It hasn't been the best quarter for Clean Harbors, Inc. (NYSE:CLH) shareholders, since the share price has fallen 14% in that time. But over five years returns have been remarkably great. In that time, the share price has soared some 334% higher! So it might be that some shareholders are taking profits after good performance. Of course what matters most is whether the business can improve itself sustainably, thus justifying a higher price.

So let's assess the underlying fundamentals over the last 5 years and see if they've moved in lock-step with shareholder returns.

In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

During five years of share price growth, Clean Harbors achieved compound earnings per share (EPS) growth of 34% per year. That makes the EPS growth particularly close to the yearly share price growth of 34%. Therefore one could conclude that sentiment towards the shares hasn't morphed very much. Indeed, it would appear the share price is reacting to the EPS.

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

It's good to see that there was some significant insider buying in the last three months. That's a positive. On the other hand, we think the revenue and earnings trends are much more meaningful measures of the business. This free interactive report on Clean Harbors' earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

A Different Perspective

Investors in Clean Harbors had a tough year, with a total loss of 0.6%, against a market gain of about 10%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Longer term investors wouldn't be so upset, since they would have made 34%, each year, over five years. It could be that the recent sell-off is an opportunity, so it may be worth checking the fundamental data for signs of a long term growth trend. 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. Even so, be aware that Clean Harbors is showing 2 warning signs in our investment analysis , you should know about...

Clean Harbors is not the only stock that insiders are buying. For those who like to find lesser know companies 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 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.