Asset Allocation or Product Selection: Decide in the Right Order
Set the goal, horizon and loss capacity first, then the target weights: products come last.
In this article
A portfolio is built in a precise order, and most get built in the reverse one: products first (a fund recommended here, a promising stock there), structure never. The result is a collection, where each piece has its logic and the whole has none. The right order starts with the structural decisions: the goal and its horizon, the loss capacity tested in dollars rather than percentages, then the target weights among asset classes, written before any product name. Products come last, chosen to fill each box at the lowest cost. Three or four are often enough. The rebalancing rule completes the plan and maintains the risk that was decided rather than the risk that accumulates. Every new idea faces the same admission test: which box does it fill, and at what cost? This article runs through the full sequence, explains how to turn an existing collection into a portfolio and offers the test that protects the structure against fashions.
Set the goal, the horizon and the capacity for loss
Three elements precede any investment choice, and they come from your situation, never from a product. The goal: what will this money be for? The horizon: in how many years? The capacity for loss: what temporary decline can you absorb without having to sell? That last question is the one most often mishandled, because the answer is given in dollars, not by temperament. A down payment needed in eighteen months has no capacity for loss, whatever the holder's risk tolerance. Write those three answers on one page. They then decide almost everything else.
Set target weights across asset classes
The split among equities, fixed income and cash explains most of a portfolio's behaviour over time, far more than the choice of products implementing it. It follows directly from the three preceding answers. A twenty-year horizon with a real capacity for loss supports a high equity weighting, while a three-year horizon does not. Write down the target weights, sixty-forty for instance, with the tolerated bands: an intention becomes a rule you can check. Without that written step, the portfolio drifts with each successive purchase and nobody notices.
Choose products last, never first
The usual order is reversed: most people pick a product they heard about somewhere, then build the portfolio around it. The right approach fills a structure already decided, which reduces product selection to a few measurable criteria: management fees, replication of the intended index, size and liquidity, tax treatment by account type. A diversified low-fee index fund fills one box. Two funds holding the same securities fill only one while giving the illusion of diversifying. That is the most common flaw in portfolios built product by product.
Rebalance to maintain the risk you decided on
A portfolio left alone drifts. The class that rises gains weight, and the real risk pulls away from the chosen risk, generally upward, just before it matters. Rebalancing brings the weights back toward their targets, at a fixed frequency or when a gap exceeds an agreed threshold, five points for example. Write the rule in advance, because it applies precisely at the moments when it is hardest to follow. Use new contributions first to correct the gaps: you rebalance without selling and avoid a taxable gain in a non-registered account. Rebalancing on a schedule rather than on your view of the market is the whole point of writing the rule down.
Quebec scenario
The RRSP of a physiotherapist in Warwick resembles a kitchen drawer: a tech fund bought in 2021, two ETFs recommended by different podcasts, a dividend fund inherited from a former advisor and a gold position taken during a scare. Each purchase had its logic, but the whole has none. His new advisor refuses to talk about products at the first meeting. The order of decisions, she explains, is what separates a portfolio from a collection. First decision: the goal. It is retirement in twenty-two years, with no other deadline. The loss capacity, tested in dollars rather than percentages, tolerates a temporary $60,000 drop on his $210,000 in assets. Second decision: the target weights, which are 75% equities split across Canadian, American and international markets, and 25% bonds. This structure is written down before any product name. Third decision only: the products, chosen to fill each box at the lowest cost. Three ETFs suffice, and the orphan positions get sold, with no tax inside the RRSP. The rebalancing rule completes the plan: a five-point drift triggers the return to targets, which maintains the risk that was decided rather than the risk that accumulates. A year later, a colleague raves about a promising new fund. His answer fits in one question, now a reflex: which box does it fill?
Checklist
- Write the goal and its horizon first
- Test the loss capacity in dollars
- Set the target weights among categories
- Choose products last, at the lowest cost
- Sell orphan positions inside registered accounts
- Write the rebalancing rule
- Put every new idea through the box test
- Refuse products with no box to fill
- Reread the structure once a year
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