Bangladeshi police have used tear gas and water cannon against angry investors after the stock market incurred huge losses.
Trading on the Dhaka Stock Exchange index was halted after it fell by 660 points, or 9.25%, in less than an hour.
It was the biggest one-day fall in its 55-year history.
It is estimated that over three million people - many of them small-scale individual investors - have lost money because of the plunging share prices.
The benchmark index had climbed by 80% in 2010 but has lost more than 27% since early December.
Investors and police also clashed last month.
Monday's protest followed losses of about 6.7% in Sunday trading.
Trading was also halted on the country's other main index, the Chittagong Stock Exchange. BBC News
