Skip to main content
market.news — Markets without borders
Valuation

PEG Ratio

P/E ratio divided by earnings growth rate — adjusts P/E for growth.

In depth

PEG below 1.0 traditionally suggests undervaluation; above 1.5 suggests rich valuation. The metric, popularized by Peter Lynch, addresses the limitation that high-growth companies "deserve" higher P/E ratios. Caveat: PEG is highly sensitive to growth-rate assumptions, which often prove optimistic.

Frequently asked about PEG Ratio

What is PEG Ratio?

P/E ratio divided by earnings growth rate — adjusts P/E for growth. PEG below 1.0 traditionally suggests undervaluation; above 1.5 suggests rich valuation. The metric, popularized by Peter Lynch, addresses the limitation that high-growth companies "deserve" higher P/E ratios. Caveat: PEG is highly sensitive to growth-rate assumptions, which often prove optimistic.

Why does PEG Ratio matter for investors?

In valuation, PEG Ratio is one of the building blocks investors use to compare opportunities and assess risk. Understanding it helps you read research notes, earnings reports, and market commentary without getting lost in jargon.

How is PEG Ratio used in practice?

PEG below 1.0 traditionally suggests undervaluation; above 1.5 suggests rich valuation. The metric, popularized by Peter Lynch, addresses the limitation that high-growth companies "deserve" higher P/E ratios.

Related terms

Looking for more financial terms?

Browse Full Glossary →