PEG Ratio (Price/Earnings to Growth)

PEGprice earnings growth ratioPEG ratio

The PEG ratio divides a stock's P/E ratio by its expected earnings growth rate, providing a growth-adjusted valuation metric where a PEG below 1.0 may indicate undervaluation.

Current Macro RegimeSTAGFLATION→ STABLE

The macro regime is STAGFLATION STABLE — growth decelerating (GDPNow 1.3%, consumer sentiment 56.6, housing deeply contractionary) while inflation is sticky-to-rising (Cleveland Fed CPI Nowcast 5.28%, PCE Nowcast 4.58%, GSCPI elevated). The bear steepening yield curve (30Y +10bp, 10Y +7bp 1M) with r…

Analysis from Apr 18, 2026

What Is the PEG Ratio?

The PEG ratio (Price/Earnings to Growth) is a valuation metric that adjusts the P/E ratio for the company's expected earnings growth rate. It was popularized by Peter Lynch in "One Up On Wall Street" and provides a simple way to assess whether a stock's valuation is justified by its growth prospects.

The formula is: PEG = P/E Ratio / Expected Annual EPS Growth Rate (%)

A PEG of 1.0 is considered the benchmark: the stock's P/E equals its growth rate, suggesting the market is paying a fair price for the growth being delivered.

Why PEG Matters

The PEG ratio solves a fundamental problem with the P/E ratio. A stock trading at 40x earnings looks expensive in isolation. But if that company is growing earnings at 40% annually, the 40x P/E represents fair value according to the PEG framework. Conversely, a stock at 12x earnings looks cheap until you realize earnings are growing at just 3% (PEG of 4.0).

PEG allows direct comparison across growth rates:

Stock	P/E	Growth Rate	PEG	Assessment
A	40x	35%	1.14	Fairly valued
B	20x	10%	2.00	Premium valuation
C	15x	25%	0.60	Potentially undervalued
D	50x	15%	3.33	Expensive relative to growth

Stock C has the lowest PEG despite not having the lowest P/E, making it the most attractive on a growth-adjusted basis.

PEG Limitations and Best Practices

Use PEG as a screening and comparison tool, not as a standalone decision metric:

Growth sustainability: PEG is only as reliable as the growth estimate. Use conservative growth assumptions and verify with multiple sources. A 3-year forward estimate is more reliable than a 5-year estimate
Quality of growth: Not all growth is equal. Revenue-driven growth is higher quality than buyback-driven EPS growth. Organic growth is more sustainable than acquisition-driven growth
Margin of safety: Target PEG ratios below 0.75-0.80 rather than below 1.0 to provide a buffer against growth disappointments
Sector context: PEG norms vary by sector. Technology companies often trade at higher PEGs because the market assigns higher confidence to their growth. Cyclical companies may show misleadingly low PEGs at cycle peaks
Not for value stocks: PEG is designed for growth stocks. Applying it to mature, low-growth companies produces extreme values that are not informative

Related Analysis

GeopoliticsPacific Missile Redeployment: Washington Just Told Asia It's in a Two-Front BindApr 7, 2026

Frequently Asked Questions

▶How is the PEG ratio calculated?

The PEG ratio is calculated as `P/E Ratio / Annual EPS Growth Rate`. If a stock has a P/E of 25 and expected earnings growth of 20% per year, the PEG is 1.25 (25 / 20). The growth rate used is typically the expected forward earnings growth rate over the next 3-5 years, sourced from analyst consensus estimates. Some investors use historical earnings growth or revenue growth as alternatives. A PEG of 1.0 is considered "fair" (you are paying proportionally for growth). Below 1.0 suggests the stock may be cheap relative to its growth. Above 2.0 suggests the growth premium is excessive.

▶Is a PEG below 1.0 always a good buy?

Not necessarily. The PEG ratio has limitations. It relies on earnings growth estimates, which may be wrong. A company with a PEG of 0.8 based on 25% expected growth is only cheap if that 25% growth actually materializes. If growth disappoints (dropping to 10%), the effective PEG is 2.0. PEG also works poorly for companies with very low growth rates (dividing by near-zero produces extreme values) or very high growth rates (hyper-growth rarely sustains long enough to justify paying up). The quality of earnings growth matters too: growth from share buybacks is lower quality than organic revenue-driven growth.

▶How does the PEG ratio compare to the P/E ratio?

The P/E ratio tells you how much you are paying per dollar of current earnings, but it ignores growth. A stock with a P/E of 30 might be cheap if it is growing earnings 40% annually, or expensive if growth is only 5%. The PEG ratio adjusts for this by normalizing the P/E by the growth rate. Peter Lynch, who popularized the metric, argued that a fairly priced stock should have a P/E roughly equal to its growth rate (PEG of 1.0). The PEG allows you to compare stocks with different growth profiles on a more level playing field. A 30 P/E with 30% growth (PEG 1.0) is cheaper than a 15 P/E with 5% growth (PEG 3.0).

PEG Ratio (Price/Earnings to Growth) is one of the signals monitored daily in the AI-driven macro analysis on Convex Trading. The platform synthesises data across monetary policy, credit, sentiment, and on-chain metrics to generate actionable trade recommendations. Create a free account to build your own signal layer and see how PEG Ratio (Price/Earnings to Growth) is influencing current positions.

ShareX Reddit LinkedIn HN

Macro briefings in your inbox

Daily analysis that explains which glossary signals are firing and why.