A lackluster earnings announcement from Zhejiang Lante Optics Co., Ltd. (SHSE:688127) last week didn't sink the stock price. We think that investors are worried about some weaknesses underlying the earnings.

See our latest analysis for Zhejiang Lante Optics

Zooming In On Zhejiang Lante Optics' Earnings

In high finance, the key ratio used to measure how well a company converts reported profits into free cash flow (FCF) is the accrual ratio (from cashflow). To get the accrual ratio we first subtract FCF from profit for a period, and then divide that number by the average operating assets for the period. This ratio tells us how much of a company's profit is not backed by free cashflow.

As a result, a negative accrual ratio is a positive for the company, and a positive accrual ratio is a negative. 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. To quote a 2014 paper by Lewellen and Resutek, "firms with higher accruals tend to be less profitable in the future".

For the year to March 2022, Zhejiang Lante Optics had an accrual ratio of 0.22. Unfortunately, that means its free cash flow fell significantly short of its reported profits. Even though it reported a profit of CN¥123.2m, a look at free cash flow indicates it actually burnt through CN¥16m in the last year. We saw that FCF was CN¥164m a year ago though, so Zhejiang Lante Optics has at least been able to generate positive FCF in the past. However, that's not all there is to consider. We can see that unusual items have impacted its statutory profit, and therefore the accrual ratio.

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.

How Do Unusual Items Influence Profit?

The fact that the company had unusual items boosting profit by CN¥15m, in the last year, probably goes some way to explain why its accrual ratio was so weak. While we like to see profit increases, we tend to be a little more cautious when unusual items have made a big contribution. When we analysed the vast majority of listed companies worldwide, we found that significant unusual items are often not repeated. 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).

Our Take On Zhejiang Lante Optics' Profit Performance

Summing up, Zhejiang Lante Optics received a nice boost to profit from unusual items, but could not match its paper profit with free cash flow. Considering all this we'd argue Zhejiang Lante Optics' profits probably give an overly generous impression of its sustainable level of profitability. With this in mind, we wouldn't consider investing in a stock unless we had a thorough understanding of the risks. When we did our research, we found 3 warning signs for Zhejiang Lante Optics (1 is a bit unpleasant!) 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, and we've come away cautious. But there are plenty of other ways to inform your opinion of a company. 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.