Recently, the Japanese yen has been rapidly appreciating, with USD/JPY falling to around 152, and it has been declining for several days. I looked at the data, and this is mainly because the Bank of Japan might raise interest rates, combined with the market's easing concerns about the Japanese economy, so the yen continues to strengthen. Imagine how much 10,000 yen can buy in RMB; this exchange rate is changing every day, and yen appreciation means it will cost more RMB to buy yen.

Even more interesting is that hedge funds are now betting on the yen continuing to appreciate. According to options data, the trading volume of put options on USD/JPY is 50% higher than call options, indicating a very consistent market expectation. This makes me think of a risk—a large-scale arbitrage trade might be closed out. Simply put, some people previously borrowed yen to buy U.S. stocks to earn interest rate differentials; now that the yen has appreciated, they need to sell assets to pay back debts, which will further push up the yen.

Research institutions warn that once this wave of position unwinding starts, due to its large scale, the yen could strengthen very sharply. From a technical perspective, USD/JPY has already broken below the 100-day moving average. If it continues downward, it could head toward the 150 level, where the 200-day moving average lies. This could put pressure on tech stocks because the yen and the Nasdaq 100 index are negatively correlated. It feels like the story of yen appreciation has just begun, and there may be big moves ahead.