How to Take Risk the Right Way: Diversification, Leverage, and Risk-Adjusted Return
Risk isn't something to eliminate — it's something to take deliberately, in the right amount, in the right places. These three concepts are how you tell the difference between risk that's working for you and risk that's just sitting there, waiting to hurt you.
Diversification: more than just more accounts
Diversification means spreading investments across different assets so that no single risk can sink your entire portfolio — the classic "don't put all your eggs in one basket." But real diversification runs deeper than simply owning a lot of accounts.
If your RRSP, TFSA, corporate account, and insurance policy all end up holding overlapping funds, you may be duplicating risk rather than reducing it — plenty of physicians discover, once they actually lay everything side by side, that their "diversified" portfolio is really the same handful of holdings wearing different labels. Done properly, diversification protects your downside and keeps growth steady, without adding unnecessary cost or confusion along the way.
Leveraging: borrowing to grow, both ways
Leveraging means using borrowed money to invest, on the bet that the return will outpace the cost of borrowing. A mortgage is the most familiar version most people already live with: as long as the property appreciates faster than the interest being paid, leverage is working in your favour.
But leverage cuts both directions. Borrowing to invest in more volatile markets can amplify losses just as easily as it amplifies gains — and unlike a paper loss you can simply wait out, borrowed money still has to be repaid, often on a timeline that has no interest in waiting for the market to recover. Leverage isn't inherently reckless. It's a tool that demands you understand exactly what you're on the hook for if things go the other way.
Risk-adjusted return: the number that actually matters
Risk-adjusted return asks a more useful question than "what's the return?" — it asks how much return you're getting for the risk you took to get it. Chasing the highest possible number isn't the goal. Finding the balance that lets you stay invested through both good markets and bad ones is.
A steady 7% is often the better outcome over a volatile 12% that has you checking your portfolio every day and second-guessing the plan the first time it drops. The volatile option might win on paper in a good year — but if it also tempts you to sell at the worst possible moment, the number on the page was never the real return you experienced.
MER: the cost sitting inside the return
A Management Expense Ratio is the annual fee taken by a mutual fund or ETF manager, expressed as a percentage of what you have invested. A 2% MER quietly takes $20 a year for every $1,000 invested — deducted directly from performance, so there's never a bill to see, just a smaller number at the end of the year than there otherwise would have been.
The gap between a 2% MER and a 0.5% MER can amount to tens or hundreds of thousands of dollars over a few decades, purely from lost compounding. Knowing your MER is really a risk-adjusted return question in disguise: a fund charging more has to clear a higher bar before it's actually earning its keep.
The common thread
Diversification manages the risk you're exposed to. Leverage decides how much risk you're choosing to amplify. Risk-adjusted return — after fees, including the MER quietly working in the background — is the honest scorecard for whether all of it was worth it. None of these questions can really be answered by looking at a return number in isolation.
