New Delhi, Jan 21 (UNI) Indian stock market extended its losing streak for a third consecutive session today amidst weaker global cues and the weakness of Indian rupee against US dollar, with the BSE Sensex crashing by 270.84 points or 0.33 percent to end negative at 81,909.63 and the Nifty s lipping by 75 points or 0.30 pc to 25,157.50. Among the sectors, barring Nifty Metal which was up 0.57 pc and Oil & Gas up by 0.27 pc, all other indices ended lower. Consumer Durables index fell nearly 2 pc, while Nifty Bank and PSU Bank crashed by 1 pc each.