📊 ETF

The Role of Bonds in Your Canadian Investment Portfolio

Published June 25, 2026 · 8 min read · By the WealthWise team · Updated June 25, 2026

⚠️ For information only. General facts and concepts; WealthWise is not a registered investment advisor and gives no personalized advice. Verify with the sources and consult a licensed professional before acting.

In short — Bonds are not there to beat the stock market — they serve as ballast: reducing portfolio volatility, generating predictable income, and giving you dry powder to buy stocks at a discount when markets crash.

When you start investing, equities grab all the attention. Bonds seem boring — and often, they are. But that's precisely their strength. Understanding why and how to hold bonds is one of the most durable foundations of long-term wealth management. This guide is educational and does not constitute personalized financial advice.

Lean 100% Equities

You accept far more dramatic drawdowns during severe bear markets like 2008 or March 2020
You don't need regular coupon income to cover expenses
You're fine having no dry powder to rebalance into stocks after a crash — you can only hold or sell at a loss

Lean Adding a Bond Ballast

You want less dramatic drawdowns and to "sleep considerably better" during bear markets
You want regular coupon income you can reinvest or use without forcing asset sales at the worst time
You want dry powder — bonds to sell so you can buy equities at a discount when they fall

Reflects the ballast, income, and rebalancing benefits described in the article.

Why Hold Bonds: The Ballast Concept

A bond is essentially a loan you make to a government or corporation. In return, the issuer pays you regular interest (the coupon) and returns your principal at maturity. Government of Canada and provincial bonds are among the safest securities in the world.

Their primary role in a portfolio is not to maximize returns, but to act as ballast — a counterweight that stabilizes the whole. During severe bear markets (2008, March 2020), high-quality government bonds often rose in value while equities plunged. Investors with 40% in bonds experienced far less dramatic drawdowns than those who were 100% in stocks — and slept considerably better.

A second concrete benefit: bonds generate regular income through coupon payments. This cash flow can be reinvested or used to cover expenses without forcing asset sales at the worst possible time.

The Inverse Relationship Between Interest Rates and Bond Prices

This is the most important — and most misunderstood — concept about bonds. When interest rates rise, the prices of existing bonds fall. When rates fall, bond prices rise. Why?

Imagine you hold a bond paying 3% per year. If market rates rise to 5%, nobody will pay full price for your 3% bond — its price must fall so that its effective yield becomes competitive. The reverse is equally true: if rates drop to 1%, your 3% bond becomes very attractive and its market value rises.

This price sensitivity is called duration risk. Duration measures how sensitive a bond is to rate changes: the longer the duration (long-term bonds), the more the price swings. A 10-year bond will lose roughly 10% of its value for every 1% rise in interest rates. Short-term bonds are far less sensitive.

This is why bonds are not "risk-free" — they simply carry a different kind of risk than equities.

Lean Bond ETF (e.g. ZAG, VAB)

You want instant diversification across hundreds of issuers
You want to buy or sell anytime on the exchange (liquidity)
You want automatic management — maturing bonds are reinvested for you, keeping the target duration
You don't need a precise amount back on a specific date

Lean Individual Bond (or GIC)

You want to know exactly what you'll get back and when (fixed maturity date)
You need a precise amount on a specific date
You're comfortable that individual bonds can be difficult to resell before maturity
You don't need the fund's value to fluctuate continuously with interest rates

Based on the trade-offs described in the article: ETFs trade a fixed maturity date for diversification, liquidity, and automatic management.

Bond ETFs vs Individual Bonds: What's the Difference?

Most retail investors access bonds through exchange-traded funds (ETFs) such as the ZAG bond ETF (BMO Aggregate Bond Index ETF) or VAB (Vanguard Canadian Aggregate Bond Index ETF). Both ETFs hold hundreds of Canadian government and investment-grade corporate bonds, with very low management expense ratios (around 0.09–0.12%).

Advantages of bond ETFs:

Instant diversification — you hold hundreds of different issuers, dramatically reducing the risk of any single default.
Liquidity — you can buy or sell at any time on the exchange, unlike individual bonds which can be difficult to resell before maturity.
Automatic management — as bonds mature, the fund reinvests in new ones, maintaining the target duration without any action on your part.

