It's not possible to invest over long periods without making some bad investments. But really bad investments should be rare. So take a moment to sympathize with the long term shareholders of NovoCure Limited (NASDAQ:NVCR), who have seen the share price tank a massive 86% over a three year period. That'd be enough to cause even the strongest minds some disquiet. Furthermore, it's down 20% in about a quarter. That's not much fun for holders. We really feel for shareholders in this scenario. It's a good reminder of the importance of diversification, and it's worth keeping in mind there's more to life than money, anyway.

Although the past week has been more reassuring for shareholders, they're still in the red over the last three years, so let's see if the underlying business has been responsible for the decline.

Because NovoCure made a loss in the last twelve months, we think the market is probably more focussed on revenue and revenue growth, at least for now. Generally speaking, companies without profits are expected to grow revenue every year, and at a good clip. Some companies are willing to postpone profitability to grow revenue faster, but in that case one would hope for good top-line growth to make up for the lack of earnings.

Over the last three years, NovoCure's revenue dropped 1.5% per year. That is not a good result. Having said that the 23% annualized share price decline highlights the risk of investing in unprofitable companies. We're generally averse to companies with declining revenues, but we're not alone in that. There's no more than a snowball's chance in hell that share price will head back to its old highs, in the short term.

The company's revenue and earnings (over time) are depicted in the image below (click to see the exact numbers).

We're pleased to report that the CEO is remunerated more modestly than most CEOs at similarly capitalized companies. But while CEO remuneration is always worth checking, the really important question is whether the company can grow earnings going forward. If you are thinking of buying or selling NovoCure stock, you should check out this free report showing analyst profit forecasts.

A Different Perspective

NovoCure shareholders are down 14% for the year, but the market itself is up 24%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. However, the loss over the last year isn't as bad as the 12% per annum loss investors have suffered over the last half decade. We would want clear information suggesting the company will grow, before taking the view that the share price will stabilize. 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. Case in point: We've spotted 1 warning sign for NovoCure you should be aware of.

If you are like me, then you will not want to miss this free list of undervalued small caps 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 American 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.