[MARKET UPDATE] USD/JPY continues to extend lower, and falls towards a 159.55 trough, but lacks a clear driver

The operative precedent is the pattern around prior excursions toward the 160 area, which have tended to draw stepped-up verbal intervention from Japanese officials followed, on some occasions, by actual operations; the sequence has usually been accelerating one-way moves, then a Ministry of Finance comment, then either a sharp retracement or a test of resolve. The distinction worth drawing is between yen weakness driven by rate differentials, which officials have historically tolerated when orderly, and moves flagged as speculative or disorderly, which have prompted action; speed and the absence of a macro trigger have been the tell that shifts the language from the former to the latter. Lacking a clear driver also raises the weight on cross-yen flows and any concurrent move in US yields, since a divergence between the pair and the differential has in past episodes flagged flow-driven action prone to mean reversion. Worth observing next are comments from Japanese financial officials, the pace of any further extension, and whether the move is corroborated across other yen pairs. As a flow note rather than an event, the information content is the positioning it implies.