The Thai baht fell by as much as 0.8% to 35.648 against the dollar, the lowest level since April 2009 and worse than during last year’s military coup.
Bangkok shares slumped by almost 3%, with tourism-linked companies such as Airports of Thailand and Central Plaza Hotel particularly hurt.
Analysts warned that there could be more share sell-offs, which would again damage the currency, because the attack will ruffle the country’s tourism sector.
Tourism accounts for about one-tenth of Thailand’s economy and is reaching its high season.
The attack was carried out at the Erawan Shrine, which is a major tourist attraction, and resulted in the deaths of foreigners, including Chinese.
The shrine is home to a gilded statue to honour the Brahma God, whose four faces represent kindness, mercy, sympathy, and impartiality.
Chinese shares also slipped in its late trading, down 6%, which rippled into depressed trading in neighbouring Asian stock markets.
