Hi,
From the forum I have learned the delisted symbol ^, which could apply to future like ESM6, e.g. ESM6^1 uniquely identifies a 2016 expiry future whereas the ESM6^0 uniquely identifies a 2006 expiry future.
Is there a way to uniquely distinguish options using the delisted symbol as well? say for option HCEI09800M7.HF, is there way to distinguish the 2007 options from 2017 one? (tried HCEI09800M7.HF^0 but it doesn't work)