Japan’s Bond Market: The Endgame for Sovereign Debt?

Photo by Manuel Cosentino on Unsplash

For years, the Bank of Japan (BoJ) acted as the ultimate backstop of the JGB market — owning 52% of all outstanding government bonds and absorbing a substantial portion of all new issuance. This kept yields artificially low and volatility at bay.

But things are changing — fast.

🔹 Since mid-2024, the BoJ has been tapering its purchases of new debt under a quantitative tightening (QT) plan. 🔹 Long-dated JGB yields (30Y & 40Y) have surged to levels not seen since before the QQE era. 🔹 With true price discovery returning to the JGB market, the long end of the curve is now under severe upward pressure.

Are we approaching a breaking point in the sovereign debt paradigm? When the largest buyer steps back, who will fill the void?

📊 A must-watch story as global markets rethink yield curves and central bank dominance.