> Now if China initiated a mass sell-off of all of its US treasuries, there would be huge ramifications. But in its current form, this seems to just be one more way for China to slowly unravel its position in US treasuries while playing with the value of the RMB.

Offloading foreign currency holdings in a mass sell-off is not something China would WANT to do -- it would end up destabilizing the Chinese economy more than the US economy. Not even as an economic warfare tactic: the global economy is dependent on cheap US money, and messing with that would set off a global recession that would hit an emerging superpower like China especially hard.

I think you're right and China is just looking to rebalance its currency by drawing the dollar down a bit. That's not the worst idea in the world (either for China or for the US) and they're doing it right around the time the Fed was planning to raise rates anyway. I think the market is already spooked enough by the troubles in China that it would probably welcome a rate increase (for the reasons you listed above).