The excitement of investing in a company that can reverse its fortunes is a big draw for some speculators, so even companies that have no revenue, no profit, and a record of falling short, can manage to find investors. 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. A loss-making company is yet to prove itself with profit, and eventually the inflow of external capital may dry up.

So if this idea of high risk and high reward doesn't suit, you might be more interested in profitable, growing companies, like National Australia Bank (ASX:NAB). While profit isn't the sole metric that should be considered when investing, it's worth recognising businesses that can consistently produce it.

View our latest analysis for National Australia Bank

How Fast Is National Australia Bank Growing?

Generally, companies experiencing growth in earnings per share (EPS) should see similar trends in share price. That means EPS growth is considered a real positive by most successful long-term investors. Shareholders will be happy to know that National Australia Bank's EPS has grown 29% each year, compound, over three years. If the company can sustain that sort of growth, we'd expect shareholders to come away satisfied.

One way to double-check a company's growth is to look at how its revenue, and earnings before interest and tax (EBIT) margins are changing. Not all of National Australia Bank's revenue this year is revenue from operations, so keep in mind the revenue and margin numbers used in this article might not be the best representation of the underlying business. While we note National Australia Bank achieved similar EBIT margins to last year, revenue grew by a solid 7.5% to AU$20b. That's encouraging news for the company!

The chart below shows how the company's bottom and top lines have progressed over time. To see the actual numbers, click on the chart.

 earnings-and-revenue-history

You don't drive with your eyes on the rear-view mirror, so you might be more interested in this freereport showing analyst forecasts for National Australia Bank's future profits.

Are National Australia Bank Insiders Aligned With All Shareholders?

It's said that there's no smoke without fire. For investors, insider buying is often the smoke that indicates which stocks could set the market alight. That's because insider buying often indicates that those closest to the company have confidence that the share price will perform well. Of course, we can never be sure what insiders are thinking, we can only judge their actions.

We note that National Australia Bank insiders spent AU$149k on stock, over the last year; in contrast, we didn't see any selling. That's nice to see, because it suggests insiders are optimistic.

The good news, alongside the insider buying, for National Australia Bank bulls is that insiders (collectively) have a meaningful investment in the stock. Indeed, they hold AU$33m worth of its stock. That's a lot of money, and no small incentive to work hard. Even though that's only about 0.03% of the company, it's enough money to indicate alignment between the leaders of the business and ordinary shareholders.

Should You Add National Australia Bank To Your Watchlist?

For growth investors, National Australia Bank's raw rate of earnings growth is a beacon in the night. Furthermore, company insiders have been adding to their significant stake in the company. Astute investors will want to keep this stock on watch. Before you take the next step you should know about the 1 warning sign for National Australia Bank that we have uncovered.

There are plenty of other companies that have insiders buying up shares. So if you like the sound of National Australia Bank, you'll probably love this curated collection of companies in AU that have witnessed growth alongside insider buying in the last three months.

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

Have feedback on this article? Concerned about the content?Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.

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.