Out of curiosity, why do some futures symbols use the @ and others use the Q on C2?
It’s just a legacy of the way we developed our back-office. As you probably know, the world of futures has historically not had standardized symbology (i.e. Bloomberg symbols have been slightly different than Reuters, etc.) This contrasts to the world of stocks, where the symbol for IBM is “IBM” – no matter where you look it up.
This lack of standardization in futures is changing, and symbols are converging, but there are still differences due to history.
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