Generally speaking the aim of active stock picking is to find companies that provide returns that are superior to the market average. And while active stock picking involves risks (and requires diversification) it can also provide excess returns. For example, long term Zhejiang Dahua Technology Co., Ltd. (SZSE:002236) shareholders have enjoyed a 40% share price rise over the last half decade, well in excess of the market return of around 13% (not including dividends).

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

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, Zhejiang Dahua Technology achieved compound earnings per share (EPS) growth of 21% per year. The EPS growth is more impressive than the yearly share price gain of 7% over the same period. Therefore, it seems the market has become relatively pessimistic about the company. This cautious sentiment is reflected in its (fairly low) P/E ratio of 7.85.

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

We're pleased to report that the CEO is remunerated more modestly than most CEOs at similarly capitalized companies. But while CEO remuneration is always worth checking, the really important question is whether the company can grow earnings going forward. Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here..

What About Dividends?

As well as measuring the share price return, investors should also consider the total shareholder return (TSR). Whereas the share price return only reflects the change in the share price, the TSR includes the value of dividends (assuming they were reinvested) and the benefit of any discounted capital raising or spin-off. Arguably, the TSR gives a more comprehensive picture of the return generated by a stock. As it happens, Zhejiang Dahua Technology's TSR for the last 5 years was 52%, which exceeds the share price return mentioned earlier. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

While the broader market lost about 8.2% in the twelve months, Zhejiang Dahua Technology shareholders did even worse, losing 13% (even including dividends). Having said that, it's inevitable that some stocks will be oversold in a falling market. The key is to keep your eyes on the fundamental developments. Longer term investors wouldn't be so upset, since they would have made 9%, each year, over five years. It could be that the recent sell-off is an opportunity, so it may be worth checking the fundamental data for signs of a long term growth trend. It's always interesting to track share price performance over the longer term. But to understand Zhejiang Dahua Technology better, we need to consider many other factors. Even so, be aware that Zhejiang Dahua Technology is showing 2 warning signs in our investment analysis , and 1 of those is potentially serious...

But note: Zhejiang Dahua Technology 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.