Review- • Disappointing Q3 results from frontline companies sparked a sell-off on the bourses today, 21 January 2010. The market extended losses for the third straight day. Shares from sectors related to infrastructure were the worst hit. Asian markets were mixed as bullish economic data from China raised concerns Beijing may tighten policy. The BSE 30-share Sensex was provisionally down 423.82 points or 2.43%.