After announcing healthy earnings, Tianneng Battery Group Co., Ltd.'s (SHSE:688819) stock rose over the last week. Despite the strong profit numbers, we believe that there are some deeper issues which investors should look into.

Examining Cashflow Against Tianneng Battery Group'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. In plain english, this ratio subtracts FCF from net profit, and divides that number by the company's average operating assets over that period. This ratio tells us how much of a company's profit is not backed by free cashflow.

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. Notably, there is some academic evidence that suggests that a high accrual ratio is a bad sign for near-term profits, generally speaking.

For the year to December 2023, Tianneng Battery Group had an accrual ratio of 0.42. As a general rule, that bodes poorly for future profitability. And indeed, during the period the company didn't produce any free cash flow whatsoever. Over the last year it actually had negative free cash flow of CN¥606m, in contrast to the aforementioned profit of CN¥2.30b. Coming off the back of negative free cash flow last year, we imagine some shareholders might wonder if its cash burn of CN¥606m, this year, indicates high risk. 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.

The Impact Of Unusual Items On Profit

The fact that the company had unusual items boosting profit by CN¥447m, 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 crunched the numbers on thousands of publicly listed companies, we found that a boost from unusual items in a given year is often not repeated the next year. Which is hardly surprising, given the name. 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 Tianneng Battery Group's Profit Performance

Tianneng Battery Group had a weak accrual ratio, but its profit did receive a boost from unusual items. Considering all this we'd argue Tianneng Battery Group's profits probably give an overly generous impression of its sustainable level of profitability. So while earnings quality is important, it's equally important to consider the risks facing Tianneng Battery Group at this point in time. Be aware that Tianneng Battery Group is showing 2 warning signs in our investment analysis and 1 of those is potentially serious...

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 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.