Business Dalal Street Downturn: TCS Leads Losses as Top 5 Indian Firms Erase ₹1 Lakh Crore in Valuation August 17, 2026 Dhananjai Driven by global market volatility and escalating geopolitical tensions between the US and Iran, the Indian stock market experienced a weak trading week. The benchmark BSE Sensex dipped by 489.92…