The yen remains undervalued on multiple metrics with no clear policy path to appreciation; positioning in USDJPY will track whether the BoJ tightens or the market reprices the duration of weakness.
What moved
The yen remains undervalued on multiple metrics with no clear policy path to appreciation; positioning in USDJPY will track whether the BoJ tightens or the market reprices the duration of weakness.
The market transmission
A yen that sits weak despite structural valuation underside leaves carry trades profitable and dampens urgency to unwind. The Bank of Japan faces a choice between accepting the weakness and letting inflation expectations rise, or raising rates to defend the currency, which would tighten financial conditions when growth is already soft. Markets will price the BoJ's next move rather than any mechanical return to fair value.
What would change this
Undervaluation on metrics does not force mean reversion; the yen has sat weak through structural capital outflows and carry demand, and it can stay weak. The headline treats valuation as a puzzle to solve, but weak currencies persist when policy rates are low and capital flows favour outflows. The trade lives in BoJ signalling, not in the valuation gap itself.
Directional leans
USDJPY ▼ low