Credit Spread

A credit spread is the difference in yield between two debt instruments of different credit quality, measured in basis points. It expresses how much extra return investors or lenders demand to hold a riskier obligation instead of a safer one, most often a Government of Canada bond of comparable maturity.

Why credit spreads exist

Lenders price two things: the general level of interest rates and the specific risk of the borrower. The first is captured by the benchmark rate, such as the Government of Canada bond yield or a reference rate tied to the Bank of Canada's policy rate. The second is the spread layered on top.

When economic conditions look stable, spreads tend to narrow, because investors are comfortable taking on risk. When conditions tighten, spreads widen as investors demand more compensation for the chance of default. That is why the yield curve and credit spreads are watched together as a gauge of market sentiment.

How it shows up in Canadian mortgages

For a mortgage borrower, credit spread is embedded in the rate you are quoted, even though it is rarely named on a commitment letter. It appears in a few places:

Lender funding costs. Banks and monoline lenders fund mortgages partly through bond issuance, sometimes as covered bonds or mortgage-backed securities. A wider spread on that funding raises the cost of new mortgage money.
Borrower risk tiering. A borrower with weaker credit or a property in a slower market may be quoted a rate several basis points above the lender's best advertised rate.
Alternative lending. Rates from B-lenders and private lenders sit well above A-lender rates, reflecting a much larger credit spread for the increased risk.

The practical effect is that mortgage interest is never purely a policy-rate story. Two borrowers can face the same Bank of Canada policy rate and still receive different quotes because their credit spreads differ.

A simple comparison

Suppose a five-year Government of Canada bond yields a given rate and a five-year mortgage-backed security from a lender yields somewhat more. The gap is the credit spread. If that gap widens because markets are nervous, lenders typically pass part of the increase on to new borrowers. If it narrows, advertised rates can fall even when the policy rate has not moved. Whether a specific quote changes depends on the lender's funding mix, competition, and its own margin.

Credit spreads are not something a borrower negotiates directly, and they are not published as a line item. They are useful mainly as context: they explain why fixed mortgage rates can drift up or down when the Bank of Canada has done nothing, and why a rate quote reflects both the market backdrop and the borrower's own profile.

Frequently asked questions

What is a credit spread in simple terms?

It is the extra yield a lender or investor earns for holding a riskier debt compared with a safer one, usually a government bond of similar length. A bigger spread means the market sees more risk and wants more compensation. It is normally quoted in basis points, where one basis point is one hundredth of a percentage point.

Do credit spreads affect my Canadian mortgage rate?

They can. Lenders fund mortgages partly through bond markets, so wider spreads raise their cost of funds and can push new mortgage rates higher even when the Bank of Canada has not changed its policy rate. The size of the effect varies by lender and by how competitive the market is at the time.

Why do two borrowers get different rates from the same lender?

Rate quotes combine a baseline market rate with a risk adjustment for the borrower and property. Differences in credit score, income documentation, down payment, property type, and location can all widen or narrow that adjustment. Federal rules such as the stress test and OSFI Guideline B-20 also shape who qualifies and on what terms.