BOJ Hike Triggers Warning Label on Japan's Fiscal Expansion

The Japanese government is pursuing fiscal expansion at a time when investors are becoming increasingly sensitive to the cost of government borrowing, causing the 30-year bond yield to rise.

This phenomenon is significant because it reflects a broader reassessment by investors of the long-term price of carrying Japanese fiscal and inflation risk.

The 25-basis-point rate increase to 1.25% is important, but the rise in ultra-long yields is a more pressing concern for policymakers.

This creates tension between monetary normalization and fiscal expansion, as higher rates make government financing more expensive.