The dollar fell as much as 3% against the yen on Thursday, then dropped further on Friday. The Japanese Ministry of Finance intervened heavily to prop up its currency. In just one hour, the USD/JPY exchange rate plummeted from 158.3 to 155.5 yen—a move not seen in months. 💴
🔍 What’s happening?
On Friday, the dollar fell another 0.66% to hit a low of 155.60 yen, down from 157.12 just a few hours earlier. Currently, at the time of writing, the USD/JPY is trading around 157.16. The exact reasons behind Friday’s latest move remain unclear, but analysts point to market jitters following Thursday’s intervention.
Jeremy Stretch, head of G10 currency strategy at CIBC Capital Markets, explains that liquidity is low and market participants remain on high alert. Every sudden fluctuation in the yen immediately raises the question of another official intervention. Atsushi Mimura, Japan’s top monetary official, stated Friday morning that authorities were prepared to return to the markets if necessary. A blunt warning.
💡 Why does this matter?
Tokyo is defending its yen against a dollar boosted by U.S. interest rates. The interest rate gap between the Fed and the Bank of Japan remains enormous. This gap is driving speculators to short the yen on a massive scale. In fact, the yen had lost 5% in just three months prior to this intervention. For forex traders, volatility in the USD/JPY pair is a windfall, but also a trap if Tokyo strikes again.
Upcoming holidays in Japan are reducing trading volumes, making the market even more fragile. Japanese authorities know this is the ideal time to destabilize speculative positions. A surprise intervention in an illiquid market can trigger sharp movements of several percentage points in just a few minutes.
📊 Our view
For us, Tokyo’s message is clear: don’t touch the yen. Japanese authorities have shown they won’t let the yen plummet without reacting. Atsushi Mimura isn’t bluffing. His warning on Friday is a direct threat to funds betting on a weaker yen.
The interest rate differential between the United States and Japan technically justifies a strong dollar against the yen. But monetary policy isn’t enough when a government decides to intervene with billions of dollars in the foreign exchange market. The timing is formidable: low liquidity, holidays, inflated speculative positions. We are witnessing a classic battle between speculators and the central bank. Historically, central banks eventually give in, but in the short term, they can inflict massive losses on short sellers. In Europe, the ECB is also monitoring these rate dynamics, even if the euro remains less exposed than the yen for now.
We anticipate extreme volatility in USD/JPY over the coming days. For French traders: reduce your leverage and set tight stops if you’re trading this pair. Tokyo could strike at any moment, and a 2–3% gap in just a few minutes could wipe out any poorly protected position.
✅ Key Takeaway
- The yen jumped 3% on Thursday following intervention by Tokyo
- The dollar fell back to 155.60 yen on Friday before rebounding
- Japanese authorities warn they may intervene again
- Extreme volatility expected on USD/JPY due to holidays
- The Fed/BoJ rate differential is driving speculators to short the yen
What do you think? Do you believe Tokyo can really reverse the trend in the face of the rate differential, or is this just a temporary respite for the yen?
🔎 See also
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Source: Reuters, Japanese Ministry of Finance, CIBC Capital Markets
