Is Japan's bond market pricing in an unrealistic future?
Core argument: Japan’s long-end yield curve is the most distorted in the G10, with its 10y10y-vs-10y spread z-score breaching the two-standard-deviation threshold that defines acute stress across the peer group.
The blue lines are my proxy for how “broken” yield curves are at the long end. This is the difference between the 10y10y forward [which is what markets price for the 10-year yield in 10 years’ time] and 10-year yield. I demean this difference and divide it by its historical standard deviation. The resulting z-score measures how unusual the slope of the yield curve is at the long end relative to history. The black line in each chart is the median across all G10 z-scores. The gray shaded area is a two standard deviation confidence interval around the black line. If you’re outside this area, something very worrying is going on. Japan sticks out like a sore thumb on this metric.

