Some say volatility, rather than debt, is the best way to think about risk as an investor, but Warren Buffett famously said that 'Volatility is far from synonymous with risk.' 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, Sigma Lithium Corporation (NASDAQ:SGML) does carry debt. But the real question is whether this debt is making the company risky.

When Is Debt Dangerous?

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. Ultimately, if the company can't fulfill its legal obligations to repay debt, shareholders could walk away with nothing. However, a more common (but still painful) scenario is that it has to raise new equity capital at a low price, thus permanently diluting shareholders. By replacing dilution, though, debt can be an extremely good tool for businesses that need capital to invest in growth at high rates of return. The first step when considering a company's debt levels is to consider its cash and debt together.

What Is Sigma Lithium's Debt?

The image below, which you can click on for greater detail, shows that at June 2024 Sigma Lithium had debt of CA$300.4m, up from CA$132.7m in one year. However, it also had CA$103.1m in cash, and so its net debt is CA$197.3m.

How Strong Is Sigma Lithium's Balance Sheet?

We can see from the most recent balance sheet that Sigma Lithium had liabilities of CA$222.5m falling due within a year, and liabilities of CA$166.4m due beyond that. On the other hand, it had cash of CA$103.1m and CA$101.8m worth of receivables due within a year. So its liabilities total CA$184.0m more than the combination of its cash and short-term receivables.

Since publicly traded Sigma Lithium shares are worth a total of CA$1.97b, 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.

In order to size up a company's debt relative to its earnings, we calculate its net debt divided by its earnings before interest, tax, depreciation, and amortization (EBITDA) and its earnings before interest and tax (EBIT) divided by its interest expense (its interest cover). 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).

Sigma Lithium has net debt worth 2.4 times EBITDA, which isn't too much, but its interest cover looks a bit on the low side, with EBIT at only 2.9 times the interest expense. While these numbers do not alarm us, it's worth noting that the cost of the company's debt is having a real impact. However, the silver lining was that Sigma Lithium achieved a positive EBIT of CA$65m in the last twelve months, an improvement on the prior year's loss. When analysing debt levels, the balance sheet is the obvious place to start. But it is future earnings, more than anything, that will determine Sigma Lithium's ability to maintain a healthy balance sheet going forward. So if you want to see what the professionals think, you might find this free report on analyst profit forecasts to be interesting.

But our final consideration is also important, because a company cannot pay debt with paper profits; it needs cold hard cash. So it's worth checking how much of the earnings before interest and tax (EBIT) is backed by free cash flow. During the last year, Sigma Lithium burned a lot of cash. While that may be a result of expenditure for growth, it does make the debt far more risky.

Our View

Sigma Lithium's struggle to convert EBIT to free cash flow had us second guessing its balance sheet strength, but the other data-points we considered were relatively redeeming. But on the bright side, its ability to to handle its total liabilities isn't too shabby at all. When we consider all the factors discussed, it seems to us that Sigma Lithium is taking some risks with its use of debt. So while that leverage does boost returns on equity, we wouldn't really want to see it increase from here. When analysing debt levels, the balance sheet is the obvious place to start. But ultimately, every company can contain risks that exist outside of the balance sheet. For example, we've discovered 2 warning signs for Sigma Lithium that you should be aware of before investing here.

When all is said and done, sometimes its easier to focus on companies that don't even need debt. Readers can access a list of growth stocks with zero net debt 100% free, right now.

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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.