The core idea
The U.S. dollar affects global bond markets through funding costs, capital flows, commodity pricing and the burden of dollar-denominated debt.
What is happening underneath
A stronger dollar can tighten financial conditions for borrowers outside the United States.
How investors should read it
Currency-hedging costs also influence how attractive foreign bonds are to international investors.
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.