If you are building a properly diversified stock portfolio, the chances are some of your picks will perform badly. But long term YaGuang Technology Group Company Limited (SZSE:300123) shareholders have had a particularly rough ride in the last three year. Sadly for them, the share price is down 58% in that time. But it's up 5.8% in the last week.

While the stock has risen 5.8% in the past week but long term shareholders are still in the red, let's see what the fundamentals can tell us.

Check out our latest analysis for YaGuang Technology Group

Given that YaGuang Technology Group didn't make a profit in the last twelve months, we'll focus on revenue growth to form a quick view of its business development. Generally speaking, companies without profits are expected to grow revenue every year, and at a good clip. Some companies are willing to postpone profitability to grow revenue faster, but in that case one does expect good top-line growth.

Over the last three years, YaGuang Technology Group's revenue dropped 11% per year. That's not what investors generally want to see. The share price decline of 16% compound, over three years, is understandable given the company doesn't have profits to boast of, and revenue is moving in the wrong direction. Having said that, if growth is coming in the future, now may be the low ebb for the company. We don't generally like to own companies that lose money and can't grow revenues. But any company is worth looking at when it makes a maiden profit.

The graphic below depicts how earnings and revenue have changed over time (unveil the exact values by clicking on the image).

Balance sheet strength is crucial. It might be well worthwhile taking a look at our free report on how its financial position has changed over time.

A Different Perspective

It's nice to see that YaGuang Technology Group shareholders have received a total shareholder return of 34% over the last year. That's better than the annualised return of 9% over half a decade, implying that the company is doing better recently. In the best case scenario, this may hint at some real business momentum, implying that now could be a great time to delve deeper. 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 2 warning signs for YaGuang Technology Group 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.