Celanese Corporation (NYSE:CE) shareholders should be happy to see the share price up 14% in the last month. But that cannot eclipse the less-than-impressive returns over the last three years. Truth be told the share price declined 14% in three years and that return, Dear Reader, falls short of what you could have got from passive investing with an index fund.

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.

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.

Celanese saw its EPS decline at a compound rate of 7.0% per year, over the last three years. This fall in the EPS is worse than the 5% compound annual share price fall. So, despite the prior disappointment, shareholders must have some confidence the situation will improve, longer term.

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

We consider it positive that insiders have made significant purchases in the last year. Having said that, most people consider earnings and revenue growth trends to be a more meaningful guide to the business. This free interactive report on Celanese's earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

What About Dividends?

As well as measuring the share price return, investors should also consider the total shareholder return (TSR). The TSR is a return calculation that accounts for the value of cash dividends (assuming that any dividend received was reinvested) and the calculated value of any discounted capital raisings and spin-offs. It's fair to say that the TSR gives a more complete picture for stocks that pay a dividend. As it happens, Celanese's TSR for the last 3 years was -8.7%, which exceeds the share price return mentioned earlier. This is largely a result of its dividend payments!

A Different Perspective

Celanese shareholders gained a total return of 15% during the year. But that return falls short of the market. The silver lining is that the gain was actually better than the average annual return of 5% per year over five year. This could indicate that the company is winning over new investors, as it pursues its strategy. It's always interesting to track share price performance over the longer term. But to understand Celanese better, we need to consider many other factors. For instance, we've identified 3 warning signs for Celanese (2 are significant) that you should be aware of.

Celanese 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.