Bitunix Analyst: Japanese Government Bonds Become a New Source of Global Volatility as Foreign Inflows Surge

BlockBeats News, December 9th: foreign investors continued pouring into the Japanese government bond (JGB) market at an unprecedented pace. Their share of trading now reaches 65%—a dramatic jump from just 12% fifteen years ago. With the BOJ reducing bond purchases and the government rolling out large fiscal programs, foreign capital has become the dominant force pushing yields higher and amplifying volatility. Long-dated JGBs, especially 30–40 year maturities, have reached multi-year highs, signaling Japan’s shift from an “ultra-stable market” to a “global exporter of volatility.”

Although domestic institutions still hold over 80% of outstanding JGBs—providing some stability—foreign investors’ high turnover and low stickiness introduce meaningful systemic risk. Rapid outflows could generate cascading stress that spreads into U.S., U.K., and European sovereign bond markets. With inflation still above the BOJ’s 2% target, another rate hike would further fuel global interest-rate volatility.

Bitunix Analyst View:

This week, markets will closely track both the Fed’s rate-cut signals and the foreign-driven momentum in Japan’s bond market. The Fed’s guidance on rates and liquidity, combined with Japan’s increasingly volatile yield environment, will jointly shape short-term global risk appetite.