How Bond Yields Affect Mortgage Rates in Alberta
Short answer
Fixed mortgage rates follow Government of Canada bond yields closely — especially the 5-year GoC bond for 5-year fixed mortgages. When yields rise, lenders' funding costs rise and fixed mortgage rates tend to increase. Bond yields reflect inflation expectations and Bank of Canada policy outlook, often moving before the overnight rate changes.
The plain-English version
Lenders fund fixed-rate mortgages by borrowing in bond markets. The 5-year fixed mortgage rate typically tracks the 5-year GoC bond yield plus a lender spread. That spread is relatively stable short term, so bond yield moves translate fairly directly into fixed rate repricing — sometimes within hours on active trading days.
Variable rates are less tied to bond yields and more tied to prime, which follows the overnight rate. That is why fixed and variable rates can diverge — a flat or falling bond yield environment can lower fixed rates while prime stays elevated, or vice versa. Smart shoppers watch both curves.
Alberta-specific considerations
- Alberta buyers choosing between fixed and variable should compare 5-year bond yield trends with prime outlook — they can signal different directions.
- Renewal timing in a falling-yield environment can benefit fixed-rate shoppers — start comparing 120 days before maturity.
- Bond market volatility can reprice fixed rates between Bank of Canada announcement dates — do not rely only on policy meeting calendars.
Example scenario
The 5-year GoC bond yield rises from 2.85% to 3.25% over a month. A lender maintaining a 1.90% spread moves its 5-year fixed offer from 4.75% to 5.15%. On a $400,000 mortgage over 25 years, that 0.40% increase adds roughly $85/month — a planning estimate.
Common mistakes to avoid
- Assuming Bank of Canada cuts guarantee lower fixed rates — bonds may already price in cuts or react to inflation data instead.
- Ignoring bond yields when deciding to lock a fixed rate hold.
- Expecting fixed and variable rates to move in lockstep — they are driven by different markets.
- Using stock market moves as a proxy for mortgage rates — bonds are the relevant benchmark for fixed rates.