The ROI Formula
ROI is the universal metric for investment performance. If you invest $10,000 and receive $13,000 back, your net profit is $3,000 and your ROI is 30%. Simple ROI does not account for time — a 30% return over 1 year is exceptional, but 30% over 10 years is mediocre (only 2.7% annualized). Always consider the holding period when comparing investments.