Yen carry trade risks are mounting as Japan’s currency hits 40-year lows

The Japanese yen is sitting at levels not seen since the mid-1980s, trading around 162 JPY per US dollar as of July 2026. That number sounds abstract until you realize what it means for one of the most popular trades in global finance: borrow cheap yen, invest in higher-yielding assets elsewhere, pocket the difference.

The Bank of Japan has spent $73.5 billion in intervention attempts trying to keep the yen from sliding further. It has not worked in any durable way.

How the carry trade works, and why it keeps everyone up at night

Here is the basic mechanic. Japan has kept interest rates extraordinarily low for decades, making yen borrowing essentially free by global standards. Investors borrow yen, convert it into dollars or other currencies, and park that money in assets with higher returns, whether that is US Treasuries, equities, or increasingly, crypto.

The carry trade works beautifully until the yen strengthens. When that happens, the yen-denominated loans suddenly cost more to repay in foreign currency terms. Investors who are leveraged rush to unwind their positions, selling whatever risk assets they hold to cover.

The BOJ has been raising rates, bringing them to their highest level in roughly thirty years by mid-June 2026. The logic was that higher Japanese rates would narrow the gap making the carry trade attractive, drawing money back into yen and stabilizing the currency. So far, markets have shrugged. The yen has kept falling. Hedge funds have read that resilience as a green light to extend their bearish bets on the currency rather than retreat.

Bitcoin’s uncomfortable seat at this table

Bitcoin has approached the $60,000 level amid the current yen pressure, and analysts have flagged that a return to the exchange rate levels that triggered carry trade chaos in prior episodes could push Bitcoin below that threshold.

Despite the yen sitting at historic lows and the BOJ’s rate hikes delivering less yen-strengthening than the textbook predicted, crypto markets have not seen the sharp derisking that prior carry unwinds produced.

The 2024 episode offered a preview of what the domino sequence looks like. The yen strengthened sharply in a compressed period, leveraged carry positions were unwound at speed, and risk assets including Bitcoin sold off hard.

What investors should be watching

Several conditions could trigger a sudden, sharp yen strengthening. A BOJ policy surprise, a shift in US Federal Reserve language that narrows the rate differential, or a geopolitical event that sends investors toward safe havens including the yen.

For Bitcoin specifically, the $60,000 level is worth monitoring as a near-term reference point. A carry trade unwind that pushed Bitcoin through that level would likely invite a cascade of stop-losses and forced selling that amplifies the initial move.

The $73.5 billion the BOJ has already spent trying to stabilize the yen, without lasting effect, suggests the forces at work here are not small or easily managed.

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