The Intelligent Investor — Chapter 4: Portfolio Policy & Rebalancing

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Graham's Chapter 4: The classic 50/50 equity-bond asset allocation framework and mechanical rebalancing rules.

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The Intelligent Investor — Chapter 4: Portfolio Policy & Rebalancing

"The sound investor must always divide his funds between high-grade bonds and common stocks." — Benjamin Graham

Wall Street Context

Chapter 4 details asset allocation discipline, introducing Graham's legendary 50/50 Equity-Bond Framework.

Graham recognized that human psychology is the investor's greatest liability. Investors rush to 100% equity allocation at market tops and flee to cash at market bottoms. The 50/50 rule enforces mechanical, anti-emotional behavior.

Wall Street Application

1. The 50/50 Allocation Baseline

  • Target Allocation: 50% Quality Equity Index + 50% High-Grade Bonds/Treasuries.
  • Permissible Tactical Range: Shift between 25% and 75% equity based on extreme valuation shifts, but never drop below 25% equity nor exceed 75% equity.

2. The Power of Mechanical Rebalancing

If a bull market expands equities to 70% of the portfolio, rebalancing automatically forces you to sell high (lock in stock gains) and move funds into bonds. If a crash shrinks equities to 30%, rebalancing forces you to buy low (deploy bond cash into discounted stocks).

| Market State | Portfolio Shift | Mechanical Rebalancing Action | Psychological Effect | |---|---|---|---| | Euphoric Bull Peak | Equities expand to 70% | Trim stocks; sweep into bonds | Automatically harvesting gains | | Panic Bear Crash | Equities contract to 30% | Trim bonds; buy discounted stocks | Mechanically buying fire-sale valuations |

Trading Execution Rules

  1. Schedule Fixed Audits: Execute rebalancing annually on a fixed calendar date.
  2. Respect the 25/75 Boundaries: Never go 100% stock or 100% cash, regardless of market sentiment.
  3. Eliminate Timing Predictions: Replace market-timing guesses with systematic allocation mechanics.

Relation to Retirement Portfolios

The 50/50 allocation represents a premier retirement policy. Bonds fund living withdrawals during equity bear markets, while stocks deliver long-term real growth. Rebalancing preserves peace of mind.