Listed companies' chief executives are upbeat about the country's economic outlook thanks to clearer public investment plans for large infrastructure projects.
The quarterly survey found CEOs expecting their investments to grow domestically and overseas, said Pakorn Peetathawatchai, senior executive vice-president of the Stock Exchange of Thailand (SET).
Other Asean countries remain Thai listed companies' top destinations, the survey said. "These are good times, as they are about to start an investment spree," Mr Pakorn said.
The survey, conducted by the SET, asked CEOs of 115 listed companies from 21 sectors about their views on Thailand's economic outlook in the first half. They estimated GDP growth to come in at 2-4% this year.
The Bank of Thailand last month slashed its forecast for economic growth to 3.1% this year from 3.5% predicted previously after it had cut export growth to a 2% contraction from zero growth projected earlier. The Fiscal Policy Office plans to lower its 2016 growth forecast from 3.7%.
China's economy remains a major headwind for the Thai economy and overseas shipments are expected to be tepid in the first six months on the back of the global economic uncertainties, Mr Pakorn said.
The survey said CEOs were confident that profitability in all sectors, especially services, would improve this year, he said, adding that 49% of the CEOs expected revenue to rise by more than 6%.
Mr Pakorn said offshore funds fled back to the Thai stock market in March, extending their buying streak.
Foreign investors ploughed 26.53 billion baht into the market in March alone, a 25.73% increase from the previous month that turned their investment position to a net buy of 1.83 billion in the first quarter.
The SET index was up 9.3% this year at the end of March, making it the best-performing stock market in Asia.
Its market capitalisation at the end of last month had increased by 5.4% month-on-month to 13.73 trillion baht, while its average daily trading value jumped 25.7% from the previous month to 5.25 billion.