For many, the main point of investing is to generate higher returns than the overall market. But every investor is virtually certain to have both over-performing and under-performing stocks. So we wouldn't blame long term Koppers Holdings Inc. (NYSE:KOP) shareholders for doubting their decision to hold, with the stock down 14% over a half decade. On the other hand, we note it's up 9.4% in about a month.

Check out our latest analysis for Koppers Holdings

While the efficient markets hypothesis continues to be taught by some, it has been proven that markets are over-reactive dynamic systems, and investors are not always rational. 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.

Koppers Holdings became profitable within the last five years. That would generally be considered a positive, so we are surprised to see the share price is down. Other metrics may better explain the share price move.

In contrast to the share price, revenue has actually increased by 1.5% a year in the five year period. So it seems one might have to take closer look at the fundamentals to understand why the share price languishes. After all, there may be an opportunity.

You can see how earnings and revenue have changed over time in the image below (click on the chart to see the exact values).

It's good to see that there was some significant insider buying in the last three months. That's a positive. That said, we think earnings and revenue growth trends are even more important factors to consider. If you are thinking of buying or selling Koppers Holdings stock, you should check out this free report showing analyst profit forecasts.

A Different Perspective

While the broader market gained around 3.4% in the last year, Koppers Holdings shareholders lost 9.0%. 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. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 2.8% over the last half decade. We realise that Buffett 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 businesses. Investors who like to make money usually check up on insider purchases, such as the price paid, and total amount bought. You can find out about the insider purchases of Koppers Holdings by clicking this link.

Koppers Holdings is not the only stock that insiders are buying. For those who like to find winning investments this free list of growing companies with recent insider purchasing, could be just the ticket.

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

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.