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Expert opinion from Guinness Global Investors features in a variety of media.

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Expert opinion from Guinness Global Investors features in a variety of media.

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Read our latest guides taking you through the key concepts in asset management. 

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23/02/2026

Price/Earnings-to-Growth (PEG) Ratio: Formula & Misconceptions

The PEG ratio is a widely used valuation tool that helps investors assess whether a company’s share price appropriately reflects its expected earnings growth. By adjusting the traditional P/E ratio for growth, it aims to offer a more nuanced perspective on value, particularly when comparing companies with different growth profiles. This guide introduces the PEG ratio, the key variations investors use, and the strengths and limitations to keep in mind when applying it in practice.

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