Housing finance does not move in isolation. Mortgage costs reflect a chain of expectations involving inflation, labor markets, central bank policy, and the long end of the sovereign bond curve.
Retail mortgage rates are often discussed as if they were set directly by policy makers, but lenders mostly price them off funding conditions, term premia, credit spread assumptions, and hedging costs. When longer-dated yields move, the quoted cost of housing finance usually follows.
Credit conditions, household balance sheets, and government bond supply all interact. That is why a housing story can quickly become a rates story, and a rates story can just as easily become a broader growth narrative. Watching mortgages alongside bonds gives a cleaner read on the economic cycle than tracking either market alone.