How Bond Rates Affect Mortgage Rates in Canada
When Canadians shop for a mortgage, one of the first questions they often ask is: “Will mortgage rates go down?”
While the Bank of Canada receives much of the attention when it comes to interest rates, another important factor can influence the rates offered on fixed-rate mortgages: bond yields.
Understanding the relationship between bond rates and mortgage rates can help homebuyers, homeowners renewing their mortgages, and real estate investors better understand why mortgage rates move the way they do.
What Are Bond Rates?
When discussing mortgage rates, the term “bond rates” generally refers to Government of Canada bond yields, particularly the yields on bonds with terms that are similar to the mortgage being offered.
A bond is essentially a loan made by an investor to a government or other issuer. In return, the investor receives interest and eventually gets their principal back.
Government of Canada bonds are considered relatively low-risk investments. Their yields are influenced by factors such as inflation expectations, economic growth, employment data, monetary policy expectations and demand for government debt.
When bond yields rise, lenders often increase the interest rates they charge on fixed-rate mortgages. When bond yields fall, fixed mortgage rates may also decline.
Why Do Bond Yields Affect Fixed Mortgage Rates?
The key is understanding how lenders finance and price fixed-rate mortgages.
When a lender offers you a five-year fixed mortgage, for example, it is committing to provide you with a fixed interest rate for five years. The lender needs to manage the cost and risk associated with providing that money for the term of the mortgage.
Government bond yields provide an important benchmark for that pricing.
Generally, lenders price fixed mortgage rates at a spread above comparable Government of Canada bond yields.
The spread compensates the lender for factors such as operating costs, funding costs, credit risk and the lender's desired return.
This means that if the five-year Government of Canada bond yield rises significantly, fixed five-year mortgage rates can come under upward pressure.
Conversely, if the bond yield falls, lenders may have room to reduce fixed mortgage rates.
The Bank of Canada Is Different
One of the biggest misconceptions about mortgages is that the Bank of Canada directly determines all mortgage rates.
It doesn't.
The Bank of Canada's overnight policy rate has a particularly strong influence on variable-rate mortgages and lines of credit.
When the Bank changes its overnight rate, lenders typically adjust their prime rates, which can affect variable mortgage payments and borrowing costs.
Fixed mortgage rates work differently.
Although expectations about future Bank of Canada decisions can influence bond yields, the Bank does not simply announce a five-year fixed mortgage rate.
This is why fixed mortgage rates can sometimes move before the Bank of Canada changes its policy rate.
Why Can Fixed Mortgage Rates Change Before the Bank of Canada?
Financial markets are constantly looking ahead.
Suppose investors believe inflation is going to fall and the economy is slowing. They may begin expecting interest rates to decline in the future.
Those expectations can influence bond yields today.
As bond yields move lower, lenders may eventually reduce their fixed mortgage rates—even if the Bank of Canada has not yet made a corresponding change to its overnight rate.
The opposite can also happen.
If inflation appears stronger than expected, economic growth accelerates or investors expect interest rates to remain higher for longer, bond yields can rise. Fixed mortgage rates may subsequently increase.
This is one reason mortgage rates can change even when the Bank of Canada hasn't made a new rate announcement.
What Does This Mean for Homebuyers?
For a Toronto or GTA homebuyer, understanding bond yields can provide additional context when deciding when to lock in a mortgage rate.
If you're considering a fixed-rate mortgage, watching the direction of Government of Canada bond yields can provide an indication of where fixed mortgage pricing may be heading.
However, bond yields are only one factor.
Mortgage rates can also be affected by lender competition, funding costs, mortgage qualification rules, credit risk, economic conditions and the type of mortgage being offered.
The rate available to one borrower may also differ from another based on factors such as down payment, property type, credit profile, mortgage amount and whether the mortgage is insured.
What About Mortgage Renewals?
Bond yields can also be relevant to homeowners approaching mortgage renewal.
If your existing mortgage was arranged several years ago at a substantially different rate, today's fixed mortgage pricing may look very different.
Rather than focusing solely on the Bank of Canada's next announcement, homeowners should consider the broader interest-rate environment and how fixed and variable mortgage options compare.
It's also important to start the renewal process early. Having time to review different lenders and mortgage structures can provide more flexibility than simply accepting the first renewal offer from your existing lender.
The Bottom Line
Bond yields and mortgage rates are closely connected, particularly when it comes to fixed-rate mortgages.
A simplified way to think about the relationship is:
Government bond yields → lender funding/pricing → fixed mortgage rates
Meanwhile:
Bank of Canada overnight rate → lender prime rate → variable mortgage rates
Neither relationship is perfectly one-to-one, and mortgage pricing can be influenced by many other factors.
But understanding these two different mechanisms can make mortgage-rate movements much easier to understand.
For buyers, homeowners and investors in the Toronto and GTA real estate markets, keeping an eye on both Government of Canada bond yields and Bank of Canada interest-rate decisions can provide valuable context when evaluating mortgage options.
Ultimately, the right mortgage strategy isn't necessarily about trying to predict the exact bottom or top of interest rates.
It's about understanding your financial situation, your timeline and your tolerance for interest-rate risk—and choosing a mortgage structure that fits your circumstances.
