What Is Graham Number

The Graham Number is a classic valuation metric introduced by Benjamin Graham, the father of value investing. It provides a quick way to estimate a stock’s fair value using only two key financial figures: earnings per share (EPS) and book value per share (BVPS).

Graham designed it to indicate a maximum price considered conservative and aligned with fundamental value.

The metric remains popular among value investors because it offers a simple yet disciplined approach to screening stocks and identifying potentially undervalued opportunities.

The Graham Number is the maximum fair price a conservative investor should pay for a stock, based on Graham’s principles. It combines two important factors:

• a company’s ability to generate earnings, and
  

• its net asset value.

In simple terms, the Graham Number indicates whether a stock is undervalued, fairly valued, or overvalued relative to its earnings and book value.

If the stock price is:

• Below the Graham Number → It may be conservatively valued
  

• Above the Graham Number → It may be richly priced

This makes the Graham Number a practical tool for value-oriented stock screening.

Benjamin Graham derived a specific formula combining EPS and BVPS to calculate a stock’s fair price ceiling.

Formula:

Graham Number = √(22.5 × EPS × BVPS)

Pointers to Understand the Formula

• EPS (Earnings Per Share): Indicates profitability
  

• BVPS (Book Value Per Share): Shows net asset value
  

• 22.5: A constant derived from Graham’s recommended limits:
  

  • Maximum P/E ratio = 15
    

  • Maximum P/B ratio = 1.5
    

  • So → 15 × 1.5 = 22.5

This constant keeps the valuation conservative and rooted in Graham’s principles.

Let’s understand how to apply the formula to a real-world scenario.

Suppose a company has:

• EPS = ₹20
  

• BVPS = ₹150

Step-by-step calculation:

1. Multiply the values:
   22.5 × 20 × 150 = 67,500
   

2. Take the square root:
   √67,500 ≈ ₹259.80

Interpretation:

• If the stock is trading at ₹220, it may be considered conservatively valued.
  

• If it trades at ₹350, it could be priced above conservative value norms.

This example illustrates how the Graham Number helps identify relative valuation based on earnings and balance sheet strength.

The Graham Number offers a number of benefits:

• Simple, quick valuation tool: Only requires EPS and BVPS to compute.
  

• Conservative approach: Helps investors avoid overpaying for stocks.
  

• Combines earnings and assets: Unlike metrics that rely on one dimension, it factors both profitability and net worth.
  

• Useful for screening: Can be used to identify stocks with valuation below the calculated benchmark.
  

• Objective benchmark: Provides a clear numerical value to compare against the current market price.

When the current price is below the Graham Number, the stock may be conservatively priced; if it is far above, the market may have already priced in higher growth expectations.

While helpful, the metric has important limitations:

• Doesn’t account for growth: Companies with strong growth potential may appear expensive under this method.
  

• Not suited for asset-light businesses: Tech, digital, and service-based companies may have low book values, distorting the Graham Number.
  

• Ignores intangible assets: Modern firms derive value from IP, brand, and technology—none of which are captured in BVPS.
  

• The constant 22.5 is outdated: Graham created this in a different market era; it may not reflect modern valuation conditions.
  

• Not useful for cyclical companies: Earnings volatility can skew results.

Therefore, while the Graham Number is a valuable starting point, it should not be the sole basis of investment decisions.

Following is a quick look at how the Graham Number fits into value-focused analysis:

• Typically suited for asset-heavy businesses such as manufacturing, chemicals, utilities, and financials
  

• Works well where earnings are stable and predictable
  

• Helps value investors identify stocks that may be undervalued relative to their fundamentals
  

• Less useful for:
  

  • High-growth tech companies
    

  • Asset-light service firms
    

  • Startups and loss-making companies
    

• Often used alongside other metrics like P/E, P/B, and ROE to confirm valuation strength

Value investors appreciate the Graham Number because it promotes discipline and prevents emotional overpayment.

This content is for informational purposes only and the same should not be construed as investment advice. Bajaj Finserv Direct Limited shall not be liable or responsible for any investment decision that you may take based on this content.