Advantages of the PEG Ratio in Stock Valuation

The advantages of the PEG ration in stock valuation are concentrated around the ratio’s ability to be applied across industries. The PEG ratio is the relationship between the price-to-earnings ratio (P/E) and the companies projected growth rate. The P/E ratio is commonly used to value stocks because it represents how much an investor is paying for each dollar of earnings that the company generates.


The problem with this ratio is that it is based on what the company has earned in the past and it is hard to apply across industries. For example, what a utility company earns is not comparable to what a technology company earns.

What it Does

Advocates of the PEG ratio normalize the P/E ratio for different growth projections. Essentially, the PEG ratio measures how much an investor is paying for each percentage of growth. This important because it is a forward-looking methodology for comparing companies across industries.

A utility company with stable earnings, but low growth can be compared to a technology company that has lower earnings, but higher growth expectations. The drawback of the PEG ratio is that it ceases to work in cases of zero or negative growth environments. In these cases, other methods should be used. In all cases, you should consider multiple metrics before deploying capital.

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