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The Coca-Cola Company (KO), USA Mobility Inc (USMO) – Price-to-Earnings Ratio: An Alternative View

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When you use price-to-earnings multiples to assess a company’s valuation, you are hoping that one-year annual earnings are a good proxy for a stock value based on the entire set of all future discounted earnings flow. Hence, if one-year earnings are not representative of many future earnings, the P/E ratio is most likely not a great measure of value.

One way to think of the P/E multiple is that it attaches an implicit overall value to each dollar of earnings. At a P/E ratio of 10, you may say that each extra dollar of earnings translates into an extra $10 worth of valuation. Here I want to propose an alternative way to use the ratio which might help you assess whether a company is undervalued or overvalued.

The Coca-Cola Company (NYSE:KO)

An alternative way to use the P/E ratio

Indirectly, the P/E ratio refers to a firm’s cost of capital, operating margin and top-line growth rate. Investment bankers use a simple perpetuity formula:

Price = Earnings/(Cost of Capital – Earnings Growth)

Rearranging the terms we get:

Price/Earnings = 1/(Cost of Capital- Earnings Growth)


Cost of Capital = Earnings/Price + Earnings Growth

Since we know price, earnings and expected earnings growth, we can infer the firm’s cost of capital (which is always higher than the cost of debt). If the implied cost of capital of the formula above seems too high for the company’s risk profile, then the company would be undervalued. On the contrary, if the cost of capital is overly low, the the company could be overvalued. Of course, the limitations of the P/E ratio remain in place. You should not use the ratio for companies that are highly unpredictable.

Valuation looks fair for Buffett’s favorite company

Consumer goods companies such as The Coca-Cola Company (NYSE:KO) – which trades at 19 times earnings – have margins that are more or less predictable and their top-line growth is more or less capped by the world’s GDP growth (which is the maximum growth rate any firm could achieve in the long term). In The Coca-Cola Company (NYSE:KO)’s case, the formula tells us that the company is fairly valued.

We know The Coca-Cola Company (NYSE:KO)’s price ($40) and we know the company earns $2.15 per share a year. Besides, we could also estimate its earnings growth at 3% year over year because the world’s population can grow at that rate. With those figures in hand, we can infer that the market estimates Coca Cola’s cost of capital at 8.4%. A cost of capital above 8% for a company with the strongest business motto in the world seems more than fair. At the very least, The Coca-Cola Company (NYSE:KO) looks fairly priced.

This shrinking business does not look cheap anymore

Some companies are dying at a more or less predictable rate. Using the P/E multiple to value companies such as USA Mobility Inc (NASDAQ:USMO) , which trades at a P/E multiple of 12 times and loses sales steadily at a 7% annual rate, is also fair.

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