December 12, 2016 16:57:43
Post Mortem: Bats EDGX Options System Issue on December 12, 2016
SCI System(s) Affected: Trading
Incident Description: System Disruption - At 15:11:43PM ET, EDGX Options experienced an issue related to processing Risk Management cancellation requests that resulted in a Matching Engine failure affecting trading in underlying symbol range HUM - IPAAZ. Initially, some Members may have experienced momentary rejects in underlying symbol range IPAB - PCLMZ as well.
All stuck orders were resolved by 16:16:51 PM ET.
Members Affected: All Members trading in impacted ranges.
Corrective Action: Bats has identified the issue as being related to a recently enabled performance configuration parameter. This parameter has been disabled until the root cause has been addressed and fully tested.
Bats Trade Desk