Largest Reform in TOPIX History: Around 680 Stocks May Be Removed
nashnova research
Japan Exchange Group will unveil the largest constituent shakeup in Topix history — roughly 680 stocks face removal while about 35 join — with some $1.1 trillion in passive assets tracking the index, meaning deleted names will face mechanical selling pressure.
What exactly is changing?
The second phase of the Topix overhaul will drop about 680 companies and add roughly 35, including McDonald's Holdings (Japan) and Ferrotec.
New criteria weigh annual turnover ratio and free-float market cap. This means → thinly traded, small-float stocks are first in the firing line.
Phase one ended in January 2025, trimming constituents from about 2,200 to 1,700. After this round, the count could fall below 1,000 within two years.
What happens to deleted stocks?
Removed stocks will not exit immediately. Their index weight will be cut quarterly through July 2028.
In plain terms = it is a gradual phase-out, not a sudden drop — giving the market time to digest.
Companies that meet the criteria again at an October 2027 reassessment can halt the exit process — in effect, a second chance.
From October 2028, Topix will shift to a once-a-year regular rebalance.
Why does $1.1 trillion in passive money matter?
Daiwa Securities chief quant analyst Junichi Hashimoto estimates passive assets tracking Topix at roughly ¥166 trillion (about $1.1 trillion).
This means → deleted companies face rules-based selling by index funds — not a bearish call, but a mechanical mandate to sell.
Conversely, newly added constituents gain steady passive buying and enter active managers' screening universe.
Will this force Japanese companies to change?
Hiromi Ishihara, head of equity investment at Amundi Japan, calls the cut "fundamentally positive" — companies increasingly need to prove their place in the index.
She notes several small-caps have already boosted shareholder returns to avoid deletion, pushing their shares higher.
The real question: are these moves temporary props for the stock price, or genuine improvements in corporate governance and enterprise value?
This reflects the reform's core variable — short-term gaming versus long-term governance upgrade — and the market has no definitive answer yet.
What does it mean for investors?
Tokai Tokyo Intelligence Laboratory analyst Shota Sando warns that investors will keep watching small-cap deletion risk — "the tilt toward large-caps may intensify further."
This means → capital in Japan's equity market may flow even more heavily from small-caps into blue-chips, deepening the structural divide.
In plain terms = stocks that stay in the index passively attract money; those removed face outflows — the index overhaul itself is reshaping Japan's market landscape.
市场有风险，内容仅供研究参考，不构成投资建议。