Market News
Sep. 15, 2026 OSE Adjustment and Change on Securities Options (Effective from September 29, 2026)
Stock splits are scheduled for the underlying securities, as listed below. (effective from October 1, 2026)
In accordance with this, OSE shall adjust the strike prices of option contracts which are based upon these underlying securities on September 29, 2026, the date on which trading starts for shares after the stock splits.
| Underlying securities | Code | Strike price*1,2 | Open interest*1 | Number of securities for one delivery unit*1 | Position limits*1(units) | Large position reporting threshold for securities options*1(units) | Hard Block for J-NET Trading*1 |
| DAIWA HOUSE INDUSTRY CO.,LTD. | 1925 | divided by two | multiplied by two | No Change | 65,900 → 131,900 | 13,100 → 26,300 | No Change |
| Kioxia Holdings Corporation | 285A | divided by three | multiplied by three | No Change | 54,700 → 164,500 | 10,900 → 32,900 | No Change |
| IBIDEN CO., LTD. | 4062 | divided by two | multiplied by two | No Change | 28,100 → 56,700 | 5,600 → 11,300 | No Change |
| Mitsui Kinzoku Company, Limited | 5706 | divided by ten | multiplied by ten | No Change | 5,700 → 57,400 | 1,100 → 11,400 | No Change |
| TOPPAN Holdings Inc. | 7911 | divided by two | multiplied by two | No Change | 29,400 → 58,900 | 5,800 → 11,700 | No Change |
| Tokyo Electron Limited | 8035 | divided by five | multiplied by five | No Change | 47,100 → 234,000 | 9,400 → 46,800 | No Change |
| Sumitomo Mitsui Financial Group, Inc. | 8316 | divided by two | multiplied by two | No Change | 382,700 → 765,800 | 76,500 → 153,100 | No Change |
| Tokio Marine Holdings,Inc. | 8766 | divided by fifteen | multiplied by fifteen | No Change | 193,400 → 2,901,000 | 38,600 → 580,200 | 30,000→ 300,000 |
- 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 28, 2026.
- If there are odd lots less than one yen in the strike price, they shall be rounded to the nearest yen(For strike prices of flexible options, odd lots less than the second decimal place shall be rounded to the nearest yen.).
Enquiry
Osaka Exchange
TEL:TEL : +81-6-4706-0800