As noted through this whole discussion, that “informal central bank cooperation” doesn’t really amount to anything. That lesson could be applied to the Bundesbank “selling dollars” in 1969, the PBOC “selling UST’s” in 2015 or the worthless, useless Federal Reserve RRP in 2016. They really don’t know what they are doing, they never have and it truly doesn’t matter fixed or floating. Adjust accordingly because we know how this ends; we’ve already seen it.