Unless you borrow money to invest, the potential losses are limited. But if you pick the right business to buy shares in, you can make more than you can lose. For example, the Yangtze Optical Fibre And Cable Joint Stock Limited Company (HKG:6869) share price has soared 152% return in just a single year. On top of that, the share price is up 57% in about a quarter. Also impressive, the stock is up 55% over three years, making long term shareholders happy, too.

Since the stock has added HK$903m to its market cap in the past week alone, let's see if underlying performance has been driving long-term returns.

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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 imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

Over the last twelve months, Yangtze Optical Fibre And Cable Limited actually shrank its EPS by 32%.

Given the share price gain, we doubt the market is measuring progress with EPS. Indeed, when EPS is declining but the share price is up, it often means the market is considering other factors.

We are skeptical of the suggestion that the 1.4% dividend yield would entice buyers to the stock. Revenue was pretty flat year on year, but maybe a closer look at the data can explain the market optimism.

You can see how earnings and revenue have changed over time in the image below (click on the chart to see the exact values).

If you are thinking of buying or selling Yangtze Optical Fibre And Cable Limited stock, you should check out this FREE detailed report on its balance sheet.

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 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, Yangtze Optical Fibre And Cable Limited's TSR for the last 1 year was 156%, which exceeds the share price return mentioned earlier. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

It's nice to see that Yangtze Optical Fibre And Cable Limited shareholders have received a total shareholder return of 156% over the last year. That's including the dividend. That's better than the annualised return of 12% over half a decade, implying that the company is doing better recently. Given the share price momentum remains strong, it might be worth taking a closer look at the stock, lest you miss an opportunity. 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. Consider for instance, the ever-present spectre of investment risk. We've identified 1 warning sign with Yangtze Optical Fibre And Cable Limited , and understanding them should be part of your investment process.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of companies we expect will grow earnings.

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

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.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.