The Bank of Japan will increase the pace of its exchange-traded fund sales from January 2027, raising annual disposals by book value to about ¥860 billion from roughly ¥330 billion. Even at the faster rate, clearing the holdings recorded at the end of September would take an estimated 43 years, down from about 112 years. The gradual sales are intended to transfer more equity-market risk to private investors without disrupting trading through concentrated selling.
When the BOJ announced the change on October 30, it kept its overnight interest-rate target at about 1.25%. The rate decision affects current borrowing costs; ETF sales address assets accumulated during earlier monetary easing. The two measures concern different parts of policy: today’s monetary conditions and the unwinding of long-held equity exposure.
How the BOJ built its ETF portfolio
The BOJ added equity ETFs to its monetary-easing toolkit in 2010, when Japan faced weak demand and deflationary pressure. By buying funds that hold baskets of company shares, the central bank sought to encourage risk-taking and improve financial conditions. One policy aim was to reduce the additional return investors demanded for holding riskier assets.
ETF purchases gave the BOJ broad exposure to the stock market rather than direct stakes in individual companies. The added demand could support share prices and encourage investors to accept lower expected returns. With short-term rates already near zero, buying risk assets formed part of the central bank’s easing efforts.
Then-Governor Masaaki Shirakawa also raised concerns in 2010 about potential losses and the effects of deeper central-bank involvement in the allocation of resources among companies and industries. The holdings accumulated over subsequent years did not disappear when the policy ended.
The BOJ stopped making new ETF purchases in March 2024. But unlike individual bonds, ordinary equity ETFs have no maturity date at which principal is repaid. To reduce its holdings, the central bank must find buyers and accept the market’s pricing of future risks. ETF units can change hands among investors without the BOJ immediately selling every underlying share, but buyers still need to absorb the assets being offered.
The BOJ says it will seek an “appropriate price” while avoiding losses and disruption to Japanese markets as far as possible. Faster sales would transfer risk sooner, but require buyers to take on more units each year. Slower sales would leave the central bank exposed to market swings for longer. Disposals began in January 2026, and the BOJ has retained the option to adjust or pause them depending on market conditions.
Annual book-value sales to rise to ¥860 billion
The new annual disposal pace is about ¥860 billion by book value, up from the previous ¥330 billion. Book value refers to the amount recorded on the BOJ’s books for the holdings sold; it is not the cash proceeds the central bank will receive. Based on the relationship between the market and book values of ETFs sold from January through September 2026, the BOJ estimates the new pace would represent about ¥2.46 trillion in market value. That conversion will vary with prices.
| Measure | Previous plan | From January 2027 |
|---|---|---|
| Annual ETF disposals, by book value | About ¥330 billion | About ¥860 billion |
| Share of market trading value | About 0.05% | About 0.1% |
| Estimated time to dispose of end-September holdings | About 112 years | About 43 years |
Using trading data for the Tokyo Stock Exchange Prime Market from January to September 2026, the BOJ estimates sales under the revised plan would amount to around one-thousandth of market trading value. The roughly 161% increase in annual book-value disposals does not mean the central bank plans a concentrated sell-off. Spreading sales over multiple years gives buyers time to adjust their portfolios and allows the BOJ to reassess the pace if market conditions deteriorate.
The BOJ said sales had proceeded smoothly since January 2026, without a significant market impact. It also considered changes in overall trading activity when revising the plan. The 43-year figure is a simple calculation: end-September holdings divided by a fixed annual book-value disposal amount. It is not a forecast of the date the BOJ will finish selling, nor does it mean the market will necessarily need decades to absorb the assets. The actual timeline would change if policy or the sales pace changes.
How yen funding could affect bitcoin indirectly
The BOJ’s ETF disposals are separate from private investors’ funding arrangements. However, changes in yen financing can affect other assets, including bitcoin, through portfolio decisions. Some investors borrow yen to buy dollar-denominated assets without hedging currency risk. If the yen strengthens, those assets may be worth less when converted back into yen. Higher funding costs or tighter collateral requirements could also reduce returns on such trades.
Investors who need cash to repay debt or meet collateral calls may sell other holdings, including bitcoin, potentially affecting assets with no direct connection to the original position. But there is not enough information to establish that this kind of funding pressure is occurring or how large it might be. Evidence of position reductions tied to financing stress would be needed to confirm forced selling. A decline in futures open interest can indicate deleveraging, but does not by itself reveal which currency investors borrowed.
Weekly data published by Japan’s Ministry of Finance for October 18–24, 2026, also do not demonstrate a broad withdrawal by Japanese investors from overseas markets. Investors covered by the statistics were net sellers of ¥92.6 billion in overseas long-term bonds, but bought ¥430.8 billion in overseas securities overall, with purchases in other categories exceeding bond sales. The bond figures alone do not establish that the securities were US Treasuries or that sale proceeds were converted into yen. The data track securities transactions, not investors’ funding needs.
The BOJ’s estimate highlights the long-term portfolio-management task left by past policy intervention: ending purchases does not immediately unwind the assets. Private buyers will gradually take on more equity risk, while the central bank can adjust its sales pace to market conditions. For bitcoin and other assets, the key question is whether investors face financing obligations that force them to sell unrelated holdings.