Indegene share price tanks 12% after bumper debut. Buy, sell of hold?

Indegene share price listed on BSE at ₹659.70 whereas it listed on NSE at ₹655 apiece

Indegene share price tanks 12% after bumper debut. Buy, sell of hold?
Indegene share price listed on BSE at ₹659.70 whereas it listed on NSE at ₹655 apiece