes calculated against bankroll rather than turnover.