Thank you for your inputs.
Marcos, I meant: eg. the ticker for CME corn is C. I wish to build a database containing all the current contracts, that is CH13, CK13, CN13 ... as well as many closed contracts as possible CZ12, CU12, CN12, .....
Anyway, what is the trick in BBG to retieve closed future contracts (as in Rrts one uses the '^`)?
Thank you
Édouard