Via Zoltan Pozsar at Credit Suisse:
The FOMC should forget about r* for the moment and focus on Sagittarius-A* – the supermassive black hole at the center of global dollar funding markets. The black hole is the foreign RRP facility, which has seen close to $100 billion of inflows since the beginning of the year. The driver of these inflows is the curve inversion, and the longer the inversion persists the more inflows will follow.
The trade war is also contributing to the inflows – given the inversion, as foreign central banks weaken their currencies they “buy” the foreign RRP facility and not Treasuries like in the past. Foreign central banks are rate shopping… …and an uncapped foreign RRP facility is what enables that.