Every time fresh cash hits your brokerage account, you face the same question: where does it go? The temptation to 'buy the dip' on whatever has dropped lately is powerful — but research consistently shows that a disciplined rebalancing strategy, directing new contributions toward your most underweight holdings, beats market-timing for most investors over the long run.
Buying the dip sounds rational. Something is cheaper than it was — why not take advantage? In practice, the logic breaks down for a few reasons.
First, you don't know if today's dip is the bottom, the middle of a longer decline, or a brief pause before further drops. Catching the exact low requires not one but two correct calls: buying at the low and selling near the high. Academic literature on market timing is largely unkind; even professional fund managers rarely outperform simple rule-based strategies consistently.
Second, chasing dips tends to concentrate your portfolio rather than diversify it. If Canadian equities have dropped 12% and you funnel every new dollar there, you may end up dramatically overweight in one region or sector without realizing it. That increases your risk just as the asset class is under stress — the opposite of what sound portfolio construction calls for.
Third, buying the dip is psychologically grueling. It requires you to act confidently on bad news, repeatedly. Most investors find this harder than it sounds in theory.
Portfolio rebalancing is the process of bringing your actual holdings back in line with your target allocation. If your plan calls for 40% Canadian equities, 40% international equities, and 20% bonds, but a rally in international stocks has pushed that sleeve to 48%, rebalancing means selling some of the winner and buying the laggards — or, more elegantly, directing new cash toward the laggards.
There are two main rebalancing methods:
For investors who contribute regularly — monthly TFSA contributions, RRSP top-ups, payroll deposits — contribution rebalancing is extraordinarily powerful. It automates the discipline of buying low without requiring you to sell anything or predict the market. For a deeper look at the mechanics, see our guide to portfolio rebalancing in Canada.
On the surface, both strategies involve putting money into an asset that has declined. The difference is the anchor.
Buying the dip uses price action as the anchor: something fell, so you buy it. Contribution rebalancing uses your target allocation as the anchor: your plan says you should hold X% in this asset class, you're currently below X%, so you buy it. The first is reactive and emotional; the second is systematic and plan-driven.
| Factor | Buying the Dip | Contribution Rebalancing |
|---|---|---|
| Decision trigger | Price has fallen | Allocation is below target |
| Requires market prediction | Yes (is this the bottom?) | No |
| Tax events in non-registered accounts | Potentially none (buy only) | None (buy only) |
| Risk of over-concentration | High | Low (bounded by target %) |
| Behavioural difficulty | High (fight instinct) | Low (follow the plan) |
| Long-run evidence | Mixed to negative | Positive (consistent) |
Knowing you should rebalance by contribution is easy; knowing exactly where to put the next dollar requires accurate, up-to-date data on your current weights versus your targets. This is where WealthWise's allocation view becomes a practical tool rather than a dashboard decoration.
WealthWise shows you your current portfolio allocation broken down by asset class, sector, and geography. Because it syncs read-only with your broker through SnapTrade (or imports your CSV), the numbers reflect your actual holdings in real time. You can set target allocations and see — at a glance — which sleeves are underweight and by how much.
When you're ready to deploy new cash, the workflow is straightforward:
No spreadsheet required. No mental math trying to remember what percentage you're supposed to hold in bonds. The gap is visible, the decision is mechanical, and the emotional temptation to chase whatever is in the news gets short-circuited by the data.
This approach pairs naturally with a dollar-cost averaging discipline — regular contributions deployed systematically toward the most underweight holding each period.
Contribution rebalancing works beautifully in accumulation mode, when you're adding money regularly. It has limits.
If markets move sharply — say, equities fall 30% in a short period — your contributions alone may not be large enough to restore your target allocation within a reasonable timeframe. In that scenario, sell-and-buy rebalancing makes sense: trim the overweight bond sleeve (which rose in relative terms as equities fell) and buy equities to return to target.
It also matters where your accounts sit. In a TFSA or RRSP, selling an overweight position to fund an underweight one has no immediate tax consequence — you can rebalance freely. In a taxable non-registered account, selling a position with an embedded capital gain triggers a tax event. This is why many investors prioritize rebalancing inside registered accounts and use contribution rebalancing in taxable accounts. The asset location question interacts closely with rebalancing strategy; our article on asset location vs asset allocation covers that intersection in detail.
How far off-target does an allocation need to drift before you act? Two common approaches:
Check your allocation on a fixed schedule — quarterly or annually — and rebalance at that point if any sleeve is off by more than a set threshold (commonly 5 percentage points). Simple, low-effort, and removes the temptation to over-trade.
Rebalance whenever any asset class drifts more than a fixed percentage above or below its target — say, plus or minus 5%. This can mean acting more frequently in volatile markets but catches large drifts faster.
For most Canadian DIY investors with regular contributions, a hybrid approach works well: use each contribution to nudge the most underweight sleeve (contribution rebalancing), and do a formal threshold check once or twice a year to catch any remaining drift.
Markets don't fall in isolation. They fall with news: a recession scare, a geopolitical event, an earnings miss. That news makes it feel dangerous to buy more of the thing that has dropped. A rules-based rebalancing approach removes that cognitive load. You're not deciding whether the news is bad enough to pause; you're following the plan you set when you were calm and thinking clearly.
Over a full market cycle, this discipline tends to produce better outcomes not because it perfectly times entries, but because it systematically forces you to buy more of cheaper assets and hold less of expensive ones — a mechanical expression of the core investing principle of buying low and selling high, without requiring any prediction at all.
If you want to track how disciplined rebalancing has affected your actual returns over time, WealthWise's benchmark tool lets you compare your portfolio's Time-Weighted Return against the S&P 500 — a useful check on whether your allocation decisions are adding or subtracting value. You can read more about how that comparison works in our guide to comparing your portfolio to the S&P 500 in Canada.
| Trigger | What the article recommends |
|---|---|
| Equities fall 30% in a short period | Contributions alone may not be enough — sell-and-buy rebalancing (trim the overweight bond sleeve, buy equities) makes sense |
| A single sleeve is more than 10 points below target | Consider whether a sell-and-rebalance inside a registered account is warranted |
They can overlap — if an asset class fell, it's likely underweight — but they're driven by different logic. Contribution rebalancing is anchored to your target allocation. You buy what's underweight relative to your plan, not simply whatever dropped in price. This prevents over-concentrating in a single falling asset and keeps your overall risk profile on track.
Most evidence suggests annual or semi-annual rebalancing is sufficient for long-term investors. Using each regular contribution to nudge underweight sleeves reduces how often you need a formal rebalance. Rebalancing too frequently in taxable accounts can generate unnecessary capital gains.
Rebalancing typically reduces return slightly compared to a hypothetical scenario where your highest-return asset kept growing unchecked — but it also reduces volatility and prevents your risk level from drifting far above what you originally intended. For most investors, the smoother ride and lower risk are worth the modest return trade-off.
Registered accounts (TFSA and RRSP) are ideal for sell-and-buy rebalancing because there are no immediate tax consequences when you sell a winner. In non-registered accounts, selling triggers a capital gain, so contribution rebalancing (directing new cash to underweight positions without selling) is often more tax-efficient.
WealthWise shows your current allocation versus your target, making it straightforward to see which sleeve is most underweight. It does not provide personalized financial advice, but the allocation gap view gives you the factual data to make a systematic, plan-based decision about where to direct new cash.
Start with WealthWise for free →Educational content. Figures and rules verified against the official sources above; tax amounts change annually.
Wealth