FIIs’ 7-Day Net Buy: ₹27,612 cr in Index Futures; Long-Short Ratio Nears 50%

Foreign Buying Builds, but Derivatives Signals Turn Mixed

A record burst of FII index-futures buying has lifted the long-short ratio, while falling open interest raises questions about the durability of the rally.

A sharp reversal in FII derivatives positioning

The latest index-futures activity marks a significant change in foreign investor positioning. FIIs were net buyers for seven consecutive trading sessions, accumulating ₹27,612.62 crore, according to NSE futures and options data. The amount is the biggest recorded in a seven-day period in the past two years. In comparison, net buying reached ₹17,140.35 crore over seven days in October 2025 and ₹17,433.78 crore over nine days in March 2025.

The futures activity follows more than ₹56,000 crore of FII buying in the equity cash segment in recent days. Together, the flows point to a stronger foreign bid across market segments. But futures positions can change quickly, and a burst of buying does not, by itself, establish that investors have adopted a lasting bullish view.

The ratio is improving, but shorts still outnumber longs

FIIs’ index-futures long-short ratio has climbed to 0.45, its highest level since July 2, 2025, when it stood at 0.50. The current reading means there is roughly one long position for every two short positions. It has risen sharply from 0.09 at the start of October 2026, but remains below the 1.09 high recorded in May 2025 and the peak of 4.39 reached on September 27, 2024.

The change suggests that some bearish positions may be getting unwound, helping fuel a short squeeze. That can provide near-term support as traders buy back shorts. However, the ratio remains below one, so long positions have not overtaken short positions. The distinction matters: improving sentiment is not the same as broad conviction that the market has further room to rise.

Falling open interest clouds the signal

Total FII open interest in index futures—including Nifty, Nifty Bank, Fin Nifty, Midcap Nifty and Nifty Next50—stands at 1.85 lakh contracts, its lowest level since February 25, 2026. Nifty futures account for around 61% of those positions, with open interest at about 1.13 lakh contracts, the lowest since December 2, 2025.

Systematix Institutional’s derivatives research head, Dharmesh Bhatt, sees the positioning as consistent with an ongoing short squeeze, but says declining index open interest could mean this source of buying support is nearing exhaustion. He cautions that the risk-reward is becoming less favourable as momentum and sentiment stretch. Bhatt also points to a less supportive macro backdrop: the Dollar Index at a fresh 52-week high, the US 10-year yield back above 5% and crude above its 200-day moving average. These are potential headwinds, not guarantees of a market reversal.

Nifty levels and option activity leave room for consolidation

SAMCO Securities’ Neel Parekh describes the derivatives setup as cautiously positive. Fresh put writing at 25,300 and 25,200 indicates support may be shifting higher, while call writing at 25,400 and 25,300 points to resistance near current levels. The put-call ratio was largely unchanged at 1.26, offering no clear sign of a major change in overall positioning.

Technical levels cited by analysts frame the near-term debate. HST Wealth’s Hariselvan Radhakrishnan says holding above 25,150 could keep 25,350–25,400 in reach, while a decisive break below support could bring consolidation towards 25,000. Bajaj Broking’s Pabitro Mukherjee sees follow-through above 25,500 opening the way to 25,800–26,000; failure to clear that level could leave the index consolidating between 24,700 and 25,500. These are conditional scenarios, not assured targets.

Key Highlights

• FIIs net bought ₹27,612.62 crore in index futures over seven sessions, a two-year high for a seven-day period.
• The long-short ratio rose to 0.45, but short positions still outnumber long positions.
• Total FII index-futures open interest fell to 1.85 lakh contracts, its lowest since February 25, 2026.
• Option activity points to support around 25,200–25,300 and resistance near 25,300–25,400.
• Analysts cite 25,150 and 25,500 as important near-term Nifty levels, with outcomes dependent on whether the index holds support or clears resistance.

Investor Note: The FII buying is a constructive near-term signal, but low open interest, persistent short positioning and the cited macro risks argue against treating it as confirmation of a sustained rally. Investors may want to watch follow-through in flows and the key Nifty levels rather than rely on the headline futures total alone.