What Is PEG Ratio?

When people talk about finding “fairly valued stocks,” they usually begin with the P/E ratio. But the P/E ratio tells only half the story. A company may look expensive or cheap based on earnings alone, while its future growth potential remains hidden behind the numbers.

That’s exactly where the PEG Ratio steps in. It’s a small calculation that adds a very important dimension to stock analysis — growth.

PEG Ratio Meaning

PEG Ratio = Price-to-Earnings (P/E) Ratio ÷ Expected Earnings Growth Rate

While the P/E ratio tells you how the market values the company today, the PEG ratio tells you whether that valuation is justified by future earnings growth.

In simple terms:
PEG helps you understand if a stock is expensive or cheap after considering growth.

Why Investors Prefer PEG Over Just P/E

A high P/E stock might still be a great bargain if the company is growing rapidly. Likewise, a low P/E stock might not be attractive if there is barely any growth ahead.

That’s why PEG is useful:

• It blends valuation + growth
• It gives a more realistic picture of the company
• It helps compare companies across sectors

PEG brings context, something raw P/E numbers often fail to do.

How to Interpret PEG Ratio

Here’s a simple way to read PEG values:

PEG Ratio	Interpretation
Less than 1	Possibly undervalued (growth is strong)
Around 1	Fairly valued
Above 1	Could be overvalued

Note: Market conditions, industry type, and growth stability can all influence what is considered a “good” PEG for a particular stock.

Example of PEG Ratio

Imagine two companies:

• Company A:
  • P/E = 20
  • Growth rate = 25%
  • PEG = 20 ÷ 25 = 0.8
• Company B:
  • P/E = 12
  • Growth rate = 5%
  • PEG = 12 ÷ 5 = 2.4

On P/E alone, Company A looks expensive.
But once you factor in growth, Company A is actually the more attractive opportunity.

Limitations of PEG Ratio

No financial metric is foolproof, and PEG also comes with caveats:

• Growth estimates may be inaccurate
• Not very useful for cyclical companies
• Hard to apply on companies with inconsistent earnings
• PEG is less effective for early-stage businesses

So, think of PEG as one tool among many, not the final word.

Why PEG Ratio Matters for Retail Investors

Many retail investors focus heavily on price and ignore growth. PEG gently forces you to consider both. It makes comparisons cleaner and helps in spotting opportunities that are not easily visible through P/E alone.

In short, PEG adds clarity — something every investor could use.

FAQs on PEG Ratio

Q1. What is a good PEG ratio?
A value below 1 is often considered attractive, but this varies by industry and growth stability.

Q2. Is PEG ratio better than P/E ratio?
They serve different purposes. P/E shows valuation; PEG adds the missing growth context, making it more well-rounded.

Q3. Can PEG be used for all companies?
Not effectively. It works best for companies with predictable and steady earnings growth.

Q4. Is PEG ratio useful for short-term trading?
PEG is more of a long-term valuation tool. Traders may rely on momentum or technical indicators instead.

Q5. What if a company has zero or negative growth?
PEG becomes meaningless because you cannot divide by zero or a negative number.