Investors are often guided by the idea of discovering 'the next big thing', even if that means buying 'story stocks' without any revenue, let alone profit. Sometimes these stories can cloud the minds of investors, leading them to invest with their emotions rather than on the merit of good company fundamentals. Loss making companies can act like a sponge for capital - so investors should be cautious that they're not throwing good money after bad.

So if this idea of high risk and high reward doesn't suit, you might be more interested in profitable, growing companies, like JA Solar Technology (SZSE:002459). Now this is not to say that the company presents the best investment opportunity around, but profitability is a key component to success in business.

See our latest analysis for JA Solar Technology

How Fast Is JA Solar Technology Growing?

The market is a voting machine in the short term, but a weighing machine in the long term, so you'd expect share price to follow earnings per share (EPS) outcomes eventually. Therefore, there are plenty of investors who like to buy shares in companies that are growing EPS. JA Solar Technology's shareholders have have plenty to be happy about as their annual EPS growth for the last 3 years was 55%. Growth that fast may well be fleeting, but it should be more than enough to pique the interest of the wary stock pickers.

It's often helpful to take a look at earnings before interest and tax (EBIT) margins, as well as revenue growth, to get another take on the quality of the company's growth. JA Solar Technology shareholders can take confidence from the fact that EBIT margins are up from 8.6% to 13%, and revenue is growing. That's great to see, on both counts.

The chart below shows how the company's bottom and top lines have progressed over time. Click on the chart to see the exact numbers.

In investing, as in life, the future matters more than the past. So why not check out this free interactive visualization of JA Solar Technology's forecast profits?

Are JA Solar Technology Insiders Aligned With All Shareholders?

Since JA Solar Technology has a market capitalisation of CN¥76b, we wouldn't expect insiders to hold a large percentage of shares. But thanks to their investment in the company, it's pleasing to see that there are still incentives to align their actions with the shareholders. Indeed, they hold CN¥174m worth of its stock. This considerable investment should help drive long-term value in the business. Despite being just 0.2% of the company, the value of that investment is enough to show insiders have plenty riding on the venture.

Is JA Solar Technology Worth Keeping An Eye On?

JA Solar Technology's earnings per share growth have been climbing higher at an appreciable rate. That sort of growth is nothing short of eye-catching, and the large investment held by insiders should certainly brighten the view of the company. At times fast EPS growth is a sign the business has reached an inflection point, so there's a potential opportunity to be had here. So at the surface level, JA Solar Technology is worth putting on your watchlist; after all, shareholders do well when the market underestimates fast growing companies. Even so, be aware that JA Solar Technology is showing 2 warning signs in our investment analysis , and 1 of those is a bit concerning...

The beauty of investing is that you can invest in almost any company you want. But if you prefer to focus on stocks that have demonstrated insider buying, here is a list of companies with insider buying in the last three months.

Please note the insider transactions discussed in this article refer to reportable transactions in the relevant jurisdiction.

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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.