The main point of investing for the long term is to make money. But more than that, you probably want to see it rise more than the market average. But Avantor, Inc. (NYSE:AVTR) has fallen short of that second goal, with a share price rise of 48% over five years, which is below the market return. Looking at the last year alone, the stock is up 16%.

So let's investigate and see if the longer term performance of the company has been in line with the underlying business' progress.

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. One way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

During the last half decade, Avantor became profitable. That would generally be considered a positive, so we'd hope to see the share price to rise. Given that the company made a profit three years ago, but not five years ago, it is worth looking at the share price returns over the last three years, too. We can see that the Avantor share price is down 36% in the last three years. During the same period, EPS grew by 4.8% each year. So there seems to be a mismatch between the positive EPS growth and the change in the share price, which is down -14% per year.

You can see how EPS has changed over time in the image below (click on the chart to see the exact values).

Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here.

A Different Perspective

Avantor shareholders gained a total return of 16% during the year. But that was short of the market average. The silver lining is that the gain was actually better than the average annual return of 8% per year over five year. This could indicate that the company is winning over new investors, as it pursues its strategy. 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 Avantor that you should be aware of before investing here.

For those who like to find winning investments this free list of undervalued 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.