I figured it out in a cynical way.
rising interest rates mean the money printing entity might not be pressing their hegemonic power to it's fullest.
Some institutiojnal buyers want the safety of Treasury bonds over dumping all their cash into The Big Casino. Raising interest rates means more of them buy govt. bonds; lowering interest rates means they borrow Fed money instead, since it means negative interest rates re inflation. It isn't rocket science. Waiting to see what the FEd is going to do re interest rates is temporarily uncertainty, especially for foreign govts. and corps, hence its effects on the markets. Negative interest rates mean free money for the big prime borrowers and looser loan requirements and more money going out, to mortgage lending, corporate spending, etc., i.e. corporate welfare.