The core idea
Higher yields reduce the market value of existing fixed-rate bonds held by banks.
What is happening underneath
Whether those losses become economically disruptive depends on accounting treatment, hedging, capital, liquidity and whether the bank must sell securities.
How investors should read it
Funding pressure can turn an unrealized duration loss into a realized liquidity problem.
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.