www.jpx.co.jp/derivatives/rules/flexible/index.html

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フレックス・オプション取引 | フレックス取引 | 日本取引所グループ

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https://www.jpx.co.jp/derivatives/rules/flexible/index.html

About this page

This page explains Flex Options trading offered by Japan Exchange Group. Flex Options are option contracts traded on the J-NET market with flexible contract specifications set upon request. Key features include flexible terms for exercise dates, strike prices, and settlement methods, with same-day execution capability. As listed option contracts, they allow margin offset with other futures and options, and serve as alternatives to OTC trading. Both equity and index options are available with contract periods up to 3-5 years. Settlement can be delivery-based or cash-settled based on closing prices.