Option expiry

bought 40 lots 8400 CE on expiry day @ 0.10 paisa…as per theory my maximum loss will be (40 lots25qty.10 = Rs 100)…what happens if i dont square off…what charges will be levied by exchange levy(like STT,brokerage and others).can anybody expain how exchanges assigns or square off open positions…

Its fine if the option expired out of the money.

Out of the money for call = where Strike > Spot

If an option is in the money and you don’t square it off and let it expire, the Exchange levies a higher rate of STT. There’s a full fledged blog on Z-Connect which you can read here: http://zerodha.com/z-connect/queries/stock-and-fo-queries/stt-options-nse-bse-mcx-sx