Thailand's stock market faces sustained capital outflows and declining investor confidence—SET Index down ~800 points since 2018, with foreign net selling of 100+ billion baht in 2025 alone. The government and SET are deploying dual strategies: transparency improvements (stricter nominee company rules, enhanced disclosure standards, governance alignment) and the JUMP+ initiative (143 listed companies enrolled as of April). Critical enabler: all four Big Four auditors (Deloitte, EY, KPMG, PwC) must operate in Thailand to provide the specialized expertise, global networks, and credibility needed to benchmark Thai firms against London/New York/Singapore standards and unlock long-term capital (FDI, institutional, ESG-linked).