On October 22nd, the SEC granted immediate effectiveness to C2 Options Exchange's proposed modification of Rule 6.12 relating to the C2 matching algorithm. C2 is simplifying Rule 6.12 to allow for 3 choices of matching algorithms: price-time, pro-rata, and price-time with first priority going to public customers and second priority pursuant to the trade participation right. The first two of these options are unchanged. C2 believes that adding the third, which is achievable under existing C2 Rule 6.12 and which is the intended algorithm of choice for the C2 launch, makes C2 matching rules clearer for C2 users. Comments should be submitted on or before November 18, 2010. SEC Release No. 34-63164.