The Investor Constitution

Before any allocation question can be answered, three things must be written down: what the money is for, when it is needed, and in which currency it will be spent.

• Purpose determines how much shortfall risk is tolerable.
• Horizon determines which risks are volatility and which are permanent.
• Currency determines what "risk-free" actually means for you.

An investor without a stated liability will unconsciously adopt the market's — which is a one-year, dollar-denominated, benchmark-relative liability that almost nobody actually has.

Three things cause permanent loss: paying a price that embeds expectations the business cannot meet, holding an asset whose cash flows are structurally declining, and being forced to sell.

Only the third is under your direct control, and it is controlled with liquidity and leverage policy — not with forecasting.

If a 30% drawdown would change your behaviour, you are already over-allocated, whatever the spreadsheet says.

Every position must be accompanied by a one-sentence statement of the expectations embedded in its price, and a one-sentence statement of why those expectations are wrong.

If the second sentence is a restatement of consensus — "AI is transformative", "rates will stay high" — there is no edge, only exposure.

For equities, build the reverse DCF. For bonds, decompose the forward curve. For anything else, state what the current price implies about the next five years and ask whether that is demanding or generous.

Correlation is not a property of assets; it is a property of the regime. The relevant test is not "how many holdings do I have" but "how many distinct macro outcomes does my portfolio survive".

Map every holding to what it needs: growth, disinflation, liquidity, or a weak currency. If one column is empty, that is where the next allocation goes.

A 1.2% total cost drag compounded over 25 years consumes roughly a quarter of terminal wealth. No strategy allocation decision available to a private investor has that magnitude of certain impact.

Rank decisions by (impact × certainty). Cost reduction, tax placement and turnover discipline rank above almost every security selection question.

Before entering: write the thesis, the falsifier, the size, and the rebalancing rule.

• The falsifier is the observable fact that would make you exit. "The price fell" is not a falsifier.
• The size is set against the stressed scenario, not the expected one.
• The rebalancing rule is mechanical: thresholds, not moods.

Review positions on a schedule. Never on a headline.

Any financing that can be withdrawn shortens your horizon to the lender's patience. That includes explicit margin, but also implicit leverage: illiquid holdings against near-term spending, concentrated employer exposure, and options with expiry dates.

Where leverage is used, it is termed, capped, and stress-tested against a simultaneous fall in the asset and rise in the funding rate.

Record, for every decision: the date, the thesis, the expectations you believed were mispriced, your confidence, and what you expected to observe.

Review annually and grade the process, not the P&L. A good decision that lost money stays in the playbook. A lucky one is removed from it.

The default action is no action. A change requires a change in facts, not a change in mood, and must clear the friction it creates: spread, tax, and the risk of replacing a known exposure with a less understood one.

The strongest structural advantage a private investor has over an institution is the freedom to be inactive for years. Most give it away voluntarily.