Despite announcing strong earnings, ATI Inc.'s (NYSE:ATI) stock was sluggish. We think that the market might be paying attention to some underlying factors are concerning.

Zooming In On ATI's Earnings

As finance nerds would already know, the accrual ratio from cashflow is a key measure for assessing how well a company's free cash flow (FCF) matches its profit. The accrual ratio subtracts the FCF from the profit for a given period, and divides the result by the average operating assets of the company over that time. The ratio shows us how much a company's profit exceeds its FCF.

That means a negative accrual ratio is a good thing, because it shows that the company is bringing in more free cash flow than its profit would suggest. While having an accrual ratio above zero is of little concern, we do think it's worth noting when a company has a relatively high accrual ratio. That's because some academic studies have suggested that high accruals ratios tend to lead to lower profit or less profit growth.

For the year to December 2023, ATI had an accrual ratio of 0.20. We can therefore deduce that its free cash flow fell well short of covering its statutory profit. Even though it reported a profit of US$410.8m, a look at free cash flow indicates it actually burnt through US$115m in the last year. It's worth noting that ATI generated positive FCF of US$94m a year ago, so at least they've done it in the past. However, as we will discuss below, we can see that the company's accrual ratio has been impacted by its tax situation. This would certainly have contributed to the weak cash conversion.

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

In addition to the notable accrual ratio, we can see that ATI received a tax benefit of US$128m. This is meaningful because companies usually pay tax rather than receive tax benefits. The receipt of a tax benefit is obviously a good thing, on its own. However, our data indicates that tax benefits can temporarily boost statutory profit in the year it is booked, but subsequently profit may fall back. Assuming the tax benefit is not repeated every year, we could see its profitability drop noticeably, all else being equal.

Our Take On ATI's Profit Performance

This year, ATI couldn't match its profit with cashflow. On top of that, the unsustainable nature of tax benefits mean that there's a chance profit may be lower next year, certainly in the absence of strong growth. Considering all this we'd argue ATI's profits probably give an overly generous impression of its sustainable level of profitability. So if you'd like to dive deeper into this stock, it's crucial to consider any risks it's facing. Case in point: We've spotted 3 warning signs for ATI you should be aware of.

In this article we've looked at a number of factors that can impair the utility of profit numbers, and we've come away cautious. 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. While it might take a little research on your behalf, you may find this free collection of companies boasting high return on equity, or this list of stocks that insiders are buying to be useful.

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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.