Understanding Leveraged Investing
A plain-language introduction to borrowing to invest — margin, HELOC, and the Smith Maneuver — and the tradeoffs the Leverage Strategy Analyser models.
Leveraged investing means borrowing money to invest more than you could from savings alone. The hope is that investment returns outpace the cost of borrowing over time — but leverage amplifies losses exactly as much as it amplifies gains, so understanding the mechanics matters before looking at any projection.
Three common structures
- Margin — borrowing against an investment account itself, at a variable rate that moves with the lender's benchmark. Fast to set up, fastest to unwind, and the first to trigger a margin call if the account's value falls too far.
- HELOC lump sum — borrowing once against home equity and investing the full amount immediately. The debt is fixed at the outset; there's no ongoing borrowing decision to make.
- Smith Manoeuvre — a Canadian strategy that converts a regular mortgage paydown into tax-deductible investment debt over time, by re-borrowing the principal portion of each mortgage payment and investing it.
A thread runs through all three: the interest can often be tax-deductible when the borrowed money is used to earn investment income — which meaningfully lowers the real cost of borrowing. See Is investment loan interest tax-deductible in Canada? for when that applies and when it doesn't.
Why the comparison is hard to do by hand
Every strategy interacts with your province's tax brackets, your mortgage amortization schedule, and long-run market variability at the same time. Small differences in assumptions compound over a 20- or 30-year horizon. That's what the Leverage Strategy Analyser exists to make visible: it runs the same scenario — hundreds of simulated market paths, shared across every strategy so they're compared under identical conditions — through each strategy and your actual tax situation, instead of a single hand-computed spreadsheet row.
The honest caveats
No model captures everything. This one does not simulate margin calls forcing a sale during a crash, and retirement withdrawals are modelled as fixed nominal amounts rather than an inflation-adjusted safe withdrawal rate. Both are documented limitations, not oversights — see the tool's own caveats section for the full list.