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 might be obvious that you need to consider debt, when you think about how risky any given stock is, because too much debt can sink a company. Importantly, Iridium Communications Inc. (NASDAQ:IRDM) does carry debt. But should shareholders be worried about its use of debt?

When Is Debt Dangerous?

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. Part and parcel of capitalism is the process of 'creative destruction' where failed businesses are mercilessly liquidated by their bankers. While that is not too common, we often do see indebted companies permanently diluting shareholders because lenders force them to raise capital at a distressed price. Of course, the upside of debt is that it often represents cheap capital, especially when it replaces dilution in a company with the ability to reinvest at high rates of return. When we examine debt levels, we first consider both cash and debt levels, together.

What Is Iridium Communications's Debt?

As you can see below, at the end of September 2024, Iridium Communications had US$1.79b of debt, up from US$1.48b a year ago. Click the image for more detail. However, because it has a cash reserve of US$159.6m, its net debt is less, at about US$1.64b.

How Strong Is Iridium Communications' Balance Sheet?

Zooming in on the latest balance sheet data, we can see that Iridium Communications had liabilities of US$135.3m due within 12 months and liabilities of US$1.95b due beyond that. Offsetting these obligations, it had cash of US$159.6m as well as receivables valued at US$96.5m due within 12 months. So its liabilities total US$1.83b more than the combination of its cash and short-term receivables.

Iridium Communications has a market capitalization of US$3.39b, so it could very likely raise cash to ameliorate its balance sheet, if the need arose. But it's clear that we should definitely closely examine whether it can manage its debt without dilution.

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 Iridium Communications's net debt to EBITDA ratio of 4.1, we think its super-low interest cover of 2.2 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. So shareholders should probably be aware that interest expenses appear to have really impacted the business lately. The silver lining is that Iridium Communications grew its EBIT by 115% last year, which nourishing like the idealism of youth. If that earnings trend continues it will make its debt load much more manageable in the future. 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 Iridium Communications'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.

Finally, a company can only pay off debt with cold hard cash, not accounting profits. So the logical step is to look at the proportion of that EBIT that is matched by actual free cash flow. Over the last three years, Iridium Communications 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

Iridium Communications's conversion of EBIT to free cash flow was a real positive on this analysis, as was its EBIT growth rate. In contrast, our confidence was undermined by its apparent struggle to cover its interest expense with its EBIT. Considering this range of data points, we think Iridium Communications is in a good position to manage its debt levels. But a word of caution: we think debt levels are high enough to justify ongoing monitoring. There's no doubt that we learn most about debt from the balance sheet. But ultimately, every company can contain risks that exist outside of the balance sheet. Case in point: We've spotted 2 warning signs for Iridium Communications you should be aware of, and 1 of them is a bit concerning.

If, after all that, you're more interested in a fast growing company with a rock-solid balance sheet, then check out our list of net cash growth stocks without delay.

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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.