Lead

In the first quarter of 2026, Japanese investors dumped $29.6 bn of U.S. Treasury, agency and local‑authority debt, the largest quarterly net sale since the second quarter of 2022. The sale pushed the 10‑year U.S. Treasury yield above 2.6% and the 30‑year yield to 4%, tightening global liquidity and adding a new macro headwind for bitcoin, which traders now face higher risk‑free returns.

Background

Japan has long been the world’s largest foreign holder of U.S. Treasuries, with holdings of $1.24 trillion as of February 2026. The Bank of Japan (BOJ) had kept domestic yields near zero by purchasing Japanese government bonds (JGBs) at a capped rate, forcing Japanese institutions to seek income abroad. When the BOJ reduced its monthly JGB purchases from ¥5.7 trillion in August 2024 to ¥2.9 trillion in the first quarter of 2026, domestic yields rose, prompting a shift in capital flows toward U.S. debt. Bitcoin’s performance is closely tied to Treasury yields because higher risk‑free rates make cash and bonds more attractive relative to speculative assets.

What Happened

Japanese investors sold $29.6 bn of U.S. debt in Q1 2026, roughly 2.4% of the country’s $1.24 trillion Treasury holdings. The sale coincided with an abrupt shift in Federal Reserve rate expectations after a jump in oil prices, which made existing Treasury positions less attractive. The 10‑year Treasury yield climbed above 2.6%, its highest level since 1997, while the 30‑year yield hit 4%. The BOJ’s policy shift, including a reduction in JGB purchases and a raised core inflation outlook to 2.8%, further weakened domestic demand for JGBs, reinforcing the outflow of capital to U.S. Treasuries. Reuters reported that Japanese investors continued selling foreign bonds in April, though the pace slowed to a three‑month low. The OECD’s 2026 Global Debt Report projected gross borrowing across OECD countries at around $18 trillion, with net borrowing near $4 trillion, the second‑highest on record. Long‑term G7 borrowing costs have surged to their highest level in more than two decades, with the 30‑year U.S. Treasury yield reaching 5% in late April and the 10‑year yield rising to 4.54% in mid‑May, its highest level in 12 months.

Market & Industry Implications

  • Higher Treasury yields increase the opportunity cost of holding Bitcoin, potentially capping its upside as investors shift to safer assets.
  • Elevated U.S. yields may tighten liquidity across mortgage rates, corporate borrowing costs, bank balance sheets, collateral markets, and emerging‑market debt.
  • Citigroup warned that JGB volatility alone could force risk‑parity funds to sell as much as $130 bn in U.S. bonds, further pressuring yields.
  • The BOJ’s potential rate hikes could make domestic JGBs more attractive, strengthening the repatriation logic and tightening U.S. Treasury demand.

What to Watch

  • Upcoming BOJ policy meetings and any further rate hikes, which could shift capital back to Japan.
  • Fed policy decisions and the probability of a rate hike by December 2026, currently at 44% according to CME FedWatch.
  • Monthly JGB purchase levels and domestic yield movements, as they influence Japanese outflows.
  • Quarterly U.S. Treasury issuance and demand data, which will indicate whether the outflow trend continues.