Many studies were trying to explain the changes of stock returns by finding the factors impact on a certain market, industry, or stock. Focusing on the financial institution especially commercial bank, there are some research proved that interest rate is one of the crucial factor impact the commercial bank stock returns. Interest rate is the cost and return of money in financial market since commercial bank acts as major financial intermediary; therefore, interest rate is still the majority of its cost and return. In Thai stock market shows ...