Rollover and roll cost signal
Rollover analysis is a monthly ritual in Indian derivatives commentary: on futures expiry, how much open interest moved to the next month, and at what cost? This strategy turns that reading into a rule. When rollover is clearly above its recent average, and the finished series' trend and the roll cost agree, it trades NIFTY futures in that direction for the new series.How it trades
Results
PRE-BUILT · DEFAULTSWhere it made and lost money
There is no market-condition evidence to speak of: the rules traded once in the year. That single trade was a short taken on 1 Apr 2026 after a falling March series with high rollover and a cheap roll; NIFTY rallied in the new series and the 2-ATR stop was hit a week later for a ₹58,487 loss before costs. The case shows the main weakness of the idea. Rollover data describes what traders did in the old series, and a new series that opens with a reversal leaves the trade on the wrong side with a wide stop.
The same trades, split by the market conditions around each entry, before costs.About this strategy
- At the close of each monthly futures expiry day, measure rollover: open interest in the later months as a percentage of open interest in all months.
- Measure roll cost as the gap between next-month and near-month futures, annualised, and the series return from its first session to expiry day.
- Call rollover high if it is more than 5 points above the average of the previous 3 series.
- High rollover with a rising series and roll cost above its 3-series average means go long; high rollover with a falling series and roll cost below its average means go short. Anything else means no trade.
- Place the trade at 09:20 on the first session of the new series, one lot of the new near-month future.
- Stop out at 2 times the 14-day ATR against the entry; otherwise exit at 15:15 on the new series' expiry day.
Why traders use it
Rolling a futures position costs money, so a high rollover suggests traders are confident enough to carry their bets into the next month. A rising series rolled at a richer premium hints that longs are paying up to stay in; a falling series rolled cheaply hints at shorts being carried forward. These figures are published widely every expiry and discussed as a guide to the next month, which is what this strategy puts to a mechanical test.
The year in plain words
Across 1 Oct 2025 to 30 Sep 2026, the full set of conditions lined up only once. After the March 2026 expiry the rules called for a short, entered on 1 Apr 2026; NIFTY rallied and the 2-ATR stop was hit on 8 Apr for a ₹58,487 loss before costs and ₹57,890 after costs. The costed run fills at real bid and ask quotes, and on this one stop exit the quoted fill was about ₹600 better, which outweighed the ₹20 orders. In every other series either rollover was not high enough or the trend and roll cost disagreed. A single trade says almost nothing about the signal, except that it fires rarely and a wrong call costs a full 2-ATR move.
What the settings do
Risks
- The signal is rare, so long gaps without a trade are normal and each trade carries great weight.
- A high rollover on a small open interest base can mean little, and much rollover is hedging rather than a view.
- Positions are held for up to a month with only a wide ATR stop, so one trade can lose a large sum.
- Overnight gaps can jump past the stop.
Who it suits
Traders who already follow expiry rollover data and want to test it as a monthly positional futures signal, with margin for a full lot held for weeks and the patience to go many months without a trade.
Questions traders ask
What is rollover percentage in NIFTY futures?
It is the share of futures open interest held in contracts beyond the near month, measured around expiry. If 80% of all open contracts are in the next and far months on expiry day, most traders have carried positions forward rather than closing them. It is compared with past series to judge whether it is high or low.
What is roll cost?
Roll cost is the premium of the next-month future over the expiring one, here annualised so different months compare fairly. A higher than usual roll cost suggests buyers are paying up to keep long positions; a lower one suggests the opposite.
Is the rollover signal profitable?
In this backtest from 1 Oct 2025 to 30 Sep 2026 it traded once and lost ₹58,487 before costs and ₹57,890 after ₹20 per order and slippage (statutory charges excluded). One trade is far too few to judge the signal, and past results do not guarantee future ones.
Why did the strategy trade only once in a year?
It needs three things together: rollover more than 5 points above its 3-series average, a series trend in one direction, and a roll cost on the same side of its own average. In this period that combination appeared after only one of the twelve monthly expiries.