Indian stock markets experienced a mixed trading day on Monday, December 29, 2025. After a muted start with marginal gains, the Sensex and Nifty picked up momentum, influenced by positive Asian market trends and domestic institutional buying. However, selling pressure in oil, gas, and IT sectors, coupled with foreign fund outflows and thin year-end trading volumes, led to a decline by the close. The Sensex shed 346 points, and the Nifty fell 100 points, marking a fourth consecutive day of losses for both indices.