USD/JPY hits 40-year high, then intervention and BOJ hike trigger reversal
USD/JPY hits 40-year high near 164 In early Q3, USD/JPY surged to a 40-year high near 164, driven by rising US yields, Fed rate hike bets, Middle East oil shocks, safe-haven dollar flows, and weak Japanese economic data.
This is the peak event of the period and a key new development.
Record US-Japan intervention caps rally A record joint intervention by the US and Japan, totaling up to $96.4 billion, capped USD/JPY gains and sent the pair down to 157.95, as authorities acted to support the yen.
This is a major new policy action that directly reversed the trend.
Intervention impact fades, USD/JPY rebounds The intervention's effect faded as Japanese investors bought foreign bonds and oil prices surged, lifting USD/JPY back toward 160, showing the underlying strength of dollar demand.
This explains the rebound after intervention and is new to this period.
BOJ hikes to 1.25%, carry trades unwind In September, the BOJ raised rates to 1.25%, a 31-year high, triggering carry-trade unwinds that pushed USD/JPY to a seven-month low near 152.89, though Fed hikes to 3.75–4.00% and US 10-year yields above 5.2% limited yen gains.
This is the key new monetary policy shift that drove the pair lower.