Question 1

What is FII and DII activity in the Indian stock market?

Accepted Answer

FII (Foreign Institutional Investors) are overseas entities like mutual funds, pension funds, and hedge funds investing in Indian markets — now also referred to as FPI (Foreign Portfolio Investors). DII (Domestic Institutional Investors) include Indian mutual funds, insurance companies, and banks. Their daily net buying/selling, tracked on NSE and BSE, is a primary gauge of institutional sentiment and market direction.

Question 2

What is the difference between FII and FPI in India?

Accepted Answer

FII (Foreign Institutional Investor) is the older term used before 2014. SEBI replaced it with FPI (Foreign Portfolio Investor) as a broader category that includes hedge funds, sovereign wealth funds, pension funds, and registered foreign institutional investors. For practical purposes in daily market data, FII and FPI refer to the same group of foreign investors buying and selling on Indian exchanges.

Question 3

How does FII selling affect Nifty 50 and the Indian market?

Accepted Answer

Since FIIs hold significant stakes in Nifty 50 constituents, their selling puts direct downward pressure on benchmark indices. Massive FII outflows often coincide with sharp Nifty corrections. However, consistent DII buying — largely funded by domestic SIP inflows — can absorb this selling and limit index drawdowns. Tracking the FII vs DII net flow gives early signals about whether the market is likely to hold support or break down.

Question 4

What time does NSE publish FII DII data daily?

Accepted Answer

NSE and BSE publish provisional FII and DII trading activity data daily after market close, typically between 8:00 PM and 9:30 PM IST. The data on OptionX is updated after each official exchange publication, giving you the freshest figures alongside AI-generated analysis each trading day.

Question 5

What is participant-wise open interest (OI) on NSE?

Accepted Answer

Participant-wise OI is the breakdown of futures and options open interest across four groups: FII (foreign institutional investors), DII (domestic institutional investors), PRO (proprietary traders / brokers' own books), and CLIENT (retail and HNI traders). Net positive OI means net long positions; net negative means net short. FIIs going net long on index futures is typically bullish, while heavy FII shorting in options is often used as a hedge against portfolio risk.

Question 6

What does the Futures tab on this page show?

Accepted Answer

The Futures tab shows index and stock futures positions for all four participant categories: FII, DII, PRO, and CLIENT. Net OI is quantity-wise open interest — positive means net long, negative means net short. FII also has an amount-wise breakdown in ₹ Crores by Nifty, BankNifty, and FinNifty. The charts show trends over your selected period so you can see how institutional positioning has evolved.

Question 7

How to read FII DII data for trading decisions?

Accepted Answer

When FIIs are consistently net buyers in cash markets and long in index futures, it signals bullish institutional conviction. When both FIIs and DIIs are net buyers simultaneously, the combined signal is strongly bullish. Conversely, heavy FII selling in cash + net short in index futures is a bearish signal. Cross-referencing cash market flows with F&O positioning gives a more complete picture of institutional intent. The AI analysis on this page synthesises all three data streams into a plain-English daily summary.

Question 8

Where does this FII DII data come from?

Accepted Answer

The data is sourced from official NSE and BSE exchange reports, processed daily after market close. The AI analysis is generated fresh each trading day using the Claude AI model, analysing cash market flows, futures positioning, and options data together to produce the daily sentiment summary.

Date	FII Call OI Δ	FII Put OI Δ	FII Net OI Δ	Client Net OI Δ	Nifty 50
Latest26 May 2026	-1,56,521	+79,284	-2,35,805	+3,73,594	23,913.7
25 May 2026	+1,18,115	-38,503	+1,56,618	-1,44,247	24,031.7
22 May 2026	+94,113	-20,486	+1,14,599	-3,38,941	23,719.3
21 May 2026	-33,906	+35,976	-69,882	+2,36,974	23,654.7
20 May 2026	-16,822	-49,332	+32,510	-2,08,545	23,659
19 May 2026	+9,032	+24,639	-15,607	+2,75,548	23,618
18 May 2026	+42,153	+11,923	+30,230	-1,47,946	23,649.95
15 May 2026	-24,471	+11,612	-36,083	+34,188	23,643.5
14 May 2026	+21,964	-64,419	+86,383	-2,47,393	23,689.6
13 May 2026	-4,009	-31,901	+27,892	-1,84,277	23,412.6
12 May 2026	+48,754	+63,354	-14,600	+97,702	23,379.55
11 May 2026	-48,623	+26,642	-75,265	+1,12,029	23,815.85
08 May 2026	+6,766	+7,767	-1,001	+71,946	24,176.15
07 May 2026	-66,480	+21,783	-88,263	+2,53,823	24,326.65
06 May 2026	+17,064	-25,888	+42,952	-2,50,935	24,330.95

FII Options OI Data — Participant-wise Call & Put Open Interest NSE

FII Options Open Interest — 26 May 2026

FII Options Open Interest — Recent Sessions (contracts)

Options OI — Frequently Asked Questions

Act on FII Options Data —
Right From the Terminal

FII Options OI Data — Participant-wise Call & Put Open Interest NSE

FII Options Open Interest — 26 May 2026

FII Options Open Interest — Recent Sessions (contracts)

Options OI — Frequently Asked Questions

Act on FII Options Data —Right From the Terminal

Act on FII Options Data —
Right From the Terminal