Upcoming Nikkei 225 additions
Funds must own every addition by the effective close; this register tracks the window. Data as of Sep 15, 2026.
120days
until the Nikkei 225 announcement. Nothing is pending right now.
Pencilled in for Mar 2, 2027, typical window
Pending entries
Announced, not yet effective
| No. | Stock | Days left | Since announced | Date effective | Date announced | Replaces |
|---|---|---|---|---|---|---|
| No entries pending as of Sep 15, 2026. New announcements are entered here automatically, with a countdown to the effective close. | ||||||
Most recent entries
Returns measured from the effective-date close
| No. | Stock | Run-up 30d | 1W | 1M | 3M | 6M | 1Y | Date effective |
|---|---|---|---|---|---|---|---|---|
| No entries recorded yet. | ||||||||
Losses are entered in red. A blank cell means that window hasn't elapsed yet.
About the Nikkei 225
Nikkei Inc. selects the Nikkei 225 from eligible stocks on the Tokyo Stock Exchange Prime Market. The methodology considers trading liquidity and aims for balance across industry groups; it is not simply the 225 largest companies by market capitalization. Unlike most other indexes tracked here, the Nikkei 225 is price-weighted, with adjustments to keep share-price differences and corporate actions from mechanically distorting the calculation.
Periodic constituent reviews take place in April and October, with results normally announced in March and September respectively. Delistings and other extraordinary events can cause replacements outside those reviews. A notice around a month ahead is a typical window, not a guaranteed lead time for each entry; the individual stock record is the source for its actual dates when available.
Japanese funds such as 1321 and 1330 track the Nikkei 225. Its price-weighted construction means that a stock's effect on the index does not follow its market capitalization in the same way as in the S&P or FTSE families. That distinction matters when comparing a newly added stock's return with the Nikkei benchmark: the index's weighting method and the stock's own performance answer different questions.
What usually happens after the bell
Across 0 tracked Nikkei 225 additions
| Window after close | Average | Median | Finished higher | vs Nikkei 225 |
|---|---|---|---|---|
| 1W | — | — | Not yet elapsed | — |
| 1M | — | — | Not yet elapsed | — |
| 3M | — | — | Not yet elapsed | — |
| 6M | — | — | Not yet elapsed | — |
| 1Y | — | — | Not yet elapsed | — |
| Run-up, 30 days before the close | — | Average move into past inclusions | ||
How Nikkei 225 additions work
Nikkei reviews constituents in April and October; results are typically announced in March and September. Stocks may also be removed ad hoc on delisting or designation to the liquidation post. A change is announced first and only takes effect after the close on the effective date. Between those two dates, every fund tracking the index (1321.T, 1330.T, EWJ) has to buy the incoming stock, which is why the window matters to traders.
What happens to a stock after it joins Nikkei 225
Inclusion is often described as a guaranteed pop. The tracked history is more mixed: . Returns are measured from the effective close and can also be viewed against the index itself, so a rising market doesn't get counted as an inclusion effect.
When are Nikkei 225 changes announced?
Semi-annual reviews (April / October) + extraordinary deletions. Scheduled review, announcement and effective dates for the next twelve months are listed on the index review calendar. Ad hoc changes — a takeover, a bankruptcy, a fast-track promotion — are announced outside that schedule, usually with a few days' notice.