Calculating the Return on Investment (ROI) is helpful for several reasons:
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It can show the efficiency of an investment: ROI provides a clear measure of how effectively an investment is generating profit relative to its cost. This allows you to compare the profitability of different investments.
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It can practically make a financial decision instead of you: While ROI does not make decisions autonomously, it provides valuable data that can guide informed decision-making about investments, helping stakeholders assess potential risks and rewards.
The other options—such as being absolutely reliable for preventing investment failure and making you look wiser and more dedicated—are less accurate. ROI is a useful tool, but it is not infallible and should be considered alongside other factors and analyses when making financial decisions.