Georgette 5/20 Portfolio Rule
Cap single-asset and sector exposure to protect long-term wealth
- Difficulty
- Moderate
- Time to result
- ~ongoing to results
- Steps
- 5
- Confidence
- 99%
The Georgette 5/20 Portfolio Rule is a concentration-control system O'Leary attributes to his mother. No individual stock or bond may exceed 5 percent of the portfolio, and no sector may exceed 20 percent. When appreciation pushes a holding above its cap, sell enough to restore the limit rather than letting a winner become an uncontrolled bet. Georgette combined this diversification with large-cap dividend stocks and telecom bonds, using dividends and interest while leaving principal untouched. O'Leary says she maintained the portfolio for 55 years and used its income to support education and relatives. The reusable mechanism is not a promise of exceptional returns; it is a set of exposure limits, periodic rebalancing, and principal preservation designed to prevent one conviction from determining the whole portfolio's fate.
Origin
O'Leary learned the rule from his mother, Georgette, who built and managed a diversified portfolio for 55 years while keeping the accounts independent.
Core principles
- 01No single holding should dominate the portfolio
- 02No sector should control the outcome
- 03Rebalance when appreciation breaks a limit
- 04Use income-producing assets without consuming principal
How to run it
- 1
Map the portfolio
List every stock and bond with its current percentage of total invested assets. Assign each holding to a sector.
Watch out Use current market values rather than original purchase prices.
- 2
Apply the holding cap
Flag any individual stock or bond above 5 percent. Reduce oversized positions to restore the limit.
Watch out Taxes, fees, and personal circumstances can affect how rebalancing should be executed.
- 3
Apply the sector cap
Add exposure across each sector and flag totals above 20 percent. Reallocate until no sector controls the portfolio.
Pro tip Check sector exposure after large market moves, not only after new purchases.
- 4
Separate income and principal
Track dividends and interest separately from principal. If the goal is preservation, fund withdrawals from income rather than selling the base portfolio.
Watch out Portfolio income is variable and may not cover spending needs.
- 5
Rebalance repeatedly
Recalculate both caps on a regular schedule and whenever a position changes materially. Treat the limits as continuing rules, not a one-time setup.
In the wild
O'Leary says that when one of Georgette's stocks rose above 5 percent of her portfolio, she sold it down rather than allowing its success to create a concentrated risk.
→ The portfolio returned to its per-holding limit while retaining diversified exposure.
Common mistakes
Letting conviction override the cap
A large bet makes one belief capable of wiping out a disproportionate share of wealth.
Checking holdings but not sectors
Many individually small positions can still create excessive exposure when they share one sector.
Is it for you?
Best for
It is best for long-term investors who want simple concentration limits and disciplined rebalancing.
Not ideal for
It is not ideal as personalized investment advice or for portfolios whose constraints make these exact caps impractical.
From the transcript
“No more than 5% in any one stock or bond of the portfolio, and no more than 20% in any one sector”
“When a stock ran up past five, she'd sell it down.”
“She never spent any of the principal. Only the dividends and the interests.”
From the episode
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