Market News
Feb. 06, 2026 OSE Single Stock Options Recorded All-Time Highs in Average Daily Notional Amount and End-of-Month Open Interest (January 2026)
Osaka Exchange, Inc. (OSE) is pleased to announce that the average daily notional amount and end-of-month open interest for Single Stock Options (SSOs) in January 2026 were approximately JPY 4.8 billion and 371,124 contracts respectively. Both figures marked the highest levels since the derivatives markets of OSE and Tokyo Stock Exchange, Inc. (TSE) were integrated in 2014.
Since the issues eligible for market making were expanded in September 2025, trading in SSOs has continued to increase. This trend has been driven by such factors as brisk trading in TSE’s equity market, an increase in investors who utilize listed companies’ earnings announcements and other investment materials in order to trade SSOs, and a wider range of investors trading SSOs.
Notional Amount of Single Stock Options Trades in October 2025 Hits Post-Integration High for Second Consecutive Month
SSOs as a New Form of Stock Investment Achieve Highest Ever Trading Volume in 2025
Trading Rankings (Notional Amount-Based)
The underlying securities of the top ten SSOs traded in January 2026 are listed in the table below.
| Code | Underlying Security | Notional Amount Traded |
| 1321 | NEXT FUNDS Nikkei 225 Exchange Traded Fund | JPY 13.1 billion |
| 6758 | SONY GROUP CORPORATION | JPY 7.3 billion |
| 8035 | Tokyo Electron Limited | JPY 6.1 billion |
| 6861 | KEYENCE CORPORATION | JPY 5.8 billion |
| 7011 | Mitsubishi Heavy Industries,Ltd. | JPY 4.8 billion |
| 9984 | SoftBank Group Corp. | JPY 4.7 billion |
| 6501 | Hitachi,Ltd. | JPY 4.2 billion |
| 8306 | Mitsubishi UFJ Financial Group,Inc. | JPY 4.2 billion |
| 8316 | Sumitomo Mitsui Financial Group,Inc. | JPY 3.7 billion |
| 7203 | TOYOTA MOTOR CORPORATION | JPY 3.5 billion |
For Reference (More on the SSO market)
Please utilize the following links for more information on the SSO market:
Options Quotes for SSO
Japan's Single Stock Options Markets Primed for Revitalization after Regulatory Improvements
OSE will continue its efforts to improve efficiency in the SSO market in order to meet the needs of market stakeholders.
Contact
Osaka Exchange
TEL:+81-6-4706-0800 (Operator)