This research is to investigate the effects of efficiency in internal audit review of listed companies in Stock Exchange of Thailand by collecting data from 518 audit committee of listed companies in Stock Exchange of Thailand by using a questionnaire as an instrument. The results of statistics used for analyzing the collected data were simple linear regression analysis and multiple linear regression analysis indicated efficiency in internal audit reviews had positive relationships with corporate performance effectiveness and efficiency in risk management. Moreover effectiveness performance revealed a positive effect on gold achievement. The results obtained from this study could be used as guidelines for developing creating and improving the efficiency in audit committee performance and internal audit practice for organization to create reliability to the public and to be able to survive sustainably in a long period of time.

The objective of this research aimed to study factors affecting earning persistence and firm value of list firms in the stock exchange of Thailand in set 100 Index. The data was collected in 5 years period from 2011 – 2015 which including 213 samples and then analyzed data by using descriptive statistics and multiple regression analysis. The research revealed growth rate of sales current earnings and cash flow for short term investment reflected to earnings persistence. Furthermore this research also shed some light on factors affecting firm value and found that earnings persistence financial risk dispersed ownership structure and discretionary accrual directly affected to firm value. These results provided more information to investors about significant factors for decision making especially discretionary accrual factor. Therefore firms who have low level of earnings management and high level of earning persistence will reflect to future firm value.

This research aims to study the relationship between profitability which included gross margin operating margin net profit margin return on assets return on equity and earnings per share and price to earnings ratio and dividend yield. The data were collected from financial statements and the annual reports of the companies listed on the Stock Exchange of Thailand (SET100). The top three companies selected should yield a maximum registered capital of each business category from the 1st January to the 31st of December during 2012 and 2015. 20 companies were chosen. The statistics used in the data analysis were descriptive and analyzed by arithmetic mean maximum minimum Standard Deviation and Pearson Correlation Coefficients to describe the characteristics of the collected data. The results of the study revealed that profitability gained from the gross margin operating margin net profit margin return on assets and return on equity. The earnings per share ratio were related to the price to earnings ratio and dividend yield at the reliability level of 95% and 99%.

This research aimed to study the factors affecting return of gold futures in Thailand futures exchange. The study used the daily historical data of five years from January 1 2011 - December 31 2015. There were five factors to be used in the study. They were Interbank Rate Set Index Exchange World Crude Oil Price and Gold Price and Used the Descriptive statistics to test the basic data and the Multiple Regression Analysis to test the hypothesis. The study found that the Interbank Rate Set Index Exchange Rate World Crude Oil Price and Gold Price were able to forecast the Coefficient of Determination (R2) approximately at 0.617. It showed that the independent variables in the model could explain the change of dependent variable at 61.70% and found that the most affecting factors on return of gold futures were Gold Price and Interbank rate by having the same directional relationship with the return of the Gold Futures in the Thailand Futures Exchange.

The objective of this research was to analyze determinants of nonperforming loans (NPLs) in commercial banking industry of Thailand during 2005 and 2014. This study used quarterly secondary data from the 1st quarter 2005 to the 4th quarter 2014 totaling 40 quarters. Descriptive statistics for testing data and econometric method for analyzing equation and multiple regression analysis for testing the hypothesis were used. The results of this research showed that the nonperforming loans (NPLs) in commercial banking industry of Thailand was positively related to the size of commercial bank with a confidence level of 95%but negatively related to consumer price index and prime rate with a confidence level of 95%. Loan-to-deposit ratio gross domestic product and loan volume were not related to NPLs.