From the table of IPO Price of stock. As stock prices March – September 2015. March of the stock price is low is 40.50 baht cause the percent of 2.50%. In April , May and June The opening price of the shares is similar. As a result, the percentage change is similar. In July and August is the month when the opening price of the shares is quite high and is the highest percentage changes. But at September the price values the stock as high as possible, but with the percentage changes.