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.
Published 2026-07-21
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 — the structure never. The result is a collection, each piece having its logic and the whole having none. The correct order starts with the structuring 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 often sufficing. The rebalancing rule completes the plan, maintaining the risk that was decided rather than the risk that accumulates, and every new idea faces the same admission test: which box does it fill, at what cost? This article runs the full sequence, the conversion of an existing collection into a portfolio and 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 worst handled, because it is answered in dollars rather than temperament: a down payment needed in eighteen months has no capacity for loss, whatever the holder's risk tolerance. Those three answers, written on one page, 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. That split follows directly from the three preceding answers: a twenty-year horizon with a real capacity for loss supports a high equity weighting; a three-year horizon does not. Writing down the target weights, sixty-forty for instance, with the tolerated bands, turns an intention into a checkable rule. Without that written step, the portfolio drifts with each successive purchase and nobody notices.
Choose products last, never first
The usual order gets inverted: most people pick a product heard about somewhere, then build the portfolio around it. The correct 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 slot; two funds holding the same securities fill only one while giving the illusion of diversifying. That illusion 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. The rule is written in advance precisely because it applies at the moments when it is hardest to follow. New contributions go first toward correcting the gaps, which rebalances without selling and avoids a taxable gain in a non-registered account. Doing it on a schedule rather than on a view of the market is the whole point of writing the rule down first.
Quebec scenario: compare before confirming
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, a gold position taken during a scare. Each purchase had its logic; the whole has none. His new advisor actually refuses to discuss products at the first meeting: the order of decisions, she explains, is what separates a portfolio from a collection. First decision: the goal — retirement in twenty-two years, 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, 75% equities split across Canadian, American and international markets, 25% bonds — a structure 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, sheltered from tax inside the RRSP. The rebalancing rule completes the plan: a five-point drift triggers the return to targets, maintaining 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 reflexive: 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
Frequently asked questions
Why does the order of decisions matter so much in investing?
Because a product chosen before the structure answers a question that was never asked: goal, horizon and loss capacity define the target weights, and products merely fill the boxes at the lowest cost. The reverse order produces a collection, not a portfolio.
How are target weights between categories set?
From the horizon and the loss capacity tested in dollars: the equity portion is calibrated to what you can watch fall temporarily without selling, the bond and cash portion to the coming years' needs. The structure gets written before any product name.
What about positions that fit no box?
Sell them, prioritizing registered accounts where the sale has no tax impact, or let them fade by no longer feeding them. Every new investment idea then faces the same admission test: which box of the plan does it fill, and at what cost?