Options Specific Symbol Processing

Cboe has implemented a symbol mapping mechanism for the options Multicast PITCH feeds due to the large size of options symbols and to keep the options Multicast PITCH specification consistent with the equities Multicast PITCH specification. This symbol mapping mechanism significantly reduces the size of the Multicast PITCH feed for options and allows members to use the same feed handler for Cboe equity and options exchanges.

Real-time symbol mapping messages are available on each unit’s multicast feed. Symbol Mapping messages are used to map the 6 character feed symbol (used in all other Pitch 2.X messages) to an OSI symbol and Underlying. Symbol Mapping messages are un-sequenced messages and are sent continuously from pre-market through the end of trading. The rate is variable and will be adjusted as bandwidth allows.

In addition to the symbol mapping events available on the Multicast PITCH feed, a downloadable file with current mappings is available via the Listed Series (csv) link on the Market Data page of the Cboe Options web site.