Beyond Net-Nets: Applying Benjamin Graham's Intrinsic Value Formula to Growth Stocks.

Beyond Net-Nets: Applying Benjamin Graham's Intrinsic Value Formula to Growth Stocks

Benjamin Graham’s legacy in value investing rests heavily on his net-net approach and his intrinsic value formula, laid out in Security Analysis. His core premise: buy securities priced below their liquidation value to create a margin of safety. While net-nets suit deeply undervalued, often distressed companies, modern markets and growth stocks demand adaptation. This article dissects Graham’s intrinsic value formula and modifies it to accommodate growth stocks. We will ground the discussion with a real-world example using Alphabet Inc. (GOOGL).

Graham’s Traditional Intrinsic Value Formula

Graham’s intrinsic value estimate hinges on earnings power and asset backing. The classic formula:

[ V = \frac{EPS \times (8.5 + 2g) \times 4.4}{Y} ]

Where:

• ( V ) = Intrinsic value per share
• ( EPS ) = Trailing twelve months earnings per share
• ( 8.5 ) = P/E base for a no-growth company
• ( g ) = Estimated long-term earnings growth rate (percent)
• ( 4.4 ) = Average yield of high-grade corporate bonds in 1962
• ( Y ) = Current yield of AAA corporate bonds

This formula adjusts the base P/E by growth and normalizes it by bond yields, anchoring the valuation to economic conditions. Graham’s model assumes a stable business generating earnings with predictable growth and a margin of safety derived from conservative inputs.

Limitations on Growth Stocks

Growth companies, like GOOGL or AAPL, rarely fit Graham’s net-net mold. Their valuations embed future earnings far beyond current EPS. The formula’s reliance on historical EPS and static growth estimates undervalues companies reinvesting earnings at high rates.

Two core issues arise:

1. EPS Base Understates Potential: Growth companies often show volatile earnings due to reinvestment, acquisitions, or R&D expenses. Trailing EPS may undervalue intrinsic worth.

2. Linear Growth Assumption: The formula presumes a fixed long-term growth rate ( g ), ignoring compounding effects and changing growth trajectories.

To adapt, traders must incorporate forward-looking earnings and a more robust growth model.

Modifying the Formula for Growth Stocks

A practical modification introduces projected earnings growth over a finite high-growth period, followed by terminal growth. The intrinsic value becomes the discounted sum of future earnings per share, adjusted for required returns.

Define:

• ( EPS_0 ) = Current EPS
• ( g_1 ) = High growth rate (years 1 to ( n ))
• ( n ) = High growth duration (years)
• ( g_2 ) = Terminal growth rate (stable phase)
• ( r ) = Required rate of return (discount rate)

The formula:

[ V = \sum_{t=1}^{n} \frac{EPS_0 \times (1+g_1)^t}{(1+r)^t} + \frac{EPS_0 \times (1+g_1)^n \times (1+g_2)}{(r - g_2) \times (1+r)^n} ]_

This structure captures the present value of earnings during the high growth phase, plus a perpetuity reflecting stable growth thereafter.

Case Study: Applying the Formula to GOOGL

Let’s apply this to Alphabet (GOOGL) using data as of March 2024.

• Trailing EPS (( EPS_0 )): $7.30
• High growth rate (( g_1 )): 15% (projected for next 5 years)
• High growth duration (( n )): 5 years
• Terminal growth rate (( g_2 )): 3% (reflecting long-term GDP growth)
• Required rate of return (( r )): 10% (accounting for market risk and individual risk tolerance)

Step 1: Calculate the present value of high-growth earnings

[ PV_{high} = \sum_{t=1}^5 \frac{7.30 \times (1 + 0.15)^t}{(1 + 0.10)^t} ]

Calculate each term individually:

Sum of PV high growth earnings = 7.63 + 7.98 + 8.34 + 8.72 + 9.12 = 41.79

Step 2: Calculate terminal value at year 5

[ TV_5 = \frac{EPS_5 \times (1 + g_2)}{r - g_2} = \frac{14.682 \times 1.03}{0.10 - 0.03} = \frac{15.122}{0.07} = 216.03 ]

Discount terminal value back to present:

[ PV_{TV} = \frac{216.03}{1.6105} = 134.14 ]_

Step 3: Calculate intrinsic value

[ V = PV_{high} + PV_{TV} = 41.79 + 134.14 = 175.93 ]

As of March 2024, GOOGL trades around $135 per share. The intrinsic value estimate at $175.93 suggests a 30% upside, highlighting a potential edge given the assumptions.

Entry Rules

• Buy when market price < 80% of intrinsic value: This 20% margin of safety buffers estimation errors and market volatility. For GOOGL, enter below $140.
• Confirm growth assumptions with analyst consensus and company guidance: Buy only if consensus supports a minimum 12%-15% earnings CAGR over 5 years.
• Validate discount rate against market conditions: Adjust ( r ) if risk-free rates or market volatility shift.

Exit Rules

• Exit when price reaches intrinsic value: Close position when the market price approaches or exceeds the calculated intrinsic value to lock gains.
• Reassess intrinsic value annually: Update growth and discount rates with latest earnings and macro data.
• Cut losses if growth assumptions break down: For example, a sustained EPS downgrade below 10% CAGR invalidates model assumptions.

Stop Placement

• Set a stop-loss 15% below entry price to protect capital from unexpected shocks.
• Alternatively, use trailing stops to lock gains once price passes 90% of intrinsic value.
• Monitor quarterly earnings; widen or tighten stops based on earnings volatility.

Position Sizing

• Allocate no more than 5% of portfolio per position to manage idiosyncratic risk.
• Use Kelly Criterion variant to size positions based on edge:

[ f^* = \frac{(bp - q)}{b} ]*

Where:

• ( b ) = odds received on bet (risk/reward ratio)
• ( p ) = probability of success (based on confidence in growth projections)
• ( q = 1 - p )

If confidence in assumptions is 70% (p=0.7), downside risk 15%, upside potential 30%, calculate accordingly.

Defining the Edge

The edge lies in applying a disciplined intrinsic valuation that incorporates growth projections rather than relying solely on trailing EPS or net-net liquidation values. This approach aligns Graham’s margin of safety with growth investing’s realities, offering a quantifiable framework for identifying mispriced growth stocks.

Summary

Benjamin Graham’s intrinsic value formula retains relevance but requires adjustments to handle growth stocks. Incorporating projected earnings growth and terminal value calculation transforms the model into a practical tool for modern markets. GOOGL’s example demonstrates how this method can reveal meaningful upside with a defensible margin of safety.

Experienced traders can integrate this approach into their screening and trade management processes by defining strict entry and exit rules, disciplined stop placements, and position sizing rooted in objective edge assessment. This fusion of Graham’s principles with growth dynamics yields a robust, actionable value investing framework for growth equities.