"Event Id"|"Underlying"|"Symbol"|"Exchange"|"Type"|"Start Datetime"|"End Datetime"|"Average Bid Size"|"Average Ask Size"|"Average Spread" "201707073500004"|"ZN"|"ZN_170721C2.5"|"NYSA"|"Straddle"|"20170707 09:50:12"|"20170707 09:50:12"|82|12|2.72 "201707073500005"|"ZN"|"ZN_170721C2.5"|"NYSA"|"Straddle"|"20170707 09:50:13"|"20170707 09:50:13"|61|5|2.42 "201707073500006"|"ZN"|"ZN_170721C2.5"|"NYSA"|"Straddle"|"20170707 09:50:13"|"20170707 09:50:13"|61|5|2.42 "201707073500007"|"ZN"|"ZN_170721C2.5"|"NYSA"|"Straddle"|"20170707 09:50:13"|"20170707 09:50:13"|61|5|2.42 "201707250800001"|"MGM"|"MGM_170818P32."|"NYSA"|"Straddle"|"20170725 15:37:03"|"20170725 15:37:03"|11|9|1.85