What rollover means, how to compute it, and what high vs low rollover tells you about institutional positioning conviction.
Rollover is the process of closing out an expiring monthly contract and opening a new position in the next month's contract. The rollover percentage measures how much of the expiring OI is being carried forward — a direct gauge of positioning conviction.
Rollover data is most useful during the last 5-7 trading days of each monthly cycle. Daily rollover percentages above 75% signal strong conviction in current positioning; below 60% signals capitulation or profit-taking.
Daily rollover % = OI of next-month contract today ÷ (OI of next-month + OI of current-month) × 100.
Worked example: on the Monday before NIFTY monthly expiry Thursday, current-month NIFTY futures have 75 lakh OI and next-month have 25 lakh OI. Daily rollover = 25 / (25 + 75) = 25%.
By Wednesday, current month has dropped to 30 lakh, next month has risen to 70 lakh. Rollover = 70 / 100 = 70%.
By Thursday close, current month is fully expired and rollover percentage is no longer meaningful for that cycle. Strota tracks daily rollover during the last week of each cycle and publishes the final rollover number after Thursday's expiry.
High rollover (>75%): traders are confident in current positioning and willing to hold it into the next month. Strong directional conviction signal.
Medium rollover (60-75%): typical. Most positioning gets carried forward, with some closure.
Low rollover (<60%): traders are closing positions instead of carrying them. Either profit-taking (if positions were profitable) or capitulation (if losing). Reduced conviction for the next month.
Compare across stocks: a F&O stock with 90% rollover vs the index at 70% rollover means stock-specific conviction is much stronger than broad market conviction.
Rollover isn't free. The next-month contract typically trades at a premium to the expiring one (carry cost). When premium is high, rolling positions forward costs more — high rollover with high cost is an especially strong conviction signal.
Rollover cost = (next-month price − current-month price) ÷ current-month price × 100, annualised by days-to-expiry.
Typical NIFTY rollover cost is 0.3-0.8% per month (annualised: 4-10%). When cost spikes above 1.5% per month, hedging demand is high and rollover may be driven by hedge book maintenance rather than directional conviction.
Probably yes, but check direction first. 82% means high conviction relative to history — institutions are reluctant to close. Combine with FII positioning: if FII long-short ratio is also above its 90-day median, the conviction is bullish and momentum likely continues. If FII is bearish despite high rollover, you have a 'high conviction wrong-way trade' setup — historically correlates with continued downside.
TATA STEEL traders are sticking with their positioning much harder than RELIANCE traders. If both stocks have similar price moves, the relative rollover gap is a real signal — TATA STEEL has stronger institutional commitment. Trade ideas: relative-momentum long TATA STEEL vs RELIANCE for the next month, or take the conviction signal as confirmation of an existing long bias.
The premium between the next-month and current-month contract, expressed as a percentage. Typical NIFTY rollover cost is 0.3-0.8% per month. When cost spikes above 1.5%, hedging demand is high — rollover may be defensive (closing existing protection) rather than directional.
Yes, occasionally. It means next-month OI is larger than current-month + next-month combined as of yesterday — i.e. fresh positions are being opened in next month faster than existing positions are being closed in current month. Very strong conviction signal, especially in the last 2 days before expiry.
Not really — weekly options have a 7-day life so 'rollover' is conceptually different. Most weekly OI either gets settled or closed before expiry rather than rolled. Rollover analysis is specifically a monthly-expiry tool.