Among the 30-share Sensex blue-chip firms, NTPC, Hindustan Unilever, Tata Motors, Maruti, Larsen & Toubro, Reliance Industries, Asian Paints and State Bank of India were the biggest laggards.Bharti Airtel, IndusInd Bank, Tech Mahindra, Infosys, Adani Ports and Tata Consultancy Services were among the gainers.