It might seem bad, but the worst that can happen when you buy a stock (without leverage) is that its share price goes to zero. But if you buy shares in a really great company, you can more than double your money. For example, the Astro-century Education&Technology Co.,Ltd (SZSE:300654) share price has soared 161% in the last three years. How nice for those who held the stock! It's also good to see the share price up 64% over the last quarter. But this move may well have been assisted by the reasonably buoyant market (up 32% in 90 days).

Since the stock has added CN¥406m to its market cap in the past week alone, let's see if underlying performance has been driving long-term returns.

To quote Buffett, 'Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace...' 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.

During three years of share price growth, Astro-century Education&TechnologyLtd achieved compound earnings per share growth of 6.9% per year. In comparison, the 38% per year gain in the share price outpaces the EPS growth. This indicates that the market is feeling more optimistic on the stock, after the last few years of progress. That's not necessarily surprising considering the three-year track record of earnings growth. This optimism is also reflected in the fairly generous P/E ratio of 113.01.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

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?

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. 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. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. We note that for Astro-century Education&TechnologyLtd the TSR over the last 3 years was 167%, which is better than the share price return mentioned above. This is largely a result of its dividend payments!

A Different Perspective

Investors in Astro-century Education&TechnologyLtd had a tough year, with a total loss of 9.8% (including dividends), against a market gain of about 11%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. On the bright side, long term shareholders have made money, with a gain of 22% 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. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. For example, we've discovered 1 warning sign for Astro-century Education&TechnologyLtd that you should be aware of before investing here.

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of companies that have proven they can grow earnings.

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.