Define Enough
Set a sufficiency threshold that governs risk and aligns assets with their purpose
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 6
- Confidence
- 97%
Define Enough converts an abstract desire for greater wealth into a concrete risk-governance decision. The investor identifies what each pool of assets must fund, when the money will be required, and how much is sufficient. Assets already needed for a near-term or essential goal can then move toward a more conservative structure, while genuine surplus or legacy assets may accept greater risk. This avoids doubling down after financial security has already been achieved and prevents relative performance from replacing the portfolio's real purpose. Because life goals, spending, and resources change, the sufficiency threshold must be reviewed regularly. The output is a portfolio whose risk reflects what the money is for, not how much more someone else has earned.
Origin
Jack Brennan learned the importance of defining enough from a wise older gentleman and continued applying it to individuals, education accounts, and institutional endowments.
Core principles
- 01Assets exist to fund specific goals
- 02More return is not automatically more valuable
- 03Once enough is secured, unnecessary risk can destroy the objective
- 04Different asset buckets can carry different levels of risk
- 05Enough changes as needs, resources, and time horizons change
How to run it
- 1
Name the purpose
Describe the real-world outcome each pool of assets must support, such as retirement spending, tuition, charitable giving, or an institutional program. Avoid treating wealth accumulation as a purpose by itself.
Pro tip Use separate buckets when assets serve materially different purposes.
Watch out An undefined purpose makes every additional return appear equally valuable.
- 2
Calculate sufficiency
Estimate how much each objective requires and when the funds will be used. Include realistic spending, inflation, and a margin for uncertainty.
Pro tip Express enough as a range rather than a falsely precise number.
Watch out Ignoring future purchasing power can understate the required amount.
- 3
Assess the consequence of loss
Ask what would happen if the sufficiently funded assets fell substantially. Reduce risk when a loss would jeopardize an essential outcome.
Pro tip Compare the benefit of additional upside with the human cost of falling below enough.
Watch out Past success can increase overconfidence precisely when preservation matters most.
- 4
Assign risk by bucket
Use conservative positioning for assets with fixed, near-term requirements and consider greater risk only for long-horizon surplus or legacy assets. Do not impose one allocation on every goal.
Pro tip Let the spending date influence the glide path.
Watch out A more aggressive surplus bucket must not expose the essential bucket through leverage or guarantees.
- 5
Choose the fork consciously
Once enough is reached, decide explicitly whether to preserve it or pursue additional upside with identified surplus capital. Record the rationale for that choice.
Pro tip Frame the choice as goal security versus optional upside, not courage versus timidity.
Watch out Failing to choose consciously allows momentum and greed to choose by default.
- 6
Reassess regularly
Review the sufficiency threshold as spending needs, family responsibilities, longevity, and charitable goals change. Adjust the portfolio when the objective changes, not merely when markets move.
Pro tip Pair the review with an annual financial-planning update.
Watch out A threshold set years ago may no longer reflect current obligations.
In the wild
An investor determines that one million dollars can support the remainder of his planned retirement. Instead of doubling down in pursuit of two million, he moves the amount required for essential spending into a suitable lower-risk structure and limits additional risk to surplus assets.
→ A market decline is less likely to destroy an already achievable retirement.
Another investor has enough for personal spending and intends the remainder for charity. She separates the assets into an essential spending bucket and a long-horizon charitable bucket, allowing the latter to hold a more growth-oriented portfolio.
→ Risk is aligned with two different purposes and time horizons.
An education account accumulates assets while the child is young, then becomes progressively more conservative as age eighteen approaches and tuition payments become imminent.
→ The risk of losing required tuition money shortly before use is reduced.
Common mistakes
Moving the goalpost indefinitely
Repeatedly redefining enough upward can keep essential assets exposed to risks that no longer provide meaningful benefit.
Benchmarking against other investors
Relative performance does not reveal whether the portfolio can fund its own obligations.
Using one risk level for every goal
Near-term spending assets and long-term legacy assets have different capacities for volatility and should not automatically share an allocation.
Is it for you?
Best for
It is best for individuals and institutions that can connect assets to identifiable spending, retirement, education, or legacy goals.
Not ideal for
It is not ideal for portfolios whose purpose, liabilities, and time horizon remain completely undefined.
From the transcript
“It's such an important concept because it will determine how much risk you want to or can take”
“it's a one word investment governor, if you will, Is that word enough?”
“the only benchmark any one of us as is our goals and objectives.”
From the episode
Jack Brennan on Succeeding the Legendary John Bogle (Podcast)
Jack Brennan