Key financial ratios 4Q 17/18 3Q 17/18 2Q 17/18 1Q 17/18 4Q 16/17
Profitability ratios          
Gross operating profit margin (%) 46.2% 31.8% 50.9% 41.1% 44.7%
Operating EBITDA margin (%) 32.3% 23.5% 34.4% 29.5% 29.1%
Recurring net profit margin (%) 19.6% 17.1% 13.4% 12.0% 8.4%
Net profit margin (%) 41.1% 16.3% 23.8% 13.5% 12.3%
ROA (%) 4.5% 2.7% 2.5% 2.4% 2.8%
ROE (%) 10.3% 5.7% 4.7% 4.3% 4.9%
Liquidity Ratio          
Current Ratio (times) 0.93x 1.13x 0.91x 1.39x 1.43x
Leverage          
Interest bearing debt to equity (times) 1.02x 1.07x 0.97x 0.92x 0.85x
Adjusted net debt1 to equity (times) 0.37x 0.34x 0.30x 0.10x 0.13x
Adjusted net debt1 to recurring operating EBITDA (times) 3.02x 3.98x 4.05x 1.43x 2.07x
Interest coverage (times) 3.31x 3.66x 2.75x 3.12x 0.57x
Per share ratios 2          
Earnings per share (THB) 0.21 0.08 0.06 0.03 0.04
Book value per share (THB) 3.91 3.92 3.88 3.99 3.82

1(*) Adjusted net debt: calculated based on interest bearing debt - cash and cash equivalent and liquid investment

2 per share ratios, calculated based on numbers of shares with par value at THB 4 per share

Key financial ratios 2017/18 2016/17 2015/16 2014/15 + 2013/14 +
Profitability ratios          
Gross operating profit margin (%) 41.0% 51.9% 60.4% 55.5% 51.4%
Operating EBITDA margin (%) 29.0% 34.0% 42.9% 39.9% 36.3%
Recurring net profit margin (%) 16.0% 15.4% 29.2% 28.2% 16.4%
Net profit margin (%) 24.6% 20.1% 41.9% 32.6% 52.3%
ROA (%) 4.5% 2.8% 6.6% 5.0% 17.6%
ROE (%) 10.3% 4.9% 8.9% 6.4% 22.7%
Liquidity Ratio          
Current Ratio (times) 0.93x 1.38x 0.81x 3.83x 4.36x
Leverage          
Interest bearing debt to equity (times) 1.02x 0.85x 0.20x 0.09x 0.11x
Adjusted net debt1 to equity (times) 0.37x 0.13x 0.15x (0.11)x (0.03)x
Adjusted net debt1 to operating EBITDA (times) 3.02x 1.72x 2.57x (1.96)x (0.65)x
Interest coverage (times) 3.31x 4.55x 9.30x 8.68x 4.94x
Per share ratios 2          
Earnings per share (THB) 0.37 0.17 0.35 0.25 1.08
Book value per share (THB) 3.91 3.82 3.96 4.38 5.09

1(*) Adjusted net debt: calculated based on interest bearing debt - cash and cash equivalent and liquid investment

2 per share ratios, calculated based on numbers of shares with par value at THB 4 per share