As an investor its worth striving to ensure your overall portfolio beats the market average. But if you try your hand at stock picking, you risk returning less than the market. We regret to report that long term Columbia Banking System, Inc. (NASDAQ:COLB) shareholders have had that experience, with the share price dropping 41% in three years, versus a market return of about 20%. And the share price decline continued over the last week, dropping some 6.2%.

With the stock having lost 6.2% in the past week, it's worth taking a look at business performance and seeing if there's any red flags.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. 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.

Columbia Banking System saw its EPS decline at a compound rate of 11% per year, over the last three years. The share price decline of 16% is actually steeper than the EPS slippage. So it seems the market was too confident about the business, in the past. This increased caution is also evident in the rather low P/E ratio, which is sitting at 8.09.

The graphic below depicts how EPS has changed over time (unveil 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. Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here..

What About Dividends?

It is important to consider the total shareholder return, as well as the share price return, for any given stock. 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. We note that for Columbia Banking System the TSR over the last 3 years was -30%, which is better than the share price return mentioned above. This is largely a result of its dividend payments!

A Different Perspective

Investors in Columbia Banking System had a tough year, with a total loss of 2.2% (including dividends), against a market gain of about 28%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 1.6% per year over five years. Generally speaking long term share price weakness can be a bad sign, though contrarian investors might want to research the stock in hope of a turnaround. It is all well and good that insiders have been buying shares, but we suggest you check here to see what price insiders were buying at.

If you like to buy stocks alongside management, then you might just love this free list of companies. (Hint: most of them are flying under the radar).

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.