Comments on: “Trading costs on the Stock Exchange of Thailand” Authors: Charoenwong C., Ding D.K., Jenwittayaroje N. Comments on: “Risk-taking behaviour during downturn: evidence of loss-chasing and

in competitor and the economic downturn in the country. Gross Profit The Company’s gross profit in 2017 is THB 99.52 million equivalent to 25.30 percent, in which the gross profit margin of the Company

equivalent to 11.46 percent due to increases in competitors and the economic downturn in the country. Gross Profit The Company’s gross profit is THB 79.70 million equivalent to 25.83 percent, in which the

competitor and the economic downturn in the country. Gross Profit The Company’s gross profit in 2017 is THB 99.52 million equivalent to 25.30 percent, in which the gross profit margin of the Company has

percent, due to increases in competitors and the economic downturn in the country. Gross Profit The Company’s gross profit for 1st Quarter 2018 was THB 30.26 million, represent gross profit margin of 26.21

Office of the Securities and Exchange Commission No. SorKhor/Nor. 37/2550 Re: Relaxation on Calculation and Announcement of Net Asset Value of Mutual Funds Investing in Equity Instruments Issued by PTT

specific permission of PTT is strictly prohibited with Future Energy and Beyond Powering Life ทิศทางกลยุทธ์ของ ปตท. CONFIDENTIAL & PROPRIETARY Any use of this material without specific permission of PTT is

by THB 29.59 million or equivalent to 20.22 percent due to increases in competitor and the economic downturn in the country. Gross Profit The Company’s gross profit for 1st Quarter 2017 is THB 31.00

to 13.22 percent due to increases in competitor and the economic downturn in the country. Gross Profit The Company’s gross profit for 2nd Quarter 2017 is THB 60.46 million equivalent to 27.01 percent

the global economic downturn in overall sectors as compared to previous year. 2. Cost of sales For the year 2017, the Company’s cost of goods sold was Bt. 101,016.22 million or 94.50% of sale revenues