Price-to-Earnings Ratio (P/E)

Investment Vehicles High Relevance

A valuation metric calculated as current stock price divided by earnings per share (EPS). High P/E ratios may indicate growth expectations or overvaluation, while low P/E ratios may suggest undervaluation or investor concerns. Used to compare relative valuations across companies and sectors.

Example

A stock trading at $80 per share with annual EPS of $4 has a P/E ratio of 20 ($80 รท $4). This means investors are willing to pay $20 for every $1 of annual earnings. Compared to a competitor with a P/E of 15, this stock has a higher valuation, possibly reflecting stronger growth expectations.

Common Confusion

Students often confuse high P/E ratios as always "good" when they can indicate overvaluation. Additionally, trailing P/E (using past earnings) differs from forward P/E (using projected earnings), and negative earnings result in meaningless P/E calculations.

How This Is Tested

  • Calculating P/E ratio given stock price and earnings per share
  • Comparing P/E ratios across companies to identify relative valuation differences
  • Interpreting whether a high P/E ratio indicates growth potential or overvaluation based on context
  • Understanding the difference between trailing P/E and forward P/E ratios
  • Recognizing when P/E ratios are not meaningful (negative earnings, cyclical industries)

Calculation Example

Scenario: A stock is trading at $60 per share and the company reported annual earnings per share (EPS) of $3.00.
Formula: P/E Ratio = Stock Price รท Earnings Per Share (EPS)
Steps:
  1. Identify the current stock price: $60
  2. Identify the earnings per share: $3.00
  3. Divide stock price by EPS: $60 รท $3.00 = 20
Result: The P/E ratio is 20, meaning investors are paying $20 for every $1 of annual earnings. This can be compared to industry averages or competitor P/E ratios to assess relative valuation.

Regulatory Limits

Description Limit Notes
P/E Ratio Formula Stock Price รท Earnings Per Share Higher values indicate investors pay more per dollar of earnings

Example Exam Questions

Test your understanding with these practice questions. Select an answer to see the explanation.

Question 1

Jennifer, a value-focused investor, is comparing two technology stocks for her portfolio. Stock A trades at $120 with annual EPS of $8, while Stock B trades at $90 with annual EPS of $3. Both companies operate in the same sector with similar growth prospects. Jennifer wants to identify which stock has a more attractive valuation based on P/E ratios. Which statement is most accurate?

Question 2

The price-to-earnings (P/E) ratio is calculated by dividing which two values?

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Question 3

A stock is currently trading at $75 per share. The company reported annual earnings of $4.50 per share. What is the stock's P/E ratio?

Question 4

All of the following statements about the price-to-earnings (P/E) ratio are accurate EXCEPT

Question 5

An investment adviser is analyzing two stocks in the retail sector. Stock X trades at $50 with trailing twelve-month EPS of $2.50 and projected next-year EPS of $3.00. Stock Y trades at $80 with trailing EPS of $5.00 and projected EPS of $4.00. Which of the following statements are accurate?

1. Stock X has a trailing P/E ratio of 20
2. Stock Y has a forward P/E ratio of 20
3. Based on trailing P/E ratios, Stock Y appears more attractively valued
4. Based on forward P/E ratios, Stock X shows improving earnings expectations

๐Ÿ’ก Memory Aid

Think "P/E = Price of Earnings": How many dollars do you pay for each dollar the company earns? Formula: Stock Price รท EPS. Lower P/E = better value (like paying $10 for a $1 bill vs. $30 for a $1 bill). High P/E means growth hopes or overpaying.

Related Concepts

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