Limit Up Limit Down Pilot Reports September 2015

MIAX Options

Description

Appendix A Obvious and Catastrophic Errors During Limit and Straddle States For the month of September 2015, the Exchange collected the following dataset containing the data for each Straddle and Limit State in optionable stocks. Stock Symbol Option Symbol Trade Date LULD Start Time Straddle Limit Indicator Executed Volume TW Avg MBBO Spread TW Avg Quote Bid Size TW Avg Quote Ask Size ADXS ADXS-2015-09-18-C17.50 9/17/2015 2:35:23 PM STRADDLE 10 0.92 .3 73.43 High Execution Price Low Execution Price .45 .45 Trades Reviewed for Error Price Change GT 30 PCT in LULD Price Change GT 30 PCT After LULD N/A 0 1 .