I send 4-5 requests for ACTC ticker during 10 minutes:
firs time I receive “options” with full data
second “options” is empty
third option with data but “2021-12-17” strike is missed
on forth time “options” with full data again
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ACTC does not seem to be a valid stock symbol any more. The last active trading date is Sun, Jun 13th, 2021.
Would you please try a different stock to see if you experience same issue ?
Thanks
It working unstable