SG Micro Corp (SZSE:300661) shareholders might be concerned after seeing the share price drop 19% in the last quarter. But that does not change the realty that the stock's performance has been terrific, over five years. Indeed, the share price is up a whopping 341% in that time. Arguably, the recent fall is to be expected after such a strong rise. Of course what matters most is whether the business can improve itself sustainably, thus justifying a higher price. While the long term returns are impressive, we do have some sympathy for those who bought more recently, given the 45% drop, in the last year.

While the stock has fallen 3.3% this week, it's worth focusing on the longer term and seeing if the stocks historical returns have been driven by the underlying fundamentals.

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. 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).

Over half a decade, SG Micro managed to grow its earnings per share at 19% a year. This EPS growth is lower than the 35% average annual increase in the share price. So it's fair to assume the market has a higher opinion of the business than it did five years ago. And that's hardly shocking given the track record of growth. This optimism is visible in its fairly high P/E ratio of 120.72.

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

Dive deeper into SG Micro's key metrics by checking this interactive graph of SG Micro's earnings, revenue and cash flow.

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. Arguably, the TSR gives a more comprehensive picture of the return generated by a stock. As it happens, SG Micro's TSR for the last 5 years was 346%, 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 17% in the twelve months, SG Micro shareholders did even worse, losing 45% (even including dividends). However, it could simply be that the share price has been impacted by broader market jitters. It might be worth keeping an eye on the fundamentals, in case there's a good opportunity. Longer term investors wouldn't be so upset, since they would have made 35%, 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. 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 SG Micro is showing 2 warning signs in our investment analysis , and 1 of those is significant...

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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.