South Korean container-line Heung-A has written to customers assuring them of its financial stability. That follows a 61% drop in its stock price in the past year. Financially it has fallen behind the container-line sector. The company made an EBITDA margin loss of 0.9% in the fourth quarter, down from a 5.4% profit a year earlier, while the sector rose to 8.7% from 7.5%. One issue is that Heung-A has smaller-than average vessels (1,245 TEUs vs. 4,392 TEUs) which may make it less efficient. Importantly Heung-A is in different situation to Hanjin Shipping, which failed financially in A...