The yen's fall to 1986 lows: a hidden threat to bitcoin and the entire crypto market
The Japanese yen has closely approached the psychological level of 161 against the dollar, effectively renewing the 40-year low recorded back in 1986. The current dynamics demonstrate a striking ineffectiveness of traditional tools: neither the tightening of monetary policy by the Bank of Japan (BOJ) nor large-scale currency interventions by Tokyo can stop the prolonged weakening of the national currency.
The key reason for the ongoing pressure on the yen is the colossal interest rate gap between Japan and the United States. On June 16, the BOJ raised its key rate by 0.25 percentage points to 1% — the highest level since 1995. The formal reason was accelerating inflation due to rising commodity prices amid the Middle East conflict. However, this step proved insufficient. Simultaneously, the U.S. Federal Reserve maintained its rate at the previous high level and hinted at the possibility of additional rounds of tightening this year.
Traditional currency interventions no longer work. In May, Tokyo spent about $73.5 billion on a massive purchase of the national currency. The result was short-lived: the yen quickly returned to its decline. This is where the dangerous trap lies, as pointed out by analyst @nicrypto. Japan's sovereign debt far exceeds its GDP, and a sharp rise in rates makes servicing it prohibitively expensive. The BOJ is forced to act very cautiously, and the modest increase to 1% was clearly insufficient for the greedy market.
How this affects the crypto market
The main channel of influence on digital assets is the popular arbitrage on interest rate differences — carry trade. Investors are massively opening short positions on the yen, borrowing cheap yen, converting them into dollars, and investing in high-yield instruments, including tech stocks and cryptocurrencies.
Bitcoin's sensitivity to this factor has been historically proven. Every notable rate hike by the BOJ since 2024 has resulted in a deep drawdown for the crypto market flagship within the range of 20–32%. The June 16 meeting also pushed bitcoin down, but the decline was contained due to the overall weakness of the yen and an important deal between the U.S. and Iran regarding the Strait of Hormuz. As a result, the drop was limited to a symbolic 1%.
However, it is precisely in this local resilience that the main systemic risk lies. While the yen steadily weakens and the regulator hesitates, arbitrage trading continues to fuel the markets. For digital assets, the current situation serves as temporary support. But if the yen sharply rises or the BOJ suddenly accelerates its pace, a massive forced closure of short positions will occur. Such a unwinding of the carry trade in August 2024 already caused panic selling on exchanges, with bitcoin rapidly falling along with stock indices.
My forecast: The longer this imbalance accumulates, the more devastating the inevitable crash of cryptocurrencies and global stocks will be. Investors should prepare for high volatility and consider hedging strategies.