Please be advised as of the 3:00 pm CT market close, Cboe C1 Options Exchange had reached 98% of the maximum allowable sequenced messages on its Multicast PITCH proprietary market data feeds for Matching Unit 34 supporting SPXW.
Should this limit be exceeded during post market trading, Cboe is prepared to take actions to continue trading in SPXW as indicated in this previous notice. Subsequent notification will also be sent.
In addition, should this limit be exceeded the C1 proprietary TOP and PITCH market data feeds for the SPXW simple order book will become unavailable for the remainder of the day. SPXW simple order book PITCH/TOP market data will remain available to market participants via OPRA; SPXW proprietary complex order book market data and COA market data will also remain available and unaffected.
Note that this issue only impacts SPXW market data; all other systems not related to SPXW market data, including all systems supporting SPX, continue to operate normally. Note also that Cboe does not intend to close trading early in SPXW or any other classes today, nor are there plans to cease floor trading for SPXW or any other class.
As indicated in a previous notice, Cboe has identified a limitation in the number of available sequenced messages on the C1 Multicast PITCH proprietary market data feeds for Matching Unit 34 supporting SPXW. This is a result of all proprietary Cboe market data feeds supporting a four (4) byte decimal sequence number which has a maximum value of 4,294,967,295.
Please contact the Cboe Trade Desk or your director of sales with any questions.
Cboe Trade Desk