You might be wondering why Bitcoin seemed like a wild roller coaster ride in late 2025. It doesn’t seem to be related to the crypto space – it has something to do with Japan. Japan has been the world’s largest lender for thirty years providing speculative capital globally through what we call the “yen carry trade.” And the party is over. The ripples are spreading rapidly throughout the globe and specifically affecting crypto.
Japan Has Turned Off Its Money Machine
The yen carry trade was very easy to understand; it meant to borrow low-cost yen and use it somewhere else to get a better return. However, the rules of the game have changed.
“Free Money” Costs Money
Japan’s Central Bank (Bank of Japan – BoJ) ended its 30-year party by ending its negative interest rates, eliminating its “Yield Curve Control,” and raising its primary interest rate to 0.5%, which is the highest in seventeen years. As a result, Japanese Government Bond (JGB) yields rose to levels not seen since 2008. What made the yen carry trade so appealing disappeared quickly – the large differential in U.S. vs. Japanese interest rates dwindled dramatically in only ten months.
A Double Whammy From The Government
And, to make things much worse, the Japanese government announced a massive ¥21.3 trillion (approximately $135 billion) fiscal stimulus package in early November 2025. With the central bank no longer buying bonds, the bond market will need to absorb all of this new debt, thereby increasing bond yields further and causing additional pressure to unwind the carry trade.
The Carry Trade In Reverse
With borrowing costs in Japan going up, the profit from this trade is quickly being eliminated, and there is a rapid mass movement:
Exit Strategy:
Institutional investors are now losing money and are required to close these trades.
Capital Repatriation:
Japanese investors, with trillions in foreign investments such as U.S. stocks and bonds, are selling them to bring the funds back to invest in attractive domestic bonds.
Global Selling Frenzy:
The world's largest creditor nation has turned from the largest buyer to the largest seller, taking liquidity away from global markets.
How Crypto Gets Affected
So, why does crypto care? Crypto is like the canary in the coal mine for global liquidity. It’s a high beta asset, therefore, it feels these changes more than nearly every other asset.
Here is how it works out:
Liquidity Contraction: That cheap yen that fueled speculation is drying up. Crypto sits at the riskiest end of the spectrum and is the first to feel the withdrawal.
Margin Calls:
Traders who bought crypto using borrowed money to purchase crypto are now getting margin calls on their expensive yen loans. To pay for those margin calls, they sell their most liquid assets - like bitcoin.
Bitcoin As The Emergency ATM:
Because you can sell bitcoin 24/7, it is the default asset for anyone that needs cash quick to cover losses elsewhere. A 10-15 percent increase in the yen’s value could cause a 5-10 percent drop in US stock values, with technology and crypto experiencing a steeper decline.
Stablecoin Uncertainty:
Even stablecoins won’t be immune to this downturn. Many hold reserves of U.S. Treasuries. A huge selloff in crypto would require stablecoin issuers to sell those Treasuries, illustrating how much crypto is linked to the old financial system.
Think of it like this: the global market is a swimming pool. For years, Japan was pouring water into the pool with a firehose (the carry trade). Now, they’ve stopped pouring water and have opened a massive drain at the bottom of the pool. When the water level drops, Bitcoin, floating near the surface, experiences the pressure drop, as everyone rushes to the exit.
Keep your eyes on the USD/JPY exchange rate if you’re tracking crypto price movements. The exchange rate has become one of the best tools to track where the market is heading next.
