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2026.08.0603:35:00UTC+00Yield Eases at Japan’s 30-Year JGB Auction, Slipping Below 4% Threshold

Japan’s latest 30-year government bond (JGB) auction saw the long-term yield ease, with the cut-off rate slipping below the 4% mark. According to data updated on 06 August 2026, the yield at the auction stopped and reached 3.937%, down from the previous level of 3.993%.

The move marks a modest decline in long-dated borrowing costs for the Japanese government, after the prior auction had brought the 30-year yield just under the psychologically important 4% level. The new result indicates a slight improvement in investor demand for ultra-long Japanese debt, as the market adjusts from the recent peak near 4%.

While the change is incremental, the shift from 3.993% to 3.937% will be closely watched by market participants assessing the trajectory of Japan’s long-term interest rates and the government’s funding conditions at the far end of the yield curve.

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