How to use net debt in your analysis
To be perfectly clear, there's no perfect answer to "What should a company's net debt be?" There are plenty of variables that should be considered. For one thing, it's important to realize that different industries tend to have different debt levels that are considered comfortable. As an example, many investors want to see technology companies have low or even negative net debt levels, while businesses in the real estate sector often comfortably carry net debt levels of half of their market cap or more.
Different businesses also have different maturity levels and credit risk ratings, and this should certainly play a role in your debt analysis. After all, $1 billion in debt at an average interest rate of 3% and $1 billion in debt at 8% interest are two very different things.
The key takeaway from these two caveats is that net debt is usually most useful for comparing companies with their peers. For example, comparing the net debt levels of Home Depot (HD -1.15%) and Lowe's (LOW +0.22%) could be very useful. A comparison of net debt between Home Depot and Nvidia (NVDA -1.29%) probably wouldn't give you much usable insight.
Even when comparing similar companies, net debt as a raw number usually isn't nearly as useful as debt ratios, which give more of an apples-to-apples comparison between two companies. The net debt-to-earnings before interest, taxes, depreciation, and amortization (EBITDA) ratio can help you compare the liquidity of two similar businesses, and tracking a company's net debt-to-EBITDA ratio over time can help you determine if its balance sheet is getting stronger over time.
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