In-Depth Notes on Price-to-Earnings Ratio

Price to Earnings Ratio (PE)

  • Definition: Price to earnings (PE) ratio allows standardization of stock prices across companies, making it possible to assess whether a company's stock is overvalued or undervalued by comparing price per share to earnings per share (EPS).
    • Example: General Motors (GM) stock price = $43/share, Costco stock price = $908/share.

Key Terms

  • Stock Price: Amount paid for one share of stock.
  • Earnings Per Share (EPS): Company's net income divided by the number of shares outstanding, indicating how much income is generated for each share.
  • Formula: EPS=Net IncomeShares OutstandingEPS = \frac{\text{Net Income}}{\text{Shares Outstanding}}

PE Ratio Calculation

  • Example of PE Calculation:
    • Company A: Stock Price = $100, EPS = $5
    • PE = 1005=20\frac{100}{5} = 20
    • Interpretation: Paying $20 for every $1 of earnings.
    • Company B: Stock Price = $200, EPS = $5
    • PE = 2005=40\frac{200}{5} = 40
    • Interpretation: Paying $40 for every $1 of earnings.

Interpretation of PE Ratios

  • Low PE: Could indicate undervaluation or lack of investor demand.
  • High PE: Could indicate overvaluation or high investor demand due to anticipated growth.
  • Current Benchmark: Typical PE in S&P 500 = 25.

Market Dynamics and Investor Behavior

  • Investor tendencies affect market reactions:
    • Retail investors often sell stocks during downturns due to panic.
    • Anticipation of economic downturns affects stock prices in cyclical industries (e.g., auto manufacturing).

Comparisons by Industry

  • It’s better to compare PE ratios among similar companies within the same industry to measure relative valuation accuracy.
    • Example: Comparing Costco to Walmart instead of General Motors due to differing business models and growth expectations.

Estimating Price Based on PE

  • Example:
    • ABC Company EPS = $2, Industry Average PE = 9.5
    • Current Price = $14
    • PE = 142=7\frac{14}{2} = 7
    • Interpretation: Potential undervaluation since PE is lower than industry average.

Historical Context and Investment Strategies

  • Holding investments historically leads to better long-term gains even with market fluctuations.
    • Example: $10,000 investment in S&P 500 since 1980 would exceed a million today if held consistently. Missing top market days can drastically affect returns.

Valuation Multiples

  • Price to Book (P/B) Ratio: Compares a company’s market value to its book value (assets - liabilities).
    • Example Calculation: If Target has a market cap of $43B and a book value of $13B, the P/B ratio = 4313=3.3\frac{43}{13} = 3.3

Consideration of Growth Rates in Valuation

  • Investors assess future growth via various metrics:
    • A dividend growth model estimates share price based on anticipated dividends which can directly affect perceived value.
    • Example: Coca Cola assumes an 8% required return and a 7% growth rate for estimating share price.
    • If actual growth falls below expectations, it can lead to downgrading the stock's perceived value.

Conclusion

  • Use multiple valuation methods (PE, Price to Book, and Dividend Discount Models) to develop a comprehensive view of a company’s potential worth.
  • Always consider market context, investor sentiment, and industry comparisons when making investment decisions.