The stock markets crashed today on uncertainty over the formation of the government. They did recover later in the day but the early plunge was the biggest in BSE's history.

Stocks Plunge in India on Fears Over New Leaders (New York Times)

Indian markets crash on political turmoil (Reuters via Forbes)

India's stock market suffers big crash" (AP via MSNBC)

Investor fears spark Indian shares crash (Edinburgh Evening News)

Market loses over Rs 2 lakh crore capital (HindustanTimes.com)

UPDATE: This chart below (from Yahoo!) tells the story:

The flat parts are when the trading was halted (twice).