If you love investing in stocks you're bound to buy some losers. But the last three years have been particularly tough on longer term Generac Holdings Inc. (NYSE:GNRC) shareholders. Regrettably, they have had to cope with a 54% drop in the share price over that period. The falls have accelerated recently, with the share price down 32% in the last three months. Of course, this share price action may well have been influenced by the 13% decline in the broader market, throughout the period.

With that in mind, it's worth seeing if the company's underlying fundamentals have been the driver of long term performance, or if there are some discrepancies.

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To quote Buffett, 'Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace...' 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.

Generac Holdings saw its EPS decline at a compound rate of 14% per year, over the last three years. This reduction in EPS is slower than the 23% annual reduction in the share price. So it's likely that the EPS decline has disappointed the market, leaving investors hesitant to buy.

The company's earnings per share (over time) is depicted in the image below (click to see the exact numbers).

We know that Generac Holdings has improved its bottom line lately, but is it going to grow revenue? This free report showing analyst revenue forecasts should help you figure out if the EPS growth can be sustained.

A Different Perspective

Investors in Generac Holdings had a tough year, with a total loss of 17%, against a market gain of about 7.4%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. On the bright side, long term shareholders have made money, with a gain of 2% per year over half a decade. If the fundamental data continues to indicate long term sustainable growth, the current sell-off could be an opportunity worth considering. Before spending more time on Generac Holdings it might be wise to click here to see if insiders have been buying or selling shares.

If you like to buy stocks alongside management, then you might just love this free list of companies. (Hint: many of them are unnoticed AND have attractive valuation).

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.