instrument tokens got reassigned in current options

Somewhere between 8 mar and 15 th mar current ~960 instrument had there instrument token reassigned.

how am i supposed to tally running symbols? for eg. RECLTD19APR160CE instrument token is reassigned to RECLTD19APR149CE

  • rakeshr
    The exchange re-uses the tokens once expired so you can't store tokens for expired instruments.
    We will recommend you to fetch instrument list daily or after every expiry date, check instrument file here.
  • sujith
    Exchanges recycle the tokens and it is random. There is no pattern.
  • raja1sttarde
    @rakeshr thanks for your reply.
    I knew the instrument tokens are valid only for the life of the options, ~3month. here it was reassigned within its life cycle. now am i to understand that instrument token is valid only for a day and it can be re-assigned any time, even within its life cycle?
  • sujith
    It is random and done by the exchange. We just publish whatever we get from the exchange. We have no control over that.
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