SET trading halted after index plunges 8%, triggers circuit breaker

2026-03-04 - 06:33

BANGKOK — The Stock Exchange of Thailand (SET) suspended trading on Wednesday after the benchmark SET Index plunged 117.52 points, or 8.01%, at 12:18, triggering an automatic Level 1 circuit breaker. Trading on both the SET and MAI markets was halted for 30 minutes to allow investors to assess the sharp volatility. The exchange said trading would resume in the afternoon session under normal hours. Products with underlying assets other than SET-listed common shares continued trading as usual. The bourse also ordered a temporary suspension of program trading from the moment trading resumes until market close on 4 March. Under circuit breaker rules, a fall of 8% triggers a 30-minute halt, 15% prompts another 30-minute pause, and a 20% drop results in a one-hour suspension, after which trading resumes without further halts.