India's National Stock Exchange and Bombay Stock Exchange indices showed contrasting movements during the final trading hours of May 21, 2026 [1, 2].

These fluctuations occur during the critical expiry day session, where high trading volumes often lead to significant price swings that impact investor portfolios across the region.

Market data from the closing bell session indicated a downward trend for the Sensex, which fell 479 points [1]. Simultaneously, the Nifty index closed below the 24,000-point threshold [1]. These figures highlight a period of intense selling pressure as the trading day concluded on May 21 [3].

Individual stock performance varied widely during the session. The top gainers included Adani Enterprises, Tata Motors Passenger Vehicles, Tech Mahindra, Nestle, and Eternal [1]. Conversely, the top losers were identified as Apollo Hospitals, Bharti Airtel, TCS, Wipro, and Trent [1].

Reports on the immediate aftermath of the expiry session showed a partial recovery. On May 22, 2026, the Sensex rose 231 points [2]. During that same session, the Nifty ended at 23,719 points [2].

The discrepancy between the May 21 closing data and the May 22 recovery reflects the volatility typical of expiry dates. While some sources focused on the sharp decline during the final hour of the 21st, others tracked the subsequent stabilization on the 22nd [1, 2].

“The Sensex fell 479 points during the closing bell session.”

The volatility observed between May 21 and May 22 underscores the impact of contract expiry on the Indian markets. The sharp drop on the 21st followed by a modest gain on the 22nd suggests a rapid reallocation of capital by institutional traders, common when derivative positions are closed or rolled over.