The uncertainty centers on what the White House considers transshipment and how US Customs officials would regulate goods moving from China to the US via Vietnam.
With two attacks on commercial vessels in recent days, including one that killed three mariners, any thought that the risk in the Red Sea was easing to the point the Suez route might be restored in the near future has vanished.
Mediterranean Shipping Co. is furthering its lead in vessