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.' It's only natural to consider a company's balance sheet when you examine how risky it is, since debt is often involved when a business collapses. We note that Sinopec Oilfield Service Corporation (HKG:1033) does have debt on its balance sheet. But should shareholders be worried about its use of debt?

Why Does Debt Bring Risk?

Debt is a tool to help businesses grow, but if a business is incapable of paying off its lenders, then it exists at their mercy. If things get really bad, the lenders can take control of the business. 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. Of course, plenty of companies use debt to fund growth, without any negative consequences. The first thing to do when considering how much debt a business uses is to look at its cash and debt together.

View our latest analysis for Sinopec Oilfield Service

What Is Sinopec Oilfield Service's Net Debt?

The chart below, which you can click on for greater detail, shows that Sinopec Oilfield Service had CN¥20.0b in debt in March 2022; about the same as the year before. However, it also had CN¥1.72b in cash, and so its net debt is CN¥18.3b.

A Look At Sinopec Oilfield Service's Liabilities

The latest balance sheet data shows that Sinopec Oilfield Service had liabilities of CN¥55.2b due within a year, and liabilities of CN¥2.27b falling due after that. On the other hand, it had cash of CN¥1.72b and CN¥27.3b worth of receivables due within a year. So it has liabilities totalling CN¥28.4b more than its cash and near-term receivables, combined.

This deficit is considerable relative to its market capitalization of CN¥28.8b, so it does suggest shareholders should keep an eye on Sinopec Oilfield Service's use of debt. This suggests shareholders would be heavily diluted if the company needed to shore up its balance sheet in a hurry.

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). The advantage of this approach is that we take into account both the absolute quantum of debt (with net debt to EBITDA) and the actual interest expenses associated with that debt (with its interest cover ratio).

While we wouldn't worry about Sinopec Oilfield Service's net debt to EBITDA ratio of 4.6, we think its super-low interest cover of 1.4 times is a sign of high leverage. In large part that's due to the company's significant depreciation and amortisation charges, which arguably mean its EBITDA is a very generous measure of earnings, and its debt may be more of a burden than it first appears. It seems clear that the cost of borrowing money is negatively impacting returns for shareholders, of late. Worse, Sinopec Oilfield Service's EBIT was down 33% over the last year. If earnings keep going like that over the long term, it has a snowball's chance in hell of paying off that debt. There's no doubt that we learn most about debt from the balance sheet. But it is future earnings, more than anything, that will determine Sinopec Oilfield Service's ability to maintain a healthy balance sheet going forward. So if you're focused on the future you can check out this free report showing analyst profit forecasts.

But our final consideration is also important, because a company cannot pay debt with paper profits; it needs cold hard cash. So we clearly need to look at whether that EBIT is leading to corresponding free cash flow. Over the last three years, Sinopec Oilfield Service actually produced more free cash flow than EBIT. That sort of strong cash conversion gets us as excited as the crowd when the beat drops at a Daft Punk concert.

Our View

To be frank both Sinopec Oilfield Service's interest cover and its track record of (not) growing its EBIT make us rather uncomfortable with its debt levels. But at least it's pretty decent at converting EBIT to free cash flow; that's encouraging. Looking at the bigger picture, it seems clear to us that Sinopec Oilfield Service's use of debt is creating risks for the company. If everything goes well that may pay off but the downside of this debt is a greater risk of permanent losses. There's no doubt that we learn most about debt from the balance sheet. However, not all investment risk resides within the balance sheet - far from it. To that end, you should learn about the 3 warning signs we've spotted with Sinopec Oilfield Service (including 1 which doesn't sit too well with us) .

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.