Kirby Corporation (NYSE:KEX) shareholders have seen the share price descend 19% over the month. But that doesn't change the fact that the returns over the last three years have been pleasing. To wit, the share price did better than an index fund, climbing 74% during that period.

While this past week has detracted from the company's three-year return, let's look at the recent trends of the underlying business and see if the gains have been in alignment.

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. 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).

Kirby became profitable within the last three years. So we would expect a higher share price over the period.

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

It is of course excellent to see how Kirby has grown profits over the years, but the future is more important for shareholders. You can see how its balance sheet has strengthened (or weakened) over time in this free interactive graphic.

A Different Perspective

We're pleased to report that Kirby shareholders have received a total shareholder return of 29% over one year. Since the one-year TSR is better than the five-year TSR (the latter coming in at 3% per year), it would seem that the stock's performance has improved in recent times. Given the share price momentum remains strong, it might be worth taking a closer look at the stock, lest you miss an opportunity. 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. Case in point: We've spotted 1 warning sign for Kirby you should be aware of.

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.