Japan's Government Pension Investment Fund, the world's largest pension fund with $2 trillion in assets, could sell up to $62 billion in U.S. Treasury bonds without requiring a formal asset allocation review, according to Banco Santander analysts.
GPIF's domestic bond allocation reached 27 percent by end of March, exceeding its 25 percent benchmark target. That 2 percent overage provides room for a further 4 percent increase in domestic holdings within existing investment guidelines—the mathematical basis for the potential $62 billion Treasury divestment.
The structural shift matters for yields and currency. TS Lombard analysts predict this capital repatriation will push USD/JPY below 150, toward a 130 to 140 fair value range. The yen is re-linking with interest rate differentials after years of disconnect. The 10-year JGB-UST spread has compressed sharply over two years, yet USD/JPY remained near historical highs—a divergence now resolving as capital flows reverse.
Historically, yen weakness reflected sustained outflows: Japanese portfolio funds and carry trades dwarfed Japan's massive current account surplus. That dynamic is inverting. Capital is flowing back into Japan, becoming the structural driver for yen strength and reducing need for official intervention.
Japan's 10-year government bond yield hit 3 percent last week, the first time since 1996, driven by domestic inflation, fiscal concerns and market expectations for accelerated Bank of Japan rate hikes. TS Lombard forecasts the BOJ will resume quarterly hikes starting January 2027, reaching a 2 percent terminal rate by fourth quarter 2027.
Health, Labour and Welfare Minister Kenichiro Ueno said officials are studying whether a GPIF asset allocation review is necessary, though no formal decision has been made. Societe Generale analysts note that any mandate change could unfold gradually over years. But the underlying capital flows signal a systemic pivot that markets have not yet fully priced, with speculative short positions in the yen still elevated.
