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.