The Thai capital market is closely monitoring the upcoming announcement of securities that meet the criteria for the market surveillance tier 1 (Cash Balance) measure, which the Stock Exchange of Thailand (SET) is scheduled to release on Friday.
Tisco Securities estimates that Hana Microelectronics Public Company Limited (SET: HANA) and Jaymart Group Holdings Public Company Limited (SET: JMART) are likely to be placed under this measure due to significant recent increases in both share prices and trading values, with turnovers surpassing the specified thresholds.
The tier 1 Cash Balance measure is seen by traders as a hindrance to stock movement by abruptly cutting off market leverage. It forces investors to deposit cash in full before buying and revokes their ability to use the stock as collateral. This severely reduces market liquidity and speculative momentum.
At the end of the trading session on Thursday, the share price of HANA remained unchanged at THB 34.50, with a trading value of THB 2.68 billion. During the morning session, the highest price reached was THB 36.00 and the lowest was THB 33.75, with a trading value of THB 1.55 billion. On Wednesday (20 May 2026), HANA’s share price closed at THB 34.50, up THB 5.00 or 16.95%, with a trading value of THB 3.38 billion.
JMART closed the trading session on Thursday at THB 8.50, a drop of THB 0.35 or 3.95%, with a trading value of THB 234.02 million. Between 15–20 May 2026, JMART’s share price rose by a total of 21.23%, with a cumulative trading value of THB 2.11 billion.
Civil Engineering Public Company Limited (SET: CIVIL) closed the trading session at THB 1.32, down THB 0.05 or 3.65%, with a trading value of THB 14.87 million.
Delta Electronics (Thailand) Public Company Limited (SET: DELTA) closed the trading session at THB 326.00, up THB 3.00 or 0.93%, with a trading value of THB 4.24 billion.
Tisco stated that HANA and JMART have now met the criteria for inclusion in the market surveillance tier 1 (Cash Balance). Additionally, the warrant DELTA01P2609A will be under trading restriction until 22 May 2026, unless the period is extended.
Bualuang Securities wrote that HANA has met the Cash Balance criteria, as its average trading value and turnover levels now exceed the limits set by the market. DELTA, meanwhile, continues to be closely watched.
Bualuang estimates that if DELTA’s share price rises to around THB 360, it could trigger the Cash Balance restriction, pushing the price-to-earnings (P/E) ratio to approximately 160x. Should DELTA be included under the restriction once again, the company’s eligibility for inclusion in the next review of the SET50 Index could be affected.
