Ban-exit long
When a stock comes out of the F&O ban, traders often say the price tends to jump as fresh positions are allowed again. This strategy turns that claim into a testable long-only trade: buy the stock's near-month future at the open of the first session after the ban lifts, but only if the stock is above its 20-day average, and hold it for five sessions with a volatility stop.How it trades
Results
PRE-BUILT · DEFAULTSWhere it made and lost money
With only five trades in the year, no market condition has enough trades to judge. For what it shows: the two trades held while NIFTY stayed within 1% made ₹39,762 together, while the two held while NIFTY fell more than 1% lost ₹65,753, so the broader market's direction mattered more than the ban event itself. Two entries on quiet sessions lost ₹70,641 between them. The stock future moves with the market as well as with stock-specific news, which is why a long-only rule cannot escape a falling week.
About this strategy
- Each morning, check whether the stock was on the F&O ban list in the previous session and is off it today. The list is published the evening before, so this is known at the open.
- Trend filter: trade only if the previous close is above the 20-day simple moving average of the futures.
- At the first tick of that session, buy one lot of the stock's near-month future. No entry on a futures expiry day.
- Place a stop 2 x ATR(14) below the entry price, using the daily ATR as of the previous close.
- If the trade is still open on the monthly expiry, close it at 15:15 and buy the next month's future at the next session's first tick; the stop keeps counting on the whole trade.
- Otherwise exit at 15:15 on the fifth session after entry.
- Separately, every ban exit in the year is logged with its return over the next 1 to 10 sessions, traded or not, so the claim can be judged on all events.
Why traders use it
While a stock is in the ban, no new F&O positions can be opened, so pent-up demand from traders who want in builds up. The common reading is that once the ban lifts, fresh longs and short covering push the price up. It is an event that is published in advance, easy to track, and repeats on the same handful of heavily traded stocks, which makes it an appealing rule to test. The trend filter tries to take only the ban exits that occur in rising stocks.
The year in plain words
On SAIL from 1 Oct 2025 to 30 Sep 2026 with default settings, only five ban exits passed the filters and were traded. Two won and three lost, for a ₹52,828 loss before costs and a ₹67,363 loss after ₹20 per order and bid-ask slippage. The losers were much larger than the winners: the worst trade lost ₹43,804 in June, against a best of ₹35,579. Four trades ended at the five-session exit and one at a monthly roll; the ATR stop was never the exit. Maximum drawdown reached ₹88,407 before costs. Five trades is far too few to prove or disprove the claim, but in this year it did not hold for SAIL.
What the settings do
Risks
- A single stock futures lot can move by more than ₹40,000 in a few sessions, as the worst trade here did.
- Positions are held overnight for up to a week, so gaps on company or sector news cannot be controlled by the stop.
- Ban exits are rare, so a year produces only a handful of trades and the result depends on one or two of them.
- Stocks that go into the ban often are the same ones that may later be removed from F&O, which biases any longer study.
Who it suits
Traders who study event-driven stock futures setups and want to check a market folk claim against data. The large lot value and overnight holds call for substantial margin and a high tolerance for single-trade swings.
Questions traders ask
Do stocks rise after coming out of the F&O ban?
It is a widely repeated idea, but the evidence here is thin. On SAIL in the year to 30 Sep 2026, five filtered ban exits were traded long and three of them lost. The strategy also logs the return after every ban exit, traded or not, so you can read the full event study in the run's output rather than rely on the five trades.
Is the F&O ban exit strategy profitable?
Not in this backtest. From 1 Oct 2025 to 30 Sep 2026 on SAIL it lost ₹52,828 before costs and ₹67,363 after ₹20 per order and bid-ask slippage, with statutory charges excluded. With only five trades this is not strong evidence either way, and past results do not guarantee future ones.
When does a stock leave the F&O ban?
A stock enters the ban when its open interest crosses 95% of the market-wide position limit and stays there until it falls back below 80%. NSE publishes the list each evening for the next session, so the backtest knows at the open that the stock has left the ban.
Why use futures rather than call options for this trade?
Futures move point for point with the stock and have no time decay, so the result shows whether the price actually rose after the ban lifted. A call option would add the effect of premium decay and volatility changes over the five-session hold.