The Price/Earnings to Growth (PEG) ratio is a financial metric that builds on the Price-to-Earnings (P/E) ratio by factoring in a company's expected earnings growth rate. It helps investors assess whether a stock is fairly valued, overvalued, or undervalued based on both its current earnings and its projected growth.

The formula for the PEG ratio is:

Where:

• P/E Ratio is the price-to-earnings ratio.
• Earnings Growth Rate is the expected annual growth in earnings, expressed as a percentage.

Key Points:

• PEG = 1: The stock is considered fairly valued, as its price reflects its earnings growth rate.
• PEG < 1: The stock is considered undervalued, meaning its price is low relative to its growth potential.
• PEG > 1: The stock may be overvalued, indicating that investors are paying more for the company's growth than it's expected to deliver.

Why the PEG Ratio is Useful:

• The P/E ratio alone doesn't account for a company's growth rate, which can make high-growth companies appear overvalued based solely on P/E.
• The PEG ratio adjusts for growth expectations, providing a more balanced view of whether a stock’s price aligns with its earnings potential.

Example: If a company has a P/E ratio of 20 and an expected earnings growth rate of 10%, its PEG ratio would be:

PEG Ratio = 20/10 = 2

A PEG ratio of 2 suggests that the stock may be overvalued compared to its growth potential.

Use Cases:

• Growth stocks: Investors use the PEG ratio to identify high-growth companies that may be trading at a reasonable price based on their future earnings.
• Value investing: Value investors look for companies with a PEG ratio below 1, as these are typically considered undervalued in relation to their growth prospects.