The Impact of Voluntary IFRS Adoption on Financial Reporting Quality and Firm Value: Evidence from Listed Firms in Vietnam

As emerging economies expedite their integration into global capital markets, comprehending the implications of voluntary International Financial Reporting Standards (IFRS) adoption has become increasingly critical for regulators, investors, and corporations. This study examines the influence of voluntary IFRS adoption on the quality of financial reporting and the value of firms in Vietnam, a transitional economy characterized by a unique code-law legal tradition, a substantial disparity between domestic accounting standards and IFRS, and a government-mandated adoption roadmap that establishes a distinctive quasi-voluntary adoption phase. The study utilizes a panel dataset of 562 firms listed on the Ho Chi Minh Stock Exchange (HOSE) and the Hanoi Stock Exchange (HNX) from 2019 to 2022, employing a fixed-effects regression model with robust standard errors to account for unobservable firm heterogeneity. Utilizing agency theory and signaling theory, the research anticipates and validates that voluntary IFRS adoption correlates positively with diminished discretionary accruals (serving as an indicator of financial reporting quality) and elevated Tobin’s Q (acting as a measure of firm value). The estimated effect corresponds to a 10.7% reduction in discretionary accruals and a 13.1% increase in Tobin’s Q relative to sample means—magnitudes that are both statistically and economically significant. Unlike prior studies that rely exclusively on archival data, this study employs a survey-based measure of voluntary IFRS adoption activity to capture preparatory behaviors that are not yet observable in public financial disclosures, representing a methodological contribution to the literature. The results have useful implications for policymakers in Vietnam and other developing countries that are considering adopting IFRS on either a voluntary or mandatory basis. They show that taking the initiative to follow international reporting standards makes reports more trustworthy and the market more valuable.