I have been using the `0#ES+` chain ric to get all identifiers for S&P 500 Mini options. However, this only returns options with quarterly expiration, but it would be preferable if I get monthly expiration.
Example:
ES2400C8,ES MAR8 2400 C,EIO,USD,,IOM,XCME,C,2400,2018/03/16,A,,2018/03/16,50,INDEX,ES,ESH8,
ES2400F7,ES JUN7 2400 C,EIO,USD,,IOM,XCME,C,2400,2017/06/16,A,2016/06/20,2017/06/16,50,INDEX,ES,ESM7,
ES2400I7,ES SEP7 2400 C,EIO,USD,,IOM,XCME,C,2400,2017/09/15,A,,2017/09/15,50,INDEX,ES,ESU7,
ES2400L7,ES DEC7 2400 C,EIO,USD,,IOM,XCME,C,2400,2017/12/15,A,2016/12/19,2017/12/15,50,INDEX,ES,ESZ7,
ES2400O8,ES MAR8 2400 P,EIO,USD,,IOM,XCME,P,2400,2018/03/16,A,,2018/03/16,50,INDEX,ES,ESH8,
ES2400R7,ES JUN7 2400 P,EIO,USD,,IOM,XCME,P,2400,2017/06/16,A,2016/06/20,2017/06/16,50,INDEX,ES,ESM7,
ES2400U7,ES SEP7 2400 P,EIO,USD,,IOM,XCME,P,2400,2017/09/15,A,,2017/09/15,50,INDEX,ES,ESU7,
ES2400X7,ES DEC7 2400 P,EIO,USD,,IOM,XCME,P,2400,2017/12/15,A,2016/12/19,2017/12/15,50,INDEX,ES,ESZ7,
these are all options that have quarterly expires. Is it possible to get also options with monthly expires?