The core idea
Credit spreads widen when investors demand greater compensation for default risk, downgrade risk, liquidity risk or uncertainty.
What is happening underneath
Recession fears, weaker earnings, tighter financial conditions and forced selling can all contribute.
How investors should read it
A spread move can therefore reveal stress that is not visible in government yields alone.
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.