Market News
Aug. 14, 2025 OSE Adjustment and Change on Securities Options (Effective from August 28, 2025)
Stock(Investment unit) splits are scheduled for the underlying securities, as listed below. (effective from September 1, 2025)
In accordance with this, OSE shall adjust the strike prices of option contracts which are based upon these underlying securities on August 28, 2025, the date on which trading starts for shares after the stock splits.
| Underlying securities | Code | Strike price* | Open interest* | Number of securities for one delivery unit* | Position limits*(units) | Large position reporting threshold for securities options*(units) | Hard Block for J-NET Trading* |
| AEON CO., LTD. | 8267 | divided by three | multiplied by three | No Change | 87,100→261,500 | 17,400→52,300 | No Change |
| ORIX JREIT Inc. | 8954 | divided by two |
multiplied by two | No Change | 27,600→55,200 | 5,500→11,000 | No Change |
| Daiwa House REIT Investment Corporation | 8984 | divided by two | multiplied by two | No Change | 22,900→45,900 | 4,500→9,100 | No Change |
- Strike price, Open interest, Number of securities for one delivery unit, Position limits,Large position reporting threshold for securities options and Hard Block for J-NET Trading compared to August 27, 2025.
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