Japan Begins Major Topix Overhaul with $60 Billion in Passive Trades Expected

Key Facts

1Japan begins its largest-ever Topix index overhaul on October 30, with $60 billion in passive trades expected.

2The index is projected to shrink from 1,669 members to approximately 986 by mid-2028 based on liquidity tests.

3Kioxia is expected to see inflows of around $13 billion as its weighting in the index is set to rise.

Japan begins its largest-ever Topix index overhaul on October 30, with Bloomberg reporting that $60 billion in passive trades are expected during the rebalancing. According to the Japan Times, the index is projected to shrink from 1,669 members to approximately 986 by mid-2028 based on liquidity and free-float tests. The Tokyo Stock Exchange is implementing these changes to transform the Topix into a leaner, more investable benchmark while encouraging improved corporate governance.

The stock 285A.T closed at 12,605 JPY on October 27, 2026, ahead of the restructuring which will occur in eight quarterly steps starting in January 2027. Kioxia is expected to see inflows of around $13 billion as its weighting in the index rises, while the 683 culled stocks face steady selling pressure through October 2028.

The Bank of Japan is scheduled to announce its Interest Rate Decision and release the Monetary Policy Statement on October 30, 2026, coinciding with the index changes. Investors are also awaiting the Quarterly Outlook Report due on the same day for further economic guidance.

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