India stock market extended its bear run into fifth straight session on Friday. Benchmark indices were down for the fourth straight week, their longest weekly losing streak since August 2023. Sensex today tumbled 662.87 points, or 0.83%, to end the session at 79,402.29 levels. Nifty, on the other hand, closed below the crucial level of 24,200 at 24,180.80, down 218.63 points or 0.9%.