The core idea
A bear flattener occurs when yields rise while shorter-maturity yields rise more than longer-maturity yields.
What is happening underneath
It often appears when markets price a more aggressive near-term central-bank tightening path.
How investors should read it
The move can compress bank-style maturity spreads while increasing losses on fixed-rate bonds.
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.