The Bank of Japan left its benchmark interest rate unchanged at 1% on July 31, a decision that keeps the yen carry trade alive for now — but also keeps crypto markets on edge. Japan's financial system has run on near-zero rates for over three decades, and the cheap yen has fueled a massive carry trade where investors borrow in Japan to buy higher-yielding assets abroad, including US Treasuries, tech stocks, and Bitcoin. Bitcoin traded near $64,000 following the decision, up about 9% over the past 30 days but down roughly 18% over three months.
Why the BOJ held steady
Raising rates would risk losses for banks, insurers, and pension funds holding low-yield bonds, and would increase refinancing costs on Japan's enormous public debt — one of the largest among developed economies. The BOJ has become the biggest single buyer of its own bonds. Keeping rates low, however, weakens the yen and raises import costs on energy and food. Wage growth in Japan has exceeded 5%, a level not seen since before the country's deflationary period, but the central bank chose not to act. The US Federal Reserve also held rates steady the same week, at 3.50% to 3.75%.
The carry trade and crypto
The cheap yen has been a quiet tailwind for crypto markets. Investors borrow yen at near-zero cost and put the money into higher-yielding plays — Bitcoin among them. But a fast unwind of the carry trade would force selling of foreign assets to repay yen loans, triggering a chain reaction: foreign assets sold, yen bought, yen strengthens, more leveraged positions forced to close. That scenario is what keeps traders watching Tokyo. Analyst Ted Pillows has argued that rising Japanese bond yields were already making the carry trade less attractive, reducing money flow into cryptocurrencies. Market commentator Hupzy suggested prolonged yen weakness could continue supporting demand for Bitcoin and stablecoins, but warned that sudden intervention by Japanese authorities could trigger short-term liquidations in crypto markets.
What analysts are watching now
Analyst EGRAG CRYPTO advises monitoring the yen, Japanese government bond yields, BOJ policy decisions, and capital flows for signs of change in Japan's monetary system that could affect Bitcoin and digital assets. The BOJ's next policy meeting is scheduled for September. Until then, the carry trade grinds on — but the risk of a sudden snapback hasn't gone away.
