Some of the biggest stock market crashes in India's history include Harshad Mehta scam of 1992, Asian financial crisis in 1997, dot-com bubble burst in the early 2000s, global financial crisis of 2008 and COVID-19 pandemic crash in 2020. Sensex opened over 3,900 points lower while Nifty opened over 1,000 points below on Monday amid US tariff turmoil.