The core idea
Mortgage rates are influenced by the broader interest-rate curve because mortgage lenders and investors compare mortgage cash flows with government bonds and other fixed-income assets.
What is happening underneath
In the United States, mortgage pricing is particularly sensitive to intermediate and long-term rates plus mortgage-specific spreads and prepayment risk.
How investors should read it
A central-bank rate move therefore affects mortgages indirectly through expectations and bond-market pricing.
The same market move can carry different information depending on which maturity, issuer and risk premium is changing. Read the question together with the underlying concepts rather than treating one price move as a universal signal.