Abstract:
This independent study aims to study the effects of macroeconomic factors affecting stock return volatility: case studies of stocks in SET 50 using monthly secondary data since January 2005. Up to March 2019, representing 170 units. The data includes the following information: 1) The return data of the securities with the highest 10 Market Capitalization in the primary market 2) Macroeconomic variables and other related variables including Exchange rate between baht and US dollar inflation Government bond yields, amount of money, return rate of SET 50 securities, with data analysis tools, namely 1. Augmented Dickey - Fuller test 2. ARMA-GARCH models 3. The seemingly unrelated regressions (SUR) According to studies, the share of high volatility returns is BBL, SCC, CPALL, SCB, KBANK, AOT, PTT, PTTEP ADVANC and BDMS, respectively. ADVANC's return on investment BBL and KBANK have a significant return on SET 50 shares at the 0.1 level. The volatility of returns, CPALL and SCC shares, has a significant relationship with SET50 stock returns at the level of 0.05. The volatility of stock returns, AOT and PTTEP is associated with inflation, with statistical significance at 0.1 level in the opposite direction. The volatility of returns on BDMS, KBANK and PTT shares is correlated with inflation with statistical significance at the level of 0.05 in the opposite direction. The volatility of stock returns, AOT, BBL, BDMS and SCB are related in the same direction as the amount of money with statistical significance at level 0.1 in the same direction. And the volatility of returns, SCC shares are related in the same direction as the amount of money with statistical significance at the level of 0.05 in the same direction