The external fund manager backed by Berkshire Hathaway's Charlie Munger, Li Lu, makes no bones about it when he says 'The biggest investment risk is not the volatility of prices, but whether you will suffer a permanent loss of capital.' So it seems the smart money knows that debt - which is usually involved in bankruptcies - is a very important factor, when you assess how risky a company is. Importantly, Union Optech Co.,Ltd. (SZSE:300691) does carry debt. But the real question is whether this debt is making the company risky.

When Is Debt A Problem?

Generally speaking, debt only becomes a real problem when a company can't easily pay it off, either by raising capital or with its own cash flow. Part and parcel of capitalism is the process of 'creative destruction' where failed businesses are mercilessly liquidated by their bankers. However, a more usual (but still expensive) situation is where a company must dilute shareholders at a cheap share price simply to get debt under control. Having said that, the most common situation is where a company manages its debt reasonably well - and to its own advantage. When we think about a company's use of debt, we first look at cash and debt together.

How Much Debt Does Union OptechLtd Carry?

As you can see below, at the end of September 2024, Union OptechLtd had CN¥582.8m of debt, up from CN¥452.7m a year ago. Click the image for more detail. However, because it has a cash reserve of CN¥405.3m, its net debt is less, at about CN¥177.4m.

How Healthy Is Union OptechLtd's Balance Sheet?

The latest balance sheet data shows that Union OptechLtd had liabilities of CN¥857.9m due within a year, and liabilities of CN¥347.1m falling due after that. Offsetting this, it had CN¥405.3m in cash and CN¥529.6m in receivables that were due within 12 months. So its liabilities outweigh the sum of its cash and (near-term) receivables by CN¥270.0m.

Since publicly traded Union OptechLtd shares are worth a total of CN¥5.56b, it seems unlikely that this level of liabilities would be a major threat. However, we do think it is worth keeping an eye on its balance sheet strength, as it may change over time.

We use two main ratios to inform us about debt levels relative to earnings. The first is net debt divided by earnings before interest, tax, depreciation, and amortization (EBITDA), while the second is how many times its earnings before interest and tax (EBIT) covers its interest expense (or its interest cover, for short). This way, we consider both the absolute quantum of the debt, as well as the interest rates paid on it.

We'd say that Union OptechLtd's moderate net debt to EBITDA ratio ( being 1.8), indicates prudence when it comes to debt. And its commanding EBIT of 1k times its interest expense, implies the debt load is as light as a peacock feather. Shareholders should be aware that Union OptechLtd's EBIT was down 29% last year. If that earnings trend continues then paying off its debt will be about as easy as herding cats on to a roller coaster. There's no doubt that we learn most about debt from the balance sheet. But it is Union OptechLtd's earnings that will influence how the balance sheet holds up in the future. So if you're keen to discover more about its earnings, it might be worth checking out this graph of its long term earnings trend.

Finally, a business needs free cash flow to pay off debt; accounting profits just don't cut it. So it's worth checking how much of that EBIT is backed by free cash flow. During the last three years, Union OptechLtd burned a lot of cash. While investors are no doubt expecting a reversal of that situation in due course, it clearly does mean its use of debt is more risky.

Our View

Union OptechLtd's EBIT growth rate and conversion of EBIT to free cash flow definitely weigh on it, in our esteem. But its interest cover tells a very different story, and suggests some resilience. Taking the abovementioned factors together we do think Union OptechLtd's debt poses some risks to the business. So while that leverage does boost returns on equity, we wouldn't really want to see it increase from here. The balance sheet is clearly the area to focus on when you are analysing debt. But ultimately, every company can contain risks that exist outside of the balance sheet. Be aware that Union OptechLtd is showing 4 warning signs in our investment analysis , and 2 of those are potentially serious...

Of course, if you're the type of investor who prefers buying stocks without the burden of debt, then don't hesitate to discover our exclusive list of net cash growth stocks, today.

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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.