You brought up some good points re Saudi’s selling USTs and benefit from higher rates, just so they have room to drop or stimulate later. Re falling rates, I posted years ago on the old G-Eagle site that I think the USA was following Japan lock step.
If so, logic would suggest if Japan was first to go into deflation and drop rates and USA followed, then it would make sense for us to see Japan to recover some inflation and raise rates FIRST and us second.
I think the bottom line problem globally is the rest of the world had been depending on the US consumer/taxpayer since Dec 7th 1941. After 1975, TPTB neglected to inflation protect the US consumer/taxpayer wages, resulting that financial meltdown in 2008 that ENDED the party.