Foreign institutional investors (FIIs, also called FPIs, foreign portfolio investors) are among the largest traders in Indian markets. Their cash market buying and selling is covered in the FII and DII data guide. This guide is about their derivatives positions: how many index futures and index options they hold, and whether they lean long or short.
The data comes from NSE's daily participant-wise open interest report, published in the evening after the market closes. It splits the total open interest of the futures and options market into four groups of traders.
The four participant groups
- FII: foreign institutional investors: overseas funds, banks and other foreign investors registered to trade in India.
- DII: domestic institutional investors: Indian mutual funds, insurance companies and similar. They are small players in index derivatives, mostly for hedging.
- Pro: proprietary traders: brokers and trading firms trading with their own money. Many are large option sellers.
- Client: everyone else trading through a broker, including retail traders, high-net-worth individuals and corporates.
For each group, the report gives the number of contracts held long and short in index futures, stock futures, index calls, index puts, stock calls and stock puts. Because every contract has a buyer and a seller, the four groups' longs add up to the same total as their shorts.
Reading FII index futures
Index futures are the cleanest view of direction, because a long future gains if the index rises and a short future gains if it falls. Two numbers are used:
Long % = index futures long ÷ (long + short) × 100
Net position = index futures long − index futures short
The site's reading uses simple bands: when FIIs hold 60% or more of their index futures long, the stance is called bullish; 40% or less, bearish; in between, mixed. These are conventions, not thresholds with special meaning.
A worked example
Suppose on one evening the report shows FIIs with 1,20,000 index futures contracts long and 2,40,000 short. On the next evening: 1,45,000 long and 2,10,000 short.
| Day | Long | Short | Long % | Net |
|---|---|---|---|---|
| Day 1 | 1,20,000 | 2,40,000 | 33% | −1,20,000 |
| Day 2 | 1,45,000 | 2,10,000 | 41% | −65,000 |
FIIs are still net short, and the long % is still near the bearish end. But in one day they added 25,000 longs and covered 30,000 shorts, so their net short shrank by 55,000 contracts. That kind of change, especially if it continues for several days, is what traders watch: it often accompanies short covering in the index. A heavily short FII book is sometimes described as "fuel" for a rally, because closing those shorts means buying.
Reading FII index options
For options, the report gives contracts bought (long) and sold (short) for calls and puts separately. The site shows the net for each: bought minus sold.
- Net long index calls or net short index puts: a bullish lean.
- Net long index puts or net short index calls: a bearish or hedged lean.
Options are harder to read than futures. A fund holding a large Indian stock portfolio may buy index puts purely as insurance, which looks bearish but is not a bet on a fall. Option positions also include spreads, where a fund buys one strike and sells another; the net counts both.
Reading the trend over weeks
A single evening's figure is rarely enough. Traders usually keep an eye on three things over several sessions:
- Direction of the net position: is the FII net index futures position growing more long (or less short) day after day, or the reverse? A steady run of additions in one direction says more than one large jump.
- Extremes: when the long % sits at the far ends of its range (for example below 20% or above 75% of contracts long), the position is stretched. Stretched short positions have often been followed by sharp short-covering rallies, because closing them requires buying.
- Agreement with price: FIIs adding longs while NIFTY rises fits a healthy trend. FIIs adding shorts while NIFTY rises means they disagree with the move, or are hedging growing cash holdings.
Writing the figures down for a few weeks, or using the history on the FII and DII page, makes these patterns easy to see. The page also shows the net change since the previous day for each group, so you can see at a glance who added and who cut positions.
A live example: FII and DII cash flows
The derivatives positions are best read alongside what FIIs and DIIs did in the cash market. Here are their net cash flows for the last five trading days:
Look for agreement or disagreement. FIIs selling heavily in cash while adding index futures shorts is a consistent bearish picture. FIIs selling in cash while buying index futures can mean they are hedging or switching how they hold exposure. The FII and DII page shows both tables together, with the participant-wise figures for every group. For the index options side, the market-wide open interest picture is here:
The PCR here counts every trader's positions together. The participant report shows who holds them, but only once a day after the close.
What Pro and Client positions add
Since the four groups add up to the whole market, the other side of FII positions is held by Pro, Client and DII traders. Some patterns traders look at:
- Clients (largely retail) often hold the opposite of FIIs in index futures. When FIIs are heavily short and clients heavily long, the market has historically been under pressure; when this reverses, it often coincides with rallies. This is an observation, not a law.
- Pro traders are usually large net option sellers, collecting premium. Their positions explain much of the open interest seen in the option chain levels.
Limits and common mistakes
- Hedges look like bets. FIIs own large Indian stock portfolios. Index futures shorts and put purchases are often protection for those holdings, not a forecast.
- FIIs are not one trader. The figure combines many funds with different goals and time frames.
- Contracts, not value. Figures are contract counts. When lot sizes change (check NSE for current lot sizes), counts before and after are not directly comparable.
- End-of-day only. Positions are reported once, after the close. They say nothing about what happened during the day.
- Expiry and rollover. Around monthly expiry, positions close and reopen in the next month, which can make day-to-day changes jumpy. See futures rollover.
- Not a timing tool. FIIs can stay heavily short for weeks while the market rises.
Participant-wise open interest is one of the few public views of how big institutions are positioned in derivatives. Its value lies in trends over days and weeks, read together with cash flows, the chart and the option chain.