How is SIAC involved with OPRA?
The OPRA committee selected the Securities Industry Automation Corporation (“SIAC”) as the facility for gathering the last sale and quote information from each of the participant exchanges and consolidating and disseminating it to approved vendors. All of the transactions executed on, and price quotations for options generated by, each options exchange are communicated to the public by OPRA through the facilities of its exclusive processor, SIAC. The messages are sent to OPRA and distributed to market data vendors on a consolidated basis for use by options market participants, including retail investors, broker-dealers, and the exchanges themselves. Back to FAQ’s 4.
