We think intelligent long term investing is the way to go. But that doesn't mean long term investors can avoid big losses. For example the Vuzix Corporation (NASDAQ:VUZI) share price dropped 57% over five years. That's not a lot of fun for true believers. We also note that the stock has performed poorly over the last year, with the share price down 49%. Furthermore, it's down 44% in about a quarter. That's not much fun for holders. We note that the company has reported results fairly recently; and the market is hardly delighted. You can check out the latest numbers in our company report.

With the stock having lost 27% in the past week, it's worth taking a look at business performance and seeing if there's any red flags.

See our latest analysis for Vuzix

Vuzix isn't currently profitable, so most analysts would look to revenue growth to get an idea of how fast the underlying business is growing. Generally speaking, companies without profits are expected to grow revenue every year, and at a good clip. That's because fast revenue growth can be easily extrapolated to forecast profits, often of considerable size.

In the last half decade, Vuzix saw its revenue increase by 15% per year. That's a pretty good rate for a long time period. The share price return isn't so respectable with an annual loss of 9% over the period. It seems probably that the business has failed to live up to initial expectations. A pessimistic market can create opportunities.

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

We like that insiders have been buying shares in the last twelve months. Having said that, most people consider earnings and revenue growth trends to be a more meaningful guide to the business. If you are thinking of buying or selling Vuzix stock, you should check out this free report showing analyst profit forecasts.

A Different Perspective

Vuzix shareholders are down 49% for the year, but the market itself is up 10%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 9% per year over five years. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. Take risks, for example - Vuzix has 2 warning signs we think you should be aware of.

There are plenty of other companies that have insiders buying up shares. You probably do 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 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.