The main aim of stock picking is to find the market-beating stocks. But in any portfolio, there will be mixed results between individual stocks. So we wouldn't blame long term China Merchants Port Group Co., Ltd. (SZSE:201872) shareholders for doubting their decision to hold, with the stock down 24% over a half decade.

It's worthwhile assessing if the company's economics have been moving in lockstep with these underwhelming shareholder returns, or if there is some disparity between the two. So let's do just that.

View our latest analysis for China Merchants Port Group

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. One flawed but reasonable way to assess how sentiment around a company has changed is to compare the earnings per share (EPS) with the share price.

While the share price declined over five years, China Merchants Port Group actually managed to increase EPS by an average of 7.0% per year. Given the share price reaction, one might suspect that EPS is not a good guide to the business performance during the period (perhaps due to a one-off loss or gain). Or possibly, the market was previously very optimistic, so the stock has disappointed, despite improving EPS.

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.

We note that the dividend has fallen in the last five years, so that may have contributed to the share price decline.

The image below shows how earnings and revenue have tracked over time (if you click on the image you can see greater detail).

Balance sheet strength is crucial. It might be well worthwhile taking a look at our free report on how its financial position has changed over time.

What About Dividends?

As well as measuring the share price return, investors should also consider the total shareholder return (TSR). 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. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. As it happens, China Merchants Port Group's TSR for the last 5 years was -0.8%, which exceeds the share price return mentioned earlier. This is largely a result of its dividend payments!

A Different Perspective

While it's never nice to take a loss, China Merchants Port Group shareholders can take comfort that , including dividends,their trailing twelve month loss of 1.3% wasn't as bad as the market loss of around 3.9%. Given the total loss of 0.2% per year over five years, it seems returns have deteriorated in the last twelve months. While some investors do well specializing in buying companies that are struggling (but nonetheless undervalued), don't forget that Buffett said that 'turnarounds seldom turn'. 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. Take risks, for example - China Merchants Port Group has 1 warning sign we think you should be aware of.

But note: China Merchants Port Group may not be the best stock to buy. So take a peek at this free list of interesting companies with past earnings growth (and further growth forecast).

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.