While London Security plc (LON:LSC) shareholders are probably generally happy, the stock hasn’t had particularly good run recently, with the share price falling 21% in the last quarter. But at least the stock is up over the last five years. However we are not very impressed because the share price is only up 22%, less than the market return of 69%.

So let’s assess the underlying fundamentals over the last 5 years and see if they’ve moved in lock-step with shareholder returns.

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While the efficient markets hypothesis continues to be taught by some, it has been proven that markets are over-reactive dynamic systems, and investors are not always rational. 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.

During five years of share price growth, London Security achieved compound earnings per share (EPS) growth of 7.5% per year. The EPS growth is more impressive than the yearly share price gain of 4% over the same period. So one could conclude that the broader market has become more cautious towards the stock.

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

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

It is important to consider the total shareholder return, as well as the share price return, for any given stock. The TSR incorporates the value of any spin-offs or discounted capital raisings, along with any dividends, based on the assumption that the dividends are reinvested. Arguably, the TSR gives a more comprehensive picture of the return generated by a stock. We note that for London Security the TSR over the last 5 years was 44%, which is better than the share price return mentioned above. This is largely a result of its dividend payments!

London Security shareholders are down 19% for the year (even including dividends), but the market itself is up 24%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Longer term investors wouldn’t be so upset, since they would have made 8%, each year, over five years. If the fundamental data continues to indicate long term sustainable growth, the current sell-off could be an opportunity worth considering. 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. To that end, you should be aware of the 1 warning sign we’ve spotted with London Security .