Joined: Apr 18, 2018
Posted: May 19, 2018 02:46 PM
Msg. 1 of 2
I'm doing some simulations and I can't see any daily options data before 2011. Am I doing something wrong, or there are no options data before 2011?
Edited by ovolansky on May 19, 2018 at 04:42 PM
Joined: Apr 25, 2006
Posted: Yesterday @ 09:29 AM
Msg. 2 of 2
That is correct, around that time we switched to the OSI symbol standard. Prior to that, symbols were reused and old data was deleted.