The 14% return this week takes NIOX Group's (LON:NIOX) shareholders three-year gains to 146%

It might seem bad, but the worst that can happen when you buy a stock (without leverage) is that its share price goes to zero. But in contrast you can make much more than 100% if the company does well. For example, the NIOX Group Plc (LON:NIOX) share price has soared 146% in the last three years. Most would be happy with that. It's also good to see the share price up 45% over the last quarter.

The past week has proven to be lucrative for NIOX Group investors, so let's see if fundamentals drove the company's three-year performance.

View our latest analysis for NIOX Group

In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

During three years of share price growth, NIOX Group moved from a loss to profitability. Given the importance of this milestone, it's not overly surprising that the share price has increased strongly.

You can see below how EPS has changed over time (discover the exact values by clicking on the image).

It is of course excellent to see how NIOX Group has grown profits over the years, but the future is more important for shareholders. You can see how its balance sheet has strengthened (or weakened) over time in this free interactive graphic.

A Different Perspective

It's nice to see that NIOX Group shareholders have received a total shareholder return of 88% over the last year. Notably the five-year annualised TSR loss of 4% per year compares very unfavourably with the recent share price performance. The long term loss makes us cautious, but the short term TSR gain certainly hints at a brighter future. While it is well worth considering the different impacts that market conditions can have on the share price, there are other factors that are even more important. Consider for instance, the ever-present spectre of investment risk. We've identified 2 warning signs with NIOX Group , and understanding them should be part of your investment process.

If you are like me, then you will not want to miss this free list of growing companies that insiders are buying.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on British exchanges.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.