Correct ROI Formula, Examples And Calculation

When monitoring your investments, it’s important to stay realistic. If the broader stock market is struggling, it’s unreasonable to expect strong returns from individual stocks or stock funds. In such cases, selling and replacing them with others might not improve your overall performance, nor will moving everything to a savings account likely benefit you in the long run.

Conversely, during a market uptrend, consider replacing stocks that are underperforming. If a company’s financial health deteriorates significantly, it might be wise to divest and avoid further losses. Balancing your portfolio in response to these conditions can help align your investments with your financial goals.

ROI formula and examples

The essence of performance testing lies in calculating the return on investment (ROI), which measures how much you earn relative to your initial investment, known as the principal. For instance, if you invest $1,000 and it grows to $2,000, your ROI is $1,000, or 100%. If a different $1,000 investment grows to $1,500, your ROI is $500, or 50%. Conversely, it’s important to remember that investments can also yield negative returns.

ROI = Net Income / Cost of Investment

or

ROI = Investment Gain / Investment Base

To accurately compare the performance of different investments, it’s crucial to use the annual percent return, which reflects the average percentage gain or loss each year over a given period. For example, if you buy a stock at $15 per share and sell it at $20 per share within a year, your rate of return is 33% ($5 profit divided by $15 initial investment). However, if this gain occurs over five years, the average annual return would be approximately 7%, as the profit is spread out over a longer timeframe.

MEASURING TOTAL RETURN
An investment’s total return encompasses both changes in its market value and any income it generates, regardless of whether that income is reinvested or taken as cash. This includes stock dividends, bond interest, and income distributions from mutual funds and other pooled investments. By factoring in these components, you get a comprehensive view of your investment’s performance.

Change in value +/– Income = Total return

You don’t need to sell your investment to calculate its total return; you can determine it based on your unrealized gains or losses. This is known as a paper profit or paper loss, reflecting the potential return without having to actually realize it by selling the investment.

Getting a good return on investments

There isn’t a universal benchmark for what constitutes a good return, as it can vary by investment type and market conditions. Historical average returns for different asset classes, like small company stocks, are well-documented, and mutual fund performance is regularly reported. Comparing your investments’ returns against these benchmarks can provide a starting point for evaluation.

Additionally, consider the inflation rate when assessing returns. To truly grow your investment’s value, your return must exceed the inflation rate. The real return is calculated by subtracting the inflation rate from the reported return.

Figuring return is not that simple

Determining the actual return on your investments can be complex due to several factors:

1. Variable Investment Amounts: Investment portfolios are dynamic, with funds frequently moving in and out, which affects the calculation of returns.
2. Different Calculation Methods: Return calculations can vary based on whether they are averaged or compounded, significantly impacting the reported rate of return.
3. Varying Holding Periods: The timing of buying and selling investments can greatly influence your overall return.
4. Difficult-to-Measure Investments: Some investments, like limited partnerships or certain real estate holdings, are not publicly traded and thus harder to value precisely.
5. Diverse Evaluation Standards: Investments such as limited partnerships or real estate require different evaluation criteria compared to stocks or bonds, including their contribution to portfolio diversification.

Additionally, bond investing carries its own risks:

• Default Risk: Issuers might default on their obligations.
• Interest Rate Risk: Rising interest rates can reduce the value of existing bonds, as newer bonds might offer higher rates.
• Inflation Risk: Fixed interest payments on bonds can lose purchasing power over time. For instance, a 30-year bond paying $50 annually will be worth less in real terms at the end of the term due to inflation.

Compound vs average rate of return

Here are six sets of investment returns, each totaling a 27% gain over three years. Although the average annualized return for each is 9%, the compound annual returns differ considerably. For instance, investment set 6, despite having the highest one-year return of 40%, provided the lowest compound return. This is because it also experienced significant losses of –5% and –8% in the first two years, leading to an initial deficit that heavily impacted the overall performance.

Using benchmarks

When assessing the performance of your investments, it’s crucial to compare them against other similar investments with comparable characteristics and return potential, such as large US corporations or telecommunications companies. This is where benchmarks come into play. A benchmark is an index or average that represents the performance of a specific financial market or sector, providing a standard for evaluating how well an investment is doing within that market or sector.

For instance, the Standard & Poor’s 500 Index (S&P 500) measures the performance of 500 major, widely-held US companies. It serves as the benchmark for large-cap US stocks and the mutual funds and ETFs that invest in them. There are also benchmarks for small and mid-sized companies, long-term government bonds, various mutual fund types, and many other market segments, both domestically and internationally.

Using a benchmark to compare your investments is only meaningful if the investment falls within the segment that the benchmark represents. You can typically find a list of relevant benchmarks on the website of the company you’re interested in.

Wishing you a great week!