Container-line ZIM Shipping reported a 16% rise in fourth quarter revenues on a year earlier, in-line with the sector. While its average achieved rate rise of 5% was better than the industry-wide 1%, suggesting a degree of pricing discipline. Yet, a decline in profitability gives pause for caution. The company’s EBITDA margin fell to 6% from revenues from 8% a year earlier, whereas the sector at large saw an improvement. That’s likely explained by a 30% rise in port costs. ZIM has started the year on a more aggressive note in terms of market share, with a 17% rise in U.S. inbound volumes...