The paper analyzed the impact of earnings quality (EQ), debt maturity, investment efficiency (IE) of listed companies on Vietnam stock market thanks to the regression methods of FEM, REM and GLS and data of enterprises in the period of 2010 - 2018. The research findings have shown that EQ and debt maturity have a positive impact on EI, in which EQ has a stronger influence than debt maturity. A review of both EQ and the debt maturity for overinvestment or underinvestment indicated a positive impact and the stronger impact on overinvestment. Based on the research findings, the authors have put forth several recommendations for investors, businesses and policy makers.

The paper examines the impact of corporate governance (CG), capital structure (CS) on firm value (FV) of firms in Vietnam. The study used different regression methods using the data collected at enterprises listed on the stock market in Vietnam over the period 2008-2018, with 2937 observations. The research results find that the size of the Board of Directors, the independence of the Board of Directors, the percentage of women participating in the Board of Directors had a positive influence on FV. Besides, in the case of the Chairman of the Board of Directors controlling the CEO, the frequency of the Board meeting had a negative effect on FV. The study has determined that CS has nonlinear influence on FV, in addition, the research results also prove that firm size had positive relationship to FV. The empirical research results are a useful basis to help businesses improve FV, thereby helping businesses need to consider the elements of the Board of Directors in each enterprise, determine the appropriate capital structure.

pandemic is affecting the health of the public, and it is also impacting business and economy. The main objective of this paper is to investigate the impact of Covid-19 pandemic on listed firms' performance and the abnormal stock returns in Vietnam. To study the impact of Covid-19 on firms' performance, we collected data about announced earnings on Q1/2020 and Q4/2019 of 714 enterprises and made comparison. The results revealed the enormous impacts of Covid-19 pandemic on the business performance. However, the level of influence varies among sectors. To study the impact of Covid-19 on the abnormal stock returns, the study employed the event research method with 3 events related to Covid-19 pandemic in Vietnam. A sample of 364 companies listed on Ho Chi Minh Stock Exchange (HOSE) was utilized. The findings revealed that the Covid-19 event affects the abnormal returns of stocks and the level of influence varied from each stage of Covid-19 prevention measure in Vietnam. The degrees of influence of the Covid-19 event on each stock were also different. The paper concluded that Covid-19 pandemic information can be used to predict stocks' prices.

The paper examines the impact of debt structure (DS) on the earnings quality (EQ) of energy businesses (DN) in Vietnam. The authors measure EQ in terms of profit management to consider the effect of accounts payable; short-term debts and loans; long-term debts and loans on EQ. The research uses generalized least squares regression method with data gathered from 468 observations collected at energy enterprises listed on the stock market in Vietnam in the period of 2009-2018. The study results have found that accounts payable to suppliers and short-term debts and loans have negative effect on EQ; while long-term debts and loans have positive effect on EQ. Besides, firm size has a positive effect on EQ, while profitability is a not statistically significant variable. The empirical research results are useful basis to help businesses improve their EQ, thereby helping businesses to consider an appropriate level of DS.

No abstract