Buying shares in the best businesses can build meaningful wealth for you and your family. And highest quality companies can see their share prices grow by huge amounts. Don't believe it? Then look at the Flat Glass Group Co., Ltd. (HKG:6865) share price. It's 454% higher than it was five years ago. And this is just one example of the epic gains achieved by some long term investors. And in the last week the share price has popped 8.2%.

On the back of a solid 7-day performance, let's check what role the company's fundamentals have played in driving long term shareholder 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 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.

Over half a decade, Flat Glass Group managed to grow its earnings per share at 38% a year. So the EPS growth rate is rather close to the annualized share price gain of 41% per year. This indicates that investor sentiment towards the company has not changed a great deal. Indeed, it would appear the share price is reacting to the EPS.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail).

It's probably worth noting we've seen significant insider buying in the last quarter, which we consider a positive. On the other hand, we think the revenue and earnings trends are much more meaningful measures of the business. It might be well worthwhile taking a look at our free report on Flat Glass Group's earnings, revenue and cash flow.

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 incorporates the value of any spin-offs or discounted capital raisings, along with any dividends, based on the assumption that the dividends are reinvested. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. As it happens, Flat Glass Group's TSR for the last 5 years was 492%, which exceeds the share price return mentioned earlier. And there's no prize for guessing that the dividend payments largely explain the divergence!

A Different Perspective

We regret to report that Flat Glass Group shareholders are down 27% for the year (even including dividends). Unfortunately, that's worse than the broader market decline of 13%. 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 43%, 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. Even so, be aware that Flat Glass Group is showing 2 warning signs in our investment analysis , and 1 of those shouldn't be ignored...

Flat Glass Group is not the only stock insiders are buying. So take a peek at this free list of growing companies with insider buying.

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