Return on Investment (ROI)
So, you want to know how your investment is performing? The return on investment, a percentage or ratio, can be used to compare the efficiency of different investments.
Understanding this one is probably a good idea, and hopefully the ROI is a gain and not a loss!
To calculate ROI, divide the return of an investment by its cost. It reveals the gain relative to the size of the investment.
As well as being used for personal finance decisions, it is also used as a measure of business performance.