The yen just surged 1.5% in a matter of minutes in a nearly empty market. It went from 157.2 to 156 against the dollar, then quickly bounced back to 157. Tokyo is sending a clear message to speculators. 💴
🔍 What’s going on?
On Monday, May 4, a public holiday in Japan, the yen surged sharply while liquidity was at its lowest. The USD/JPY is currently around 157, following this flash move that pushed the pair down by just over one yen.
The Japanese Ministry of Finance did not comment when contacted by Reuters. Finance Minister Satsuki Katayama, speaking from Uzbekistan, declined to confirm any intervention, according to Bloomberg. No one is saying anything officially, but everyone gets the message.
According to Masahiko Loo, senior strategist at State Street Investment Management, we are witnessing either a modest, calibrated operation or movements amplified by the low liquidity of Golden Week. The goal would be to keep the markets on alert rather than deploy full firepower.
💡 Why does this matter?
This is the second intervention in just a few days. Last Thursday, Tokyo reportedly spent around $35 billion to push the yen up by 3%. This time, the operation is more discreet, but the message remains the same: the authorities are watching and will strike without warning.
The yen has been stagnating for weeks near its all-time lows in real terms (the Japanese currency’s real purchasing power). This weakness is fueling domestic inflation and weighing on the cost of living for Japanese citizens. Policymakers have issued repeated warnings in recent weeks before taking action.
For forex traders, this is a game-changer for USD/JPY. Shorting the yen becomes risky when Tokyo can intervene at any time, especially during quiet trading sessions where just a few billion yen are enough to move the market by 1 to 2%.
📊 Our take
It’s guerrilla trading, central bank style. Tokyo strikes quickly, outside of regular hours, and then goes silent.
We believe these interventions won’t change the underlying trend. The yen remains structurally weak as long as the Bank of Japan keeps rates near zero while the Fed stays above 4%. Thursday’s 35 billion yen injection triggered a 3% rebound that faded within 48 hours. On Monday, the trend reversed even more quickly. Analysts quoted by Reuters make it clear: Tokyo’s buying is unlikely to reverse the yen’s downward trend. But these warning shots make trading much more nerve-wracking. A short position opened at 157 could get stopped out at 155 overnight for no fundamental reason, just because Tokyo decided to intervene. For the French trader, the lesson is simple: if you’re trading USD/JPY, reduce your position size and widen your stops. The risk of a surprise intervention is now a full-fledged market factor.
We remain bearish on the yen in the medium term (and therefore bullish on USD/JPY), but we’re playing it safer. Wait for post-intervention pullbacks to enter, and hedge during quiet Asian sessions.
✅ Key Takeaway
- The yen jumped from 157.2 to 156 on Monday in a matter of minutes
- Tokyo reportedly spent 35 billion last Thursday for a 3% rebound
- Interventions do not change the trend but make trading risky
- USD/JPY is currently trading around 157
- The yen remains near its all-time lows in real terms
What do you think? Will you keep shorting the yen despite the risk of intervention, or will you wait for Tokyo to run out of ammunition?
🔎 See also
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Source: Reuters, Japanese Ministry of Finance, State Street Investment Management
