Ideally, your overall portfolio should beat the market average. But every investor is virtually certain to have both over-performing and under-performing stocks. At this point some shareholders may be questioning their investment in Pioneer Bancorp, Inc. (NASDAQ:PBFS), since the last five years saw the share price fall 24%.

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

Check out our latest analysis for Pioneer Bancorp

To quote Buffett, 'Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace...' 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 the unfortunate half decade during which the share price slipped, Pioneer Bancorp actually saw its earnings per share (EPS) improve by 5.7% per year. So it doesn't seem like EPS is a great guide to understanding how the market is valuing the stock. Alternatively, growth expectations may have been unreasonable in the past.

Due to the lack of correlation between the EPS growth and the falling share price, it's worth taking a look at other metrics to try to understand the share price movement.

In contrast to the share price, revenue has actually increased by 7.2% a year in the five year period. A more detailed examination of the revenue and earnings may or may not explain why the share price languishes; there could be an opportunity.

The company's revenue and earnings (over time) are depicted in the image below (click to see the exact numbers).

You can see how its balance sheet has strengthened (or weakened) over time in this free interactive graphic.

A Different Perspective

Pioneer Bancorp shareholders gained a total return of 13% during the year. But that return falls short of the market. On the bright side, that's still a gain, and it is certainly better than the yearly loss of about 4% endured over half a decade. So this might be a sign the business has turned its fortunes around. It's always interesting to track share price performance over the longer term. But to understand Pioneer Bancorp better, we need to consider many other factors. To that end, you should be aware of the 1 warning sign we've spotted with Pioneer Bancorp .

If you are like me, then you will not want to miss this free list of undervalued small caps that insiders are buying.

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.