Eight of India's 10 most-valued Indian companies added ₹1.55 lakh crore to their market valuation between November 18-22. This comes as stock markets recorded strong gains. HDFC Bank was the top gainer, whose market capitalisation rose by ₹40,392.91 crore to ₹13,34,418.14 crore. Other firms which recorded gains included TCS, ICICI Bank, Infosys, Hindustan Unilever, ITC, Bharti Airtel and SBI.