Eligible Classes

FLEX can trade on any certified underlying product (Equity, ETF, or Index). The product does not have to be listed on any other options Exchange (standalone FLEX). FLEX products are defined by a set of attributes including the underlying instrument, the exercise style, and the settlement style. FLEX OSI Root names use a numeric value to identify Settlement/Exercise combinations along with underlying product symbol.

FLEX OSI Root names for Asian and Cliquet products use a numeric value to identify Settlement/Exercise combinations along with an abbreviated underlying product symbol. This is done to accommodate additional information in the FLEX product symbol. The Asian and Cliquet product symbol abbreviations are listed in the following sections.

FLEX OSI Root names can be pre-defined prior to the start of trading for everything other than Asian and Cliquet names. Asian and Cliquet OSI Roots will be added as needed based on incoming orders and trades of those FLEX products.