Leverage
Effet de levier in French
Quick definition
Leverage means investing with borrowed money, so a given asset move produces a larger move in your own equity. It amplifies gains and losses by exactly the same multiple, which is why it builds fortunes and destroys them with the same machinery.
The symmetric math
Leverage is a multiplier, and the multiplier does not care about direction. Buy a $500,000 house with a 20% down payment of $100,000 and you control an asset worth five times your equity: 5x leverage. Every percentage move in the property is a five-times-larger move in your own money.
| Property moves | House value | Your equity | Return on your money |
|---|---|---|---|
| +10% | $550,000 | $150,000 | +50% |
| No change | $500,000 | $100,000 | 0% |
| -10% | $450,000 | $50,000 | -50% |
| -20% | $400,000 | $0 | -100% |
The forms Canadians actually use
The most leveraged purchase of most Canadian lives is the mortgage, and it is also the leverage that has worked best for ordinary people. That is not because houses are magic; it is because the structure is forgiving. A mortgage forces decades of holding through every downturn, the lender never issues a margin call just because prices dipped, and as long as the payments arrive, a temporary decline in home equity is an abstraction rather than an event.
The second family is borrowing against the house to invest: a HELOC drawn for a portfolio, or its systematic version, the Smith Manoeuvre, which pairs the borrowing with a tax deduction. Same multiplier, but now the leveraged asset is a market portfolio that reprices daily.
The third is the margin account, where the broker lends against your holdings and can force a sale when markets fall, the least forgiving structure of the three. Finally there are leveraged ETFs, which deserve one honest line: they reset their leverage daily, so over weeks or months their return can drift far from "double the index", making them trading tools rather than holdings.
What separates survivable leverage from fatal
The difference between leverage that compounds wealth and leverage that ends it usually comes down to three questions, none of which is about the expected return.
- Is there a forced-sale trigger? A mortgage has none; a margin loan has one built in. Leverage you can be forced out of at the bottom converts temporary declines into permanent losses. Leverage you cannot be forced out of lets you wait.
- Does your income cover the carrying cost? Interest arrives every month regardless of what markets do. If servicing the debt depends on the investment performing, one bad stretch feeds on itself.
- Does the horizon match? Borrowed money on a decades-long asset with decades of runway is a different proposition from borrowed money that must be repaid, or that can be called, before a downturn has time to reverse.
A note on tax
Canada softens the cost of some leverage: interest on money borrowed to earn investment income in a taxable account may be deductible, which is the quiet engine behind HELOC-based investing strategies. The conditions are genuine, the use of funds must qualify and be traceable, and Québec applies its own provincial limit, so the deduction is something to confirm with a professional rather than assume.
The sober close
Leverage never improves an investment. It cannot turn a bad asset into a good one, and it adds interest cost and fragility to whatever it touches. All it does is make outcomes louder: a sound investment held survivably becomes more rewarding, and a poor one, or a good one held fragilely, becomes more destructive. Decide on the investment first, on its own merits. Only then decide whether it deserves amplification.
In Canada
Canadian household leverage is dominated by mortgages, and policy is built around that fact: minimum down payments, the mortgage stress test that checks whether borrowers survive higher rates, and mortgage default insurance for smaller down payments all exist to keep the country's biggest leverage habit survivable. Investment leverage is more constrained, since registered accounts such as the TFSA and RRSP cannot borrow at all, leaving margin and HELOC strategies to taxable accounts. The result is a country highly leveraged to housing and lightly leveraged to markets.
Worked example
Two neighbours each have $100,000 and strong nerves. Priya buys a $500,000 condo with hers, at 5x leverage through a mortgage. Marc opens a margin account, deposits his $100,000 and borrows to hold $200,000 of equities at 2x.
A rough year arrives: the condo market and the stock market each fall 15%. Priya's equity is down 75% on paper, far worse than Marc's 30% loss. But nobody can force Priya to sell; she keeps making payments, and years later the market has recovered and her equity with it. Marc's decline triggers a margin call mid-drop; unable to add cash, he is partially sold out near the low and recovers with a smaller position. The smaller multiplier lost more, because the structure, not the math, decided the outcome.
Reviewed by Alexandre Bernier, CFP®, CIM®, PFP®·Updated August 2026