Dongkuk Structures & Construction Company Limited's ( KOSDAQ:100130 ) price-to-earnings (or "P/E") ratio of 56.1x might make it look like a strong sell right now compared to the market in Korea, where around half of the companies have P/E ratios below 18x and even P/E's below 9x are quite common. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.