The market shrugged off GATX Corporation's (NYSE:GATX) solid earnings report. Our analysis showed that there are some concerning factors in the earnings that investors may be cautious of.

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Importantly, our data indicates that GATX's profit received a boost of US$125m in unusual items, over the last year. While we like to see profit increases, we tend to be a little more cautious when unusual items have made a big contribution. We ran the numbers on most publicly listed companies worldwide, and it's very common for unusual items to be once-off in nature. And that's as you'd expect, given these boosts are described as 'unusual'. If GATX doesn't see that contribution repeat, then all else being equal we'd expect its profit to drop over the current year.

That might leave you wondering what analysts are forecasting in terms of future profitability. Luckily, you can click here to see an interactive graph depicting future profitability, based on their estimates.

We'd posit that GATX's statutory earnings aren't a clean read on ongoing productivity, due to the large unusual item. Therefore, it seems possible to us that GATX's true underlying earnings power is actually less than its statutory profit. But on the bright side, its earnings per share have grown at an extremely impressive rate over the last three years. Of course, we've only just scratched the surface when it comes to analysing its earnings; one could also consider margins, forecast growth, and return on investment, among other factors. So while earnings quality is important, it's equally important to consider the risks facing GATX at this point in time. For instance, we've identified 3 warning signs for GATX (1 makes us a bit uncomfortable) you should be familiar with.

Today we've zoomed in on a single data point to better understand the nature of GATX's profit. But there is always more to discover if you are capable of focussing your mind on minutiae. Some people consider a high return on equity to be a good sign of a quality business. So you may wish to see this free collection of companies boasting high return on equity, or this list of stocks with high insider ownership.

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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.