The main drawback of a bond ETF: it has no fixed maturity date. Unlike an individual bond where you know exactly what you'll get back and when, an ETF's value fluctuates continuously with interest rates. If you need a precise amount on a specific date, an individual bond or a GIC may be more appropriate.

Rule	Allocation	Best suited for	Known limitation
60/40 portfolio	60% equities, 40% bonds	Retirees or near-retirees seeking balance between growth and stability	Underperformed an all-equity portfolio in the 2010–2021 low-rate environment, with near-zero expected bond returns
"Your age in bonds"	Bond % = your age (e.g. 35% at age 35, 60% at age 60)	Investors who want bond exposure to rise automatically as retirement nears	Doesn't account for pension income, job stability, or actual risk tolerance — age alone isn't the full picture
Both rules — reality check	—	—	In 2022, ZAG and VAB fell roughly 12% as the Bank of Canada hiked rates aggressively — bonds are not immune to losses

These are starting points, not absolute truths, per the article.

How Much to Hold in Bonds? Rules of Thumb and Their Limits

Two popular heuristics have circulated for decades:

The 60/40 portfolio — 60% equities, 40% bonds. For a long time, this allocation offered an excellent balance between growth and stability for retirees or near-retirees.
"Your age in bonds" — if you're 35, hold 35% bonds; at 60, hold 60%. The idea is that the older you get, the less you can afford a major correction just before drawing down your savings.

These rules are starting points, not absolute truths. In a low-rate environment (2010–2021), the 60/40 underperformed an all-equity portfolio, and bonds offered near-zero expected returns. In 2022, when the Bank of Canada raised rates aggressively, ZAG and VAB fell roughly 12% — a reminder that bonds are not immune to losses.

Your actual risk tolerance, investment horizon, and liquidity needs matter more than your age alone. A 60-year-old with a solid government pension can afford more equities than a 40-year-old with volatile self-employment income.

The Strategic Power of Rebalancing: Buying Stocks When They Fall

This is the least discussed advantage of holding bonds — and one of the most powerful. During a market crash, your equity holdings drop and your allocation drifts from your target. For example, if you were aiming for 70/30 (equities/bonds) and stocks fall 30%, you may end up at roughly 60/40 — too much in bonds relative to your plan.

Disciplined rebalancing then forces you to sell your bonds (which held their value) to buy equities at a discount. It feels counterintuitive — but it's exactly what the most effective long-term investors do. It's a systematic way to buy low and sell high, without needing to predict the market.

This mechanism only works if you had bonds to sell in the first place. A 100% equity portfolio has no such flexibility — you can only hold or sell at a loss. Bonds give you dry powder to act when opportunities arise.

Frequently asked questions

Are bonds actually useful for a 25-year-old investor?

That's a fair question. At 25 with a 35+ year horizon, a high equity allocation is often well-justified. That said, even a small bond allocation (10–20%) can improve your behaviour during crashes — reducing anxiety and giving you something to rebalance from. The real goal is staying invested and not panic-selling at the bottom.

What's the difference between ZAG and VAB?

Both ZAG (BMO) and VAB (Vanguard) track the FTSE Canada Universe Bond Index, which includes federal, provincial, and investment-grade corporate bonds. Their long-term performance is nearly identical. Differences are minor — slightly different MERs, different liquidity profiles. Both are excellent low-cost choices for broad Canadian bond exposure.

Can I lose money in a bond ETF?

Yes. In 2022, ZAG and VAB each fell roughly 12% as the Bank of Canada hiked rates aggressively. Bond ETFs are not guaranteed like GICs — they fluctuate with interest rates. Over the long run, total return (coupons plus price changes) has historically been positive, but short-term losses are real and can be significant.

Do bonds keep up with inflation?

Not always. Fixed-rate bonds suffer when inflation is high, since fixed coupon payments lose purchasing power in real terms. Real return bonds (like Canadian government Real Return Bonds linked to CPI) provide explicit inflation protection, but come with their own trade-offs and limited ETF availability. Diversification across asset classes remains the most practical approach for most investors.

Sources & references

Educational content; verify figures with official sources before acting.