PRIME Summary April 2015

MIAX Options

Description

Improvement Spread Average  Average  Average  Percent of  Percent of  >.30,  >.40,  Total Contracts  0 0.01 0.02 0.03 0.04 0.05 >.05, <=.10 >.10, <=.20 >.20, <=.30 >.50 Number of  order  contracts  <=.40 <=.50 Traded Participants initiator  initiator  receives receives    0.02                                1                      â€                        â€                        â€                       â€                       â€                       â€                   â€                   â€                  â€                 â€                 â€                        126  2 88.89% 88.89% Order>=50Ctx !@NBBO Non‐Cust 21 .