Generally speaking the aim of active stock picking is to find companies that provide returns that are superior to the market average. And the truth is, you can make significant gains if you buy good quality businesses at the right price. For example, the Shenzhen Mindray Bio-Medical Electronics Co., Ltd. (SZSE:300760) share price is up 43% in the last 5 years, clearly besting the market return of around 15% (ignoring dividends).

In light of the stock dropping 3.4% in the past week, we want to investigate the longer term story, and see if fundamentals have been the driver of the company's positive five-year return.

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. 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 five years of share price growth, Shenzhen Mindray Bio-Medical Electronics achieved compound earnings per share (EPS) growth of 22% per year. This EPS growth is higher than the 7% average annual increase in the share price. So it seems the market isn't so enthusiastic about the stock these days.

You can see how EPS has changed over time in the image below (click on the chart to see the exact values).

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 incorporates the value of any spin-offs or discounted capital raisings, along with any dividends, based on the assumption that the dividends are reinvested. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. We note that for Shenzhen Mindray Bio-Medical Electronics the TSR over the last 5 years was 54%, which is better than the share price return mentioned above. This is largely a result of its dividend payments!

A Different Perspective

While the broader market gained around 14% in the last year, Shenzhen Mindray Bio-Medical Electronics shareholders lost 11% (even including dividends). 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. On the bright side, long term shareholders have made money, with a gain of 9% per year over half a decade. If the fundamental data continues to indicate long term sustainable growth, the current sell-off could be an opportunity worth considering. It's always interesting to track share price performance over the longer term. But to understand Shenzhen Mindray Bio-Medical Electronics better, we need to consider many other factors. To that end, you should be aware of the 1 warning sign we've spotted with Shenzhen Mindray Bio-Medical Electronics .

Of course Shenzhen Mindray Bio-Medical Electronics may not be the best stock to buy. So you may wish to see this free collection of growth stocks.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on Chinese 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.