What Is Driving the JPY Today
The Japanese Yen is the most unusual major currency. For decades the BoJ kept rates near zero or negative, which made the yen the world's favourite "funding currency" — traders borrowed cheap yen and used the proceeds to buy higher-yielding assets elsewhere. That setup means JPY direction is driven less by Japanese fundamentals and more by what is happening to US Treasury yields and to global risk appetite.
When US 10-year yields rise, USD/JPY rises with them — sometimes by huge amounts. When global risk falls apart and investors unwind their carry trades, the yen rallies sharply as that borrowed money flows home. This is why JPY has the largest single-day moves of any major currency, and why the Bank of Japan has historically had to intervene in the FX market when moves get extreme.
Bank of Japan — The Central Bank Behind the JPY
The Bank of Japan is the central bank of Japan and operates one of the most unique monetary frameworks in the world. The BoJ controls not just the policy rate but also the shape of the yield curve through its Yield Curve Control (YCC) policy. BoJ meetings are eight times a year and Governor Kazuo Ueda holds press conferences after each. Markets pay enormous attention to any hint that YCC tweaks are coming, because adjustments produce immediate JPY repricing.
What the BoJ watches most
- Tokyo CPI (released a couple of weeks before national CPI — leading indicator)
- National CPI inflation — the headline that the BoJ's 2% target measures against
- Wage negotiation outcomes (the annual Shunto wage talks in March)
- Tankan business sentiment survey — the BoJ's favourite leading indicator
- US Treasury 10-year yield — not a Japanese metric, but the single biggest USD/JPY driver
What Moves the JPY Most
These are the events and dynamics that move the yen most, ranked roughly by typical impact:
- BoJ policy meeting outcomes (especially YCC adjustments) — biggest single mover; can produce 200+ pip USD/JPY moves
- US 10-year Treasury yield moves — largest day-to-day driver; USD/JPY often tracks the 10-year tick-for-tick
- MOF intervention threats and actual interventions — capable of producing 500+ pip moves in a single session
- Risk-off events (equity selloffs, geopolitics) — yen rallies as carry trades unwind
- BoJ governor or deputy speeches — every word parsed for hints of YCC change or rate hike
Best Pairs to Trade JPY Sentiment
JPY pairs are some of the most volatile in forex. Pick the right one for the view you want to express: