Yen's Resilience Hints at End to Decades-Long Funding Machine

The yen's latest recovery is more significant than usual because it held its ground after a strong US payroll report. This suggests that the market is finally testing whether the yen can trade on more than just the daily pulse of US Treasury yields.

For years, the yen was effectively chained to interest rate differentials, with higher US yields leading to a weaker yen almost by reflex. However, valuation stopped mattering as traders knew the yen was unusually cheap due to cheap funding.

The combination of valuation, positioning, and changing Japanese fundamentals is finally pulling in the same direction. Rising Japanese yields could encourage pension funds and other institutional whales to repatriate overseas assets.

Speculation that Norway's sovereign wealth fund might reallocate part of its bond portfolio from US Treasuries to Japanese government bonds has given the market a glimpse of changing global flows. However, the more important flow may come from Japan itself, as its pension funds and insurers hold enormous overseas portfolios accumulated during the long era when domestic yields offered almost nothing.

Rising Japanese yields change this calculation, leaving some domestic bond portfolios carrying losses while their foreign assets retain substantial currency gains. This creates an increasingly powerful incentive to sell dollars, bring money home, and rebalance toward domestic markets.