The core idea
The maturity profile determines when an issuer must repay or refinance principal and therefore how quickly current market rates feed into financing costs.
What is happening underneath
Long maturities can delay the impact of higher rates, while concentrated near-term maturities accelerate it.
How investors should read it
Average coupon alone can hide this timing risk.
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.