Mutual fund is one of the most popular investments. It is suitable for investors who do not available for gathering and analyzing information. Instead, rely on fund managers investment analysis and made an investment decisions. This reduces investors’ time and cost consuming in the analysis and consideration. One of the most popular mutual funds is SET 50. It is investment focusing the top fifty stocks in Thailand Stock Exchange. It is interesting that what are differences between the investors buying the top fifty stocks by themselves and invest via SET 50 mutual funds. This paper aims to 1) study the overall returns and volatility of SET 50, and SET 50 mutual funds, and 2) compare the return from SET 50 and SET 50 mutual funds by using Monte Carlo Simulation Model analyze six out of twelve SET 50 mutual funds with more than ten-year establishment were chosen in this study. The result showed that there were two SET 50 mutual funds providing higher return and having lower coefficient of variation than SET 50 index. When imitating the investment situation by using Monte Carlo Simulation Model, it was found that SET 50 Fund with lower coefficient of variation than SET 50 index provided higher return than SET 50 index.

Mutual Fund, Return, Monte Carlo