BOJ Stabilizes Markets as Yen Volatility Drops to Lowest Since 2021
Claire Weston
The Bank of Japan hiked rates to the highest since 1995, yet decision-day dollar-yen swung just 0.43 yen — the narrowest BOJ-day range since January 2021. Markets had priced it all in; the real question is how long 160 holds.
What did the BOJ actually decide?
The central bank raised its benchmark rate to the highest level since 1995 and chose to stop reducing government-bond purchases.
Both moves were fully expected. The yen dipped only slightly to 160.35 per dollar after the announcement.
The Nikkei 225 breached 70,000 intraday for the first time in history.
No governor at the podium — what did Uchida say?
Governor Ueda Kazuo was hospitalized with a liver-cyst infection. Deputy Governor Uchida Shinichi chaired the meeting — the first time since 2010 a policy meeting proceeded without the governor present.
Uchida said underlying inflation carries upside risk beyond the 2% target and the BOJ will keep raising rates to avoid falling behind the curve.
This means → the BOJ's focus has shifted from "can we hike?" to "how big is the inflation risk?" — the case for continued tightening stands unchanged.
Why was the market reaction so muted?
Decision-day dollar-yen traded in a 0.43-yen band — the narrowest BOJ-day range since January 2021.
In plain terms = the market had already bet correctly on both the hike and the bond-purchase halt; by the time results dropped, there was almost nothing left to trade.
SBI FX Trade managing director Ueda Makoto called the press conference "near-perfect" — Uchida struck a balance between hawkish acknowledgment and steady reassurance, giving no hint of a faster hiking pace.
Why is the 160 level so sensitive?
After the April 28 meeting, Ueda Kazuo's press conference was read as insufficiently hawkish. The yen sold off sharply.
Two days later the Ministry of Finance intervened, spending a record ¥11.73 trillion (≈$73.2 billion) over the following month to support the currency.
This reflects something bigger: 160 is not just a number — it is the MOF's action line. Finance Minister Katayama Satsuki has publicly stated she will act again if necessary.
What comes next?
Morgan Stanley MUFG strategists Sugizaki Koichi and Uesu Hirotake wrote: given the MOF's sustained verbal intervention, many investors remain wary of actual FX intervention risk — dollar-yen is likely to stay range-bound.
The Fed's upcoming rate decision is the other key variable — the US-Japan rate differential will directly shape the yen's direction.
In plain terms = the BOJ has shown its hand; the next move depends on what the Fed does and whether the MOF will spend real money again if 160 breaks.
Content is for reference only, not financial advice.