Sensex and Nifty have been on a three-day winning streak this week despite foreign institutional investors (FIIs) unwinding long positions. Larsen & Toubro, Infosys, Titan, Tata Consumer Products and Maruti Suzuki India added to the Nifty 50 index, while Bharti Airtel, ICICI Bank, HDFC Bank, NTPC and Coal India weighed on the Nifty 50 index.