Like a puppy chasing its tail, some new investors often chase 'the next big thing', even if that means buying 'story stocks' without revenue, let alone profit. And in their study titled Who Falls Prey to the Wolf of Wall Street?' Leuz et. al. found that it is 'quite common' for investors to lose money by buying into 'pump and dump' schemes.

In the age of tech-stock blue-sky investing, my choice may seem old fashioned; I still prefer profitable companies like SPX (NYSE:SPXC). While that doesn't make the shares worth buying at any price, you can't deny that successful capitalism requires profit, eventually. Loss-making companies are always racing against time to reach financial sustainability, but time is often a friend of the profitable company, especially if it is growing.

View our latest analysis for SPX

SPX's Improving Profits

Over the last three years, SPX has grown earnings per share (EPS) like young bamboo after rain; fast, and from a low base. So I don't think the percent growth rate is particularly meaningful. As a result, I'll zoom in on growth over the last year, instead. Like a wedge-tailed eagle on the wind, SPX's EPS soared from US$1.84 to US$2.43, in just one year. That's a commendable gain of 32%.

I like to see top-line growth as an indication that growth is sustainable, and I look for a high earnings before interest and taxation (EBIT) margin to point to a competitive moat (though some companies with low margins also have moats). SPX reported flat revenue and EBIT margins over the last year. That's not bad, but it doesn't point to ongoing future growth, either.

In the chart below, you can see how the company has grown earnings, and revenue, over time. Click on the chart to see the exact numbers.

The trick, as an investor, is to find companies that are going to perform well in the future, not just in the past. To that end, right now and today, you can check our visualization of consensus analyst forecasts for future SPX EPS 100% free.

Are SPX Insiders Aligned With All Shareholders?

It makes me feel more secure owning shares in a company if insiders also own shares, thusly more closely aligning our interests. So it is good to see that SPX insiders have a significant amount of capital invested in the stock. With a whopping US$53m worth of shares as a group, insiders have plenty riding on the company's success. That's certainly enough to make me think that management will be very focussed on long term growth.

Does SPX Deserve A Spot On Your Watchlist?

For growth investors like me, SPX's raw rate of earnings growth is a beacon in the night. I think that EPS growth is something to boast of, and it doesn't surprise me that insiders are holding on to a considerable chunk of shares. So this is very likely the kind of business that I like to spend time researching, with a view to discerning its true value. What about risks? Every company has them, and we've spotted 2 warning signs for SPX you should know about.

Of course, you can do well (sometimes) buying stocks that are not growing earnings and do not have insiders buying shares. But as a growth investor I always like to check out companies that do have those features. You can access a free list of them here.

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

This article by Simply Wall St is general in nature. 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.

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