hi,
I am just starting off and trying to get some knowledge on option selling and verify, if my understanding is correct. I am going to keep the example with round figures so that calculations are simpler to explain.
Lets say Bank Nifty is currently at 36000 on Monday and I am talking about weekly expiry. I go and sell a deep out of money PUT option with 34200 strike price at premium of Rs 201. Lets say, I sell 4 lots of 25 and I paid brokerage, STT etc of Rs 100. So I get net 20K as premium. Now is it safe that say that until Bank Nifty closes above 34001, I am not losing money?
Above 34200, i get all premium and between 34001 and 34200, I am getting the difference in premium minus difference in strike price and spot price. So if Bank Nifty closes at 34100 on expiry, I still make a net profit of 10K ?
Now lets say, Bank Nifty closes at 33700 on expiry and I have NOT squared off my position. So now my overall loss is premium received (200) - difference in strike price and spot price (34200-33700 i.e 500). So net loss of 300. Since I have 4 lots, I will have net loss of 30K. Is this calculation correct? Now on the buy side, is the STT applied on the spot price or on difference? I am not clear on this front.
In second scenario, lets say Bank Nifty does not move much and closes around 35900 or 36100 on expiry and I have NOT squared off my position. So my PUT options will expiry worthless. Is there any brokerage, STT or any other charges to be paid in this scenario, if I take no action?
Last question is, since I sold the PUT option on Monday, by Wednesday lets say, Bank Nifty is already down to 34800. So the probability of Bank Nifty ending below 34200 has drastically increased. So in such a case, in order to somewhat offset the expected losses, is it better to sell one more out of the money at different strike price (say 34000 or 33800) or is it better sell additional lot at same strike price of 34200, but now at a much higher premium?
I understand that in times like now, when volatility is very high and driven by many external factors, any deep out of money PUT can become in the money in a single day. So loss can increase multifold in a very short time. But during normal times in a sideways market or slightly bullish market, is using this naked deep out of the money short strategy relatively safe with a limited upside potential?
Thanks!