Japan just passed a critical test. The country’s 40-year government bond auction on January 28 attracted significantly more demand than expected, with a bid-to-cover ratio of 2.76, well above the previous auction’s 2.585 and the 12-month average of roughly 2.53 to 2.585.
It was the most favorable response since March, and it arrived at a moment when investors were genuinely questioning whether anyone still wanted to hold ultra-long Japanese debt.
What the numbers actually show
Following the auction, the yield on Japan’s 40-year bond dropped approximately 3.5 basis points to around 3.9%. Earlier in January, the same bond had surged to an all-time high of 4.215%, a level that hadn’t been seen in decades and one that sent tremors through global fixed-income markets.
The bid-to-cover ratio, which measures total bids relative to the amount of bonds offered, is effectively a popularity contest for government debt. A ratio above 2.0 is generally considered healthy. At 2.76, this auction didn’t just clear the bar. It vaulted over it.
