
The yen jumped 2% on intervention talk, reviving memories of the August 2024 carry trade unwind that hit Bitcoin. Traders are watching USD/JPY for signs of a broader de-leveraging.
The Japanese yen jumped 2% against the dollar, its biggest single-day gain since Tokyo intervened in April. The move is reviving memories of the August 2024 carry trade unwind that sent Bitcoin and Ethereum tumbling.
The rally followed fresh warnings from Japanese officials about excessive yen weakness. The Ministry of Finance spent ¥11.73 trillion ($73 billion) in April and May alone to support the currency. Those interventions were the largest on record.
The carry trade relies on borrowing yen at near-zero rates to buy higher-yielding assets. The Bank of Japan raised its policy rate to 1% in June, making those loans more expensive. When the yen strengthens, funding costs rise and leveraged positions get squeezed.
A sharp yen rally forces traders to sell risk assets to repay yen-denominated loans. The August 2024 episode saw global crypto market cap shed roughly $500 billion in two weeks, according to CoinMarketCap data. Bitcoin dropped about 27% from its peak during that unwind, crypto analytics firm Kaiko said at the time.
The yen had been trading near 162.3 to 162.9 in late July, levels not seen since the 1980s. That extreme weakness made the carry trade crowded. A 2% reversal in a single session suggests positioning is vulnerable, traders said.
Bitcoin and Ethereum are exposed because crypto exchanges offer margin trading funded with yen. The August 2024 precedent shows how quickly a yen spike can cascade into digital asset selloffs.
The yen's rally left USD/JPY at 159.20 late Friday. The pair's next test will come if the BOJ signals further tightening at its September meeting.
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