Current OPRA participants include:
The Securities Industry Automation Corporation (SIAC) gathers the last sale and quote information from each of the participant exchanges. SIAC then consolidates and disseminates that data to approved vendors.
The OPRA data feed provides:
SIAC is responsible for the OPRA systems and networks. CBOE serves as the OPRA administrator.
A significant gauge of the level of options market data is messages per second (MPS). Messages per second is just that - the number of messages (i.e., options trade and quote data) reported to OPRA by the options exchanges during any given second of a trading day.
data has been increasing dramatically since the early 1990s and is expected to surpass one million MPS by the end of 2008, as illustrated in the following table.
|January 2008||701,000 (projected)|
|July 2008||907,000 (projected)|
Commentators suggest that there are three underlying causes of the increase:
The OPRA MPS data rates are more than 60 times those seen in the equities market, and options data represents well over 75% of all market data.