Last-30-minute expiry sell
This expiry-day strategy sells NIFTY weekly options in the last half hour of their life. Thirty minutes before the close on the Tuesday expiry, it sells the first call at least 1% above the current forward price and the first put at least 1% below it, then lets them expire. The bet is simple: NIFTY rarely moves 1% in the final 30 minutes, so these options usually finish worthless.How it trades
Results
PRE-BUILT · DEFAULTSWhere it made and lost money
Before costs every condition made a little money in this test, because NIFTY almost never moved 1% in the final half hour. The amounts are tiny: entries after normal-VIX evenings made ₹1,190 over 25 expiries, flat openings ₹1,475 over 37, and expiries with NIFTY below its 20-day average ₹1,537 over 24. Calm evenings with India VIX below 11.5 were the weakest, with an 83% win rate over 12 trades, as premiums that far out were thinnest. The real story is cost: with a few paise of premium per option, ₹20 per order and the spread outweigh the gain.
About this strategy
- Trade only on the NIFTY weekly expiry day, which is Tuesday.
- Thirty minutes before the session close (15:10 under the 15:40 close), read the expiring series' forward price.
- Sell one lot of the first listed call at or above forward + 1%, and one lot of the first put at or below forward − 1%; skip a side priced under ₹0.10.
- Each leg has its own stop: buy it back if its price reaches twice the sale price.
- Otherwise hold both to the session's last print, standing in for settlement. There is no target and no re-entry.
Why traders use it
Options 1% out of the money with half an hour left need an unusually sharp move to end in the money, so the probability of keeping the premium is very high. The trade is short and mechanical, and it frees the trader from managing a position through the day. It is popular among expiry-day sellers as a quick, high-win-rate way to collect the last bit of time value.
The year in plain words
On NIFTY weekly expiries from 1 Oct 2025 to 30 Sep 2026, the strategy traded 52 times and won 50, a 96% win rate, for ₹2,143 before costs. Gains were tiny: the average win was ₹44, because premiums 1% out with 30 minutes left are often a few paise. Only one leg hit its 2x stop and the rest expired. After ₹20 per order and bid-ask slippage the result turns into a ₹2,604 loss, with only 10% of trades profitable. This is a clear case of a near-certain small gain that costs more to capture than it pays.
What the settings do
Risks
- Costs exceed the typical premium, so the strategy lost money after ₹20 per order and bid-ask slippage.
- A rare 1% move in the last half hour can cost many weeks of tiny gains, and stops may fill beyond 2x in a fast market.
- Options that expire in the money attract STT on their intrinsic value, which is not included here.
- Naked short options need margin far larger than the few rupees of premium collected.
Who it suits
Traders studying expiry-day behaviour who want to see how a 96% win rate can still lose money once costs are counted; it needs option-selling margin for a very small reward.
Questions traders ask
Does NIFTY move 1% in the last 30 minutes of expiry?
Rarely. In this test only one of 52 expiry-day trades saw a leg reach its 2x stop. That is why options 1% away with half an hour left are priced at just a few paise.
Is selling OTM options in the last 30 minutes of expiry profitable?
Before costs it made ₹2,143 from 1 Oct 2025 to 30 Sep 2026 and won 96% of trades. After ₹20 per order and bid-ask slippage it lost ₹2,604, because the premium collected is usually smaller than the cost of trading. Past results do not guarantee future ones.
Why does a 96% win rate still lose money?
Each winning trade earned about ₹44 on average before costs. Two orders at ₹20 each plus the bid-ask spread on cheap options cost more than that, so most trades end slightly negative once costs are counted.
What price is used for settlement?
Real settlement uses an average of the final half hour. The backtest uses the session's last traded price as a stand-in, so trades close to a strike may differ slightly from actual settlement.