By buying an index fund, you can roughly match the market return with ease. But if you choose individual stocks with prowess, you can make superior returns. Just take a look at Kirby Corporation (NYSE:KEX), which is up 88%, over three years, soundly beating the market return of 16% (not including dividends). However, more recent returns haven't been as impressive as that, with the stock returning just 56% in the last year.

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.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

Kirby was able to grow its EPS at 54% per year over three years, sending the share price higher. The average annual share price increase of 23% is actually lower than the EPS growth. So it seems investors have become more cautious about the company, over time.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail).

It is of course excellent to see how Kirby has grown profits over the years, but the future is more important for shareholders. This free interactive report on Kirby's balance sheet strength is a great place to start, if you want to investigate the stock further.

A Different Perspective

It's good to see that Kirby has rewarded shareholders with a total shareholder return of 56% in the last twelve months. Since the one-year TSR is better than the five-year TSR (the latter coming in at 8% per year), it would seem that the stock's performance has improved in recent times. In the best case scenario, this may hint at some real business momentum, implying that now could be a great time to delve deeper. 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. Case in point: We've spotted 1 warning sign for Kirby you should be aware of.

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of companies that have proven they can grow earnings.

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.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team@simplywallst.com