Geopolitical Tensions Snap Winning Streak: Sensex Sinks 479 Points as FIIs Turn Net Sellers on Expiry Day

Market Snapshot

The Indian equity markets faced a volatile session on the May monthly derivative expiry day, with the headline indices snapping a two-day winning streak. The BSE Sensex plummeted 479.26 points, or 0.63%, to settle at 76,009.70. Similarly, the NSE Nifty 50 declined by 118 points, or 0.49%, closing below the crucial psychological level of 24,000 at 23,913.70. Despite the weakness in front-line stocks, the broader market showed remarkable resilience; the Nifty Midcap 100 touched a fresh record high of 62,324.20 before closing 0.54% higher.

Institutional Flows: Cash Market

Institutional activity on May 26, 2026, reflected a "risk-off" sentiment among global participants, contrasted by steady domestic support.

• Foreign Institutional Investors (FIIs): According to provisional data, FIIs turned net sellers in the cash segment, offloading equities as geopolitical uncertainty in West Asia triggered a flight to safety. This follows a modest net purchase of ₹821.75 crore in the previous session (May 25).
• Domestic Institutional Investors (DIIs): DIIs remained the bedrock of the market, continuing their streak of net buying. Their sustained inflows were instrumental in supporting mid-and small-cap stocks, which outperformed the benchmarks. On the previous day, DIIs had infused a significant ₹3,856.88 crore.

Derivatives Market Activity

The session was characterized by high volatility typical of a monthly expiry day. Technical selling intensified in the second half as the Nifty failed to sustain gains above the 24,100 resistance zone.

• Expiry Dynamics: The Nifty 50 ended the May series with a marginal decline of 0.32%.
• F&O Ban: Steel Authority of India (SAIL) remained under the NSE’s F&O ban list as its open interest crossed the 95% Market-Wide Position Limit (MWPL).
• Volatility Index: The India VIX hovered around the 16.50 mark, reflecting heightened investor anxiety following reports of US military operations in southern Iran.

Key Drivers and Outlook

The primary catalyst for the day's decline was the escalation in the US-Iran conflict, which disrupted ongoing peace negotiations. This led to several macroeconomic headwinds:

• Crude Oil Surge: Brent crude prices spiked toward $99 per barrel, raising concerns over imported inflation for India.
• Currency Weakness: The Indian Rupee hit a record provisional low, weakening by 47 paise to settle at 95.73 against the US Dollar.
• Sectoral Performance: While IT and Metal sectors showed some strength, heavyweights in Financial Services and Private Banking led the downward move.

Looking ahead, analysts suggest that the 23,800–23,850 zone will act as immediate support for the Nifty. Market participants will closely monitor global developments and the upcoming release of US house price index data for further cues.

TAGS: FII, DII, Stock Market, Institutional Investors, Nifty, Sensex

Tags: FII DII Stock Market Institutional Investors Nifty Sensex