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May 22, 2026 OSE Adjustment and Change on Securities Options (Effective from June 5, 2026)
Beneficiary right splits are scheduled for the underlying securities, as listed below. (effective from June 9, 2026)
In accordance with this, OSE shall adjust the strike prices of option contracts which are based upon these underlying securities on June 5, 2026, the date on which trading starts for shares after the 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 |
| MAXIS S&P500 US Equity ETF | 2558 | divided by ten | multiplied by ten | No Change | 32,900→329,100 | 6,500→65,800 | 300,000→600,000 |
| MAXIS World Equity (MSCI ACWI) ETF | 2559 | divided by ten | multiplied by ten | No Change | 38,000→388,300 | 7,600→77,600 | 300,000→600,000 |
- 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 June 4, 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.).
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