Is National Grid (LON:NG.) A Risky Investment?

Warren Buffett famously said, 'Volatility is far from synonymous with risk.' 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. Importantly, National Grid plc (LON:NG.) 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. Ultimately, if the company can't fulfill its legal obligations to repay debt, shareholders could walk away with nothing. 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. Having said that, the most common situation is where a company manages its debt reasonably well - and to its own advantage. The first step when considering a company's debt levels is to consider its cash and debt together.

Our analysis indicates that NG. is potentially undervalued!

What Is National Grid's Net Debt?

The image below, which you can click on for greater detail, shows that at September 2022 National Grid had debt of UK£48.6b, up from UK£44.0b in one year. However, it also had UK£2.95b in cash, and so its net debt is UK£45.6b.

A Look At National Grid's Liabilities

The latest balance sheet data shows that National Grid had liabilities of UK£20.2b due within a year, and liabilities of UK£54.4b falling due after that. Offsetting this, it had UK£2.95b in cash and UK£3.81b in receivables that were due within 12 months. So it has liabilities totalling UK£67.9b more than its cash and near-term receivables, combined.

This deficit casts a shadow over the UK£37.3b company, like a colossus towering over mere mortals. So we'd watch its balance sheet closely, without a doubt. After all, National Grid would likely require a major re-capitalisation if it had to pay its creditors today.

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).

With a net debt to EBITDA ratio of 7.4, it's fair to say National Grid does have a significant amount of debt. But the good news is that it boasts fairly comforting interest cover of 3.5 times, suggesting it can responsibly service its obligations. The good news is that National Grid grew its EBIT a smooth 69% over the last twelve months. Like the milk of human kindness that sort of growth increases resilience, making the company more capable of managing 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 National Grid'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, while the tax-man may adore accounting profits, lenders only accept cold hard cash. So it's worth checking how much of that EBIT is backed by free cash flow. Over the last three years, National Grid recorded negative free cash flow, in total. Debt is usually more expensive, and almost always more risky in the hands of a company with negative free cash flow. Shareholders ought to hope for an improvement.

Our View

To be frank both National Grid's net debt to EBITDA and its track record of staying on top of its total liabilities make us rather uncomfortable with its debt levels. But on the bright side, its EBIT growth rate is a good sign, and makes us more optimistic. It's also worth noting that National Grid is in the Integrated Utilities industry, which is often considered to be quite defensive. We're quite clear that we consider National Grid to be really rather risky, as a result of its balance sheet health. So we're almost as wary of this stock as a hungry kitten is about falling into its owner's fish pond: once bitten, twice shy, as they say. The balance sheet is clearly the area to focus on when you are analysing debt. However, not all investment risk resides within the balance sheet - far from it. Be aware that National Grid is showing 2 warning signs in our investment analysis , and 1 of those is a bit unpleasant...

If you're interested in investing in businesses that can grow profits without the burden of debt, then check out this free list of growing businesses that have net cash on the balance sheet.

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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.