The bulk of the erosion in terms of value took place in India's most-valued firms. For instance, Mukesh Ambani-led Reliance Industries alone has lost Rs 3.8 trillion in m-cap, followed by HDFC Bank, which has seen its value erode by Rs 2.45 trillion and Tata Consultancy Services (TCS), which has lost Rs 1.85 trillion to stand at Rs 6.24 trillion, making it India's most-valued.