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Warren Buffett: How He Does It 3
1. Has the company consistently performed well?
Sometimes return on equity (ROE) is referred to as "stockholder's return on investment". It reveals the rate at which shareholders are earning income on their shares. Buffett always looks at ROE to see whether or not a company has consistently performed well in comparison to other companies in the same industry. ROE is calculated as follows:
= Net Income
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Shareholder's Equity
Looking at the ROE in just the last year isn't enough. The investor should view the ROE from the past five to 10 years to get a good idea of historical performance.
2. Has the company avoided excess debt?
The debt/equity ratio is another key characteristic Buffett considers carefully. Buffett prefers to see a small amount of debt so that earnings growth is being generated from shareholders' equity as opposed to borrowed money. The debt/equity ratio is calculated as follows:
= Total Liabilities
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Shareholders' Equity
This ratio shows the proportion of equity and debt the company is using to finance its assets, and the higher the ratio, the more debt - rather than equity - is financing the company. A high level of debt compared to equity can result in volatile earnings and large interest expenses. For a more stringent test, investors sometimes use only long-term debt instead of total liabilities in the calculation above.
3. Are profit margins high? Are they increasing?
The profitability of a company depends not only on having a good profit margin but also on consistently increasing this profit margin. This margin is calculated by dividing net income by net sales. To get a good indication of historical profit margins, investors should look back at least five years. A high profit margin indicates the company is executing its business well, but increasing margins means management has been extremely efficient and successful at controlling expenses.
4. How long has the company been public?
Buffett typically considers only companies that have been around for at least 10 years. As a result, most of the technology companies that have had their IPOs in the past decade wouldn't get on Buffett's radar (not to mention the fact that Buffett will invest only in a business that he fully understands, and he admittedly does not understand what a lot of today's technology companies actually do). It makes sense that one of Buffet's criteria is longevity: value investing means looking at companies that have stood the test of time but are currently undervalued.
Never underestimate the value of historical performance, which demonstrates the company's ability (or inability) to increase shareholder value. Do keep in mind, however, that the past performance of a stock does not guarantee future performance - the job of the value investor is to determine how well the company can perform as well as it did in the past. Determining this is inherently tricky, but evidently Buffett is very good at it.
5. Do the company's products rely on a commodity?
Initially you might think of this question as a radical approach to narrowing down a company. Buffett, however, sees this question as an important one. He tends to shy away (but not always) from companies whose products are indistinguishable from those of competitors, and those that rely solely on a commodity such as oil and gas. If the company does not offer anything different than another firm within the same industry, Buffett sees little that sets the company apart. Any characteristic that is hard to replicate is what Buffett calls a company's economic moat, or competitive advantage. The wider the moat, the tougher it is for a competitor to gain market share.
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