Aptiv PLC's (NYSE:APTV) stock was strong after they recently reported robust earnings. However, we think that shareholders may be missing some concerning details in the numbers.

The Impact Of Unusual Items On Profit

To properly understand Aptiv's profit results, we need to consider the US$359m expense attributed to unusual items. It's never great to see unusual items costing the company profits, but on the upside, things might improve sooner rather than later. We looked at thousands of listed companies and found that unusual items are very often one-off in nature. And, after all, that's exactly what the accounting terminology implies. Assuming those unusual expenses don't come up again, we'd therefore expect Aptiv to produce a higher profit next year, all else being equal.

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.

An Unusual Tax Situation

Having already discussed the impact of the unusual items, we should also note that Aptiv received a tax benefit of US$1.9b. This is meaningful because companies usually pay tax rather than receive tax benefits. We're sure the company was pleased with its tax benefit. However, the devil in the detail is that these kind of benefits only impact in the year they are booked, and are often one-off in nature. In the likely event the tax benefit is not repeated, we'd expect to see its statutory profit levels drop, at least in the absence of strong growth.

Our Take On Aptiv's Profit Performance

In the last year Aptiv received a tax benefit, which boosted its profit in a way that might not be much more sustainable than turning prime farmland into gas fields. Having said that, it also had a unusual item reducing its profit. Based on these factors, we think it's very unlikely that Aptiv's statutory profits make it seem much weaker than it is. Keep in mind, when it comes to analysing a stock it's worth noting the risks involved. When we did our research, we found 3 warning signs for Aptiv (1 is a bit concerning!) that we believe deserve your full attention.

In this article we've looked at a number of factors that can impair the utility of profit numbers, as a guide to a business. But there are plenty of other ways to inform your opinion of a company. 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 that insiders are buying.

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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.