The core idea
Major sovereign bonds trade across global time zones, and futures, currencies and related markets continue incorporating information outside local cash-market hours.
What is happening underneath
Foreign economic data, central-bank decisions and geopolitical events can therefore reprice yields before the domestic session opens.
How investors should read it
Global fixed income is a continuous information network rather than a market confined to one exchange.
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.