Prime Minister Srettha Thavisin has instructed the Stock Exchange of Thailand (SET) to accelerate efforts to punish irregular share trading in order to restore confidence among foreign investors, a top official said on Tuesday.

The Anti-Money Laundering Office (Amlo) has frozen 5.3 billion baht in assets belonging to the fourth-largest shareholder in More Return Plc (MORE) and his associates over suspicion they manipulated the share price.