Market News
Sep. 12, 2025 OSE Adjustment and Change on Securities Options (Effective from September 29, 2025)
Stock splits are scheduled for the underlying securities, as listed below. (effective from October 1, 2025)
In accordance with this, OSE shall adjust the strike prices of option contracts which are based upon these underlying securities on September 29, 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* |
| DAITO TRUST CONSTRUCTION CO.,LTD. | 1878 | divided by five | multiplied by five | No Change | 6,800→34,400 | 1,300→6,800 | No Change |
| NIPPON STEEL CORPORATION | 5401 | divided by five | multiplied by five | No Change | 107,400→537,300 | 21,400→107,400 | 30,000→300,000 |
| IHI Corporation | 7013 | divided by seven | multiplied by seven | No Change | 15,400→108,200 | 3,000→21,600 | No Change |
| Nitori Holdings Co., Ltd. | 9843 | divided by five | multiplied by five | No Change | 11,400→57,200 | 2,200→11,400 | 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 September 26, 2025.
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