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In order to enhance convenience of indices as benchmarks, revisions will be made to the rules in the Index Guidebook when listed companies of TSE index constituent issues carry out stock-swaps or absorption-type mergers. Contents of the changes and revisions are as follows.
1. Cases for application of revisions
A TSE index constituent issue* is delisted due to a stock-swap or an absorption-type merger in which a listed company of another TSE index constituent issue is a surviving company.
2. Details of revisions
Days for making adjustments to the indices in conjunction with mergers, etc. (i.e. days for changing the number of listed shares of the surviving company used for indices) shall be revised as follows.
| Issue Attribute and Section | Absorbed Company | ||||
|---|---|---|---|---|---|
| 1st Section | 2nd Section / Mothers / REIT | Other Markets | Unlisted | ||
| Surviving Company | 1st Section | De-listing date of non-surviving company | One business day before additional listing date | One business day before additional listing date | One business day before additional listing date |
| 2nd Section /Mothers / REIT | One business day before additional listing date | One business day before additional listing date | One business day before additional listing date | ||
| Issue Attribute and Section | Absorbed Company | ||||
|---|---|---|---|---|---|
| 1st Section | 2nd Section / Mothers / REIT | Other Markets | Unlisted | ||
| Surviving Company | 1st Section | De-listing date of non-surviving company | De-listing date of non-surviving company | One business day before additional listing date | One business day before additional listing date |
| 2nd Section /Mothers / REIT | De-listing date of non-surviving company | De-listing date of non-surviving company | One business day before additional listing date | ||
3. Implementation Date
The revisions shall be implemented on cases where stock-swaps and mergers, etc. are carried out on or after Monday, February 1, 2010.
