To evaluate your investment performance, you can use a simple formula: \( \text{Return on Investment (ROI)} = \frac{(\text{Current Value} - \text{Initial Investment})}{\text{Initial Investment}} \times 100 \). For example, if you've invested $1,000, and it’s now worth $1,500, your calculation would be: \( \text{ROI} = \frac{(1500 - 1000)}{1000} \times 100 = 50\% \). This means you've earned a 50% return on your investment over that period.

Return on Investment (ROI) is a performance measure used to evaluate the efficiency or profitability of an investment. It compares the gain or loss from an investment relative to its cost. ROI is expressed as a percentage and helps investors understand how well their investments are doing compared to other investment options or overall market performance.