Domestic equity markets posted their biggest weekly fall this week since July 2009 as disappointing corporate earnings, sliding rupee and weak global markets continued to dampen sentiments. Sensex tanked 1,630.85 points, or 6.62 per cent, to 22,986.12 on Feb 12, 2016 from 24,616.97 on Feb 5, 2016. Similarly, NSE Nifty slid 508.15 points, or 6.79 per cent, to 6,980.95 during the week under review.