Below is the expiry day trade taken.
BN spot @ 26640
Buy BN 26700 PE 600 Qty @ 93
Sell BN 26600 PE 1200 Qty 44
Buy BN 26500 PE 600 Qty @ 16
Net Debit = 93 + 16 -88 = 21*600 = around 13K
BN spot @ 26640
Buy BN 26700 PE 600 Qty @ 93
Sell BN 26600 PE 1200 Qty 44
Buy BN 26500 PE 600 Qty @ 16
Net Debit = 93 + 16 -88 = 21*600 = around 13K
BN spot @ 26490
BN 26700 PE 600 Qty @ 185
BN 26600 PE 1200 Qty 105
BN 26500 PE 600 Qty @ 50
Net credit= 185+50 - 210 = 25*600 = 15K
Net profit = 2K