Japan's Yield Surge Ends 30-Year Era, Shakes Global Markets

Japan's 10-year government bond yield surged to 1.84% on Dec. 1, 2025, its highest level since April 2008, triggering a sharp sell-off in global risk assets and crypto markets. The move, driven by the Bank of Japan's (BOJ) gradual shift away from ultra-loose monetary policy and a ¥21.3 trillion fiscal stimulus package, has disrupted the decades-old yen carry trade - a strategy where investors borrowed cheap yen to fund higher-yielding global assets. The unwinding of this trade has tightened liquidity worldwide, with crypto markets bearing the brunt of the fallout. According to Coinglass, over $640 million in digital-asset positions were liquidated within 24 hours, as Bitcoin and Ethereum fell more than 5% amid a 5% drop in total market capitalization.

The bond yield spike reflects a structural shift in Japan's monetary landscape.

For 30 years, near-zero rates made the yen a favored funding currency for global carry trades, subsidizing investments in U.S. Treasuries, European bonds, and high-beta assets like crypto according to market analysis. Now, with inflation persistently above 2% and swap markets pricing in a likely rate hike at the BOJ's December meeting, capital is beginning to repatriate to Japan. Japanese institutions hold $1.1 trillion in U.S. Treasuries, and rising domestic yields are making overseas investments less attractive. Analyst Shanaka Anslem Perera warned that "the entire post-2008 financial architecture must reprice" as Japan's role as a global liquidity anchor fades.

The timing of the bond market move is particularly challenging for U.S. markets. The Federal Reserve has just concluded its quantitative tightening program, while the Treasury faces record issuance to fund a $1.8 trillion deficit. Meanwhile, China has slowed its purchases. With Japan now pulling liquidity back, global funding costs are rising, pressuring leveraged positions across asset classes. Crypto, as a high-beta market, is often the first to react to liquidity shifts. DeFi analyst "Wukong" noted that "crypto is the highest-risk asset, so even small liquidity changes lead to sharp moves". The recent liquidations underscore how leveraged traders were caught offside by the rapid bond yield rise.

The implications extend beyond crypto. A repricing of global bond markets could tighten liquidity further, with the yen strengthening and carry trades unwinding across equities, commodities, and emerging markets. The BOJ's normalization path, combined with Japan's fiscal stimulus, is likely to keep long-term yields elevated. For now, the Fed's potential response - possibly rate cuts or renewed asset purchases - remains a wildcard that could cushion risk assets in 2026. However, the era of "free leverage" driven by Japan's ultra-easy policy may be ending, marking a pivotal moment for global financial markets.