In two sessions, October 4-5, the Sensex plummeted nearly 1,600 points. In the week, the BSE benchmark index plunged 1,851 points marking the biggest ever weekly fall in absolute terms. The biggest fall in percentage terms was on April 28, 1992, the aftermath of Harshad Mehta scam, when it plunged 12.77 percent. The biggest intraday fall in Sensex was recorded on January 22, 2008, when it dived 2,273 points. Here are the 10 biggest single day crashes in Sensex's history 2/11 February 11, 2008 | 834 points | The Sensex plunged 1,007 points intraday and it ended 834 points, or 4.78 percent lower. The benchmark index closed at 16,630 points on growing global worries over slowing economic expansion. Weak global markets and disappointing corporate earnings affected the market sentiments. 3/11 February 2, 2018 | 840 points | Benchmark index witnessed steepest single-day fall in more than a year as stricter tax rules for stock investments and the easing of fiscal def