McKesson Corporation's (NYSE:MCK) healthy profit numbers didn't contain any surprises for investors. However the statutory profit number doesn't tell the whole story, and we have found some factors which might be of concern to shareholders.

How Do Unusual Items Influence Profit?

Importantly, our data indicates that McKesson's profit received a boost of US$299m in unusual items, over the last year. While it's always nice to have higher profit, a large contribution from unusual items sometimes dampens our enthusiasm. 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'. Assuming those unusual items don't show up again in the current year, we'd thus expect profit to be weaker next year (in the absence of business growth, that is).

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.

Our Take On McKesson's Profit Performance

We'd posit that McKesson's statutory earnings aren't a clean read on ongoing productivity, due to the large unusual item. Therefore, it seems possible to us that McKesson's true underlying earnings power is actually less than its statutory profit. The good news is that its earnings per share increased slightly in the last year. The goal of this article has been to assess how well we can rely on the statutory earnings to reflect the company's potential, but there is plenty more to consider. With this in mind, we wouldn't consider investing in a stock unless we had a thorough understanding of the risks. In terms of investment risks, we've identified 1 warning sign with McKesson, and understanding this should be part of your investment process.

This note has only looked at a single factor that sheds light on the nature of McKesson's profit. But there is always more to discover if you are capable of focussing your mind on minutiae. For example, many people consider a high return on equity as an indication of favorable business economics, while others like to 'follow the money' and search out stocks that insiders are buying. 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.