Generally speaking long term investing is the way to go. But unfortunately, some companies simply don't succeed. For example the Ingevity Corporation (NYSE:NGVT) share price dropped 55% over five years. We certainly feel for shareholders who bought near the top. Unfortunately the share price momentum is still quite negative, with prices down 15% in thirty days.

After losing 5.4% this past week, it's worth investigating the company's fundamentals to see what we can infer from past performance.

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. One flawed but reasonable way to assess how sentiment around a company has changed is to compare the earnings per share (EPS) with the share price.

In the last half decade Ingevity saw its share price fall as its EPS declined below zero. This was, in part, due to extraordinary items impacting earnings. At present it's hard to make valid comparisons between EPS and the share price. However, we can say we'd expect to see a falling share price in this scenario.

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

Dive deeper into Ingevity's key metrics by checking this interactive graph of Ingevity's earnings, revenue and cash flow.

A Different Perspective

While the broader market gained around 25% in the last year, Ingevity shareholders lost 18%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 9% over the last half decade. 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. For example, we've discovered 1 warning sign for Ingevity that you should be aware of before investing here.

But note: Ingevity may not be the best stock to buy. So take a peek at this free list of interesting companies with past earnings growth (and further growth forecast).

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.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team@simplywallst.com