By buying an index fund, investors can approximate the average market return. But if you buy good businesses at attractive prices, your portfolio returns could exceed the average market return. Just take a look at Jiangsu Lettall Electronic Co.,Ltd (SHSE:603629), which is up 76%, over three years, soundly beating the market decline of 19% (not including dividends).

Since the stock has added CN¥437m to its market cap in the past week alone, let's see if underlying performance has been driving long-term returns.

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 way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

Jiangsu Lettall ElectronicLtd was able to grow its EPS at 0.9% per year over three years, sending the share price higher. This EPS growth is lower than the 21% average annual increase in the share price. This indicates that the market is feeling more optimistic on the stock, after the last few years of progress. It's not unusual to see the market 're-rate' a stock, after a few years of growth. This optimism is also reflected in the fairly generous P/E ratio of 83.10.

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. It's always worth keeping an eye on CEO pay, but a more important question is whether the company will grow earnings throughout the years. This free interactive report on Jiangsu Lettall ElectronicLtd's earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

What About Dividends?

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. 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. It's fair to say that the TSR gives a more complete picture for stocks that pay a dividend. As it happens, Jiangsu Lettall ElectronicLtd's TSR for the last 3 years was 80%, which exceeds the share price return mentioned earlier. This is largely a result of its dividend payments!

A Different Perspective

Investors in Jiangsu Lettall ElectronicLtd had a tough year, with a total loss of 28% (including dividends), against a market gain of about 13%. 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 7%, 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. 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. Consider risks, for instance. Every company has them, and we've spotted 1 warning sign for Jiangsu Lettall ElectronicLtd you should know about.

If you like to buy stocks alongside management, then you might just love this free list of companies. (Hint: many of them are unnoticed AND have attractive valuation).

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.