4.30pm: The Bank of Thailand announces intervention measures to curb the soaring baht, setting a reserve requirement on short-term capital inflows in which financial institutions would be required to withhold 30 per cent of foreign currencies bought or exchanged against the baht, except those related to exports.

After the market closed, the currency was moving at 35.90 to the US dollar.

December 19

10am: The Stock Exchange of Thailand (SET) Composite Index nosedived 64.62 points, or 8.85 per cent, to 665.93 in the first minutes of trading, and the blue-chip SET 50 Index fell 53.1 points to 458.9.

11.30am: The SET suspended trading for 30 minutes as part of a first-step "circuit breaker" measure after share prices nosedived 10.1 per cent. The SET Composite Index plunged 73.8 points to 656.75.

Noon: The SET had crashed 11.76 per cent in morning trade. The SET Composite Index plunged 85.89 points to close the morning session at 644.66.

During the day, the baht movement was about 35.50 to 35.90 and weakened at a peak of 36.06.

1.30pm: The Bank of Thailand meets fund managers and brokerages to discuss the impact on the stock market.

2.30pm: The SET Composite Index plummeted 102.8 points, or 14.07 per cent, to 627.75 in the first 15 minutes of the afternoon session, marking the biggest one-day drop ever in the 31-year history of the bourse.

3pm: Stocks experienced record losses in afternoon trade, as the SET dropped more than 19 per cent.

5pm: The baht closed at 35.90/35.93 to the dollar.