Appendix A Obvious and Catastrophic Errors During Limit and Straddle States For the month of April 2015, the Exchange collected the following dataset containing the data for each Straddle and Limit State in optionable stocks. Stock Symbol Straddle Limit Indicator Executed Volume TW Avg MBBO Spread TW Avg Quote Bid Size TW Avg Quote Ask Size High Execution Price Low Execution Price Trades Reviewed for Error Price Change GT 30 PCT in LULD Price Change GT 30 PCT After LULD Option Symbol LULD Start Time RCPT RCPT-2015-0417-C-195.00 2015/04/01 15:42:16.004933042 STRADDLE 10 9.72 0.00 10.00 20.70 20.70 N/A 0 0 IMMU IMMU-2015-0515-P-3.00 2015/04/20 15:32:07.411457772 STRADDLE 80 2.21 0.00 15.38 0.20 0.20 N/A 0 0 CRM CRM-2015-0515-C-68.00 2015/04/29 14:40:49.463632457 STRADDLE 10 5.00 9.96 0.07 5.45 5.45 N/A 0 0 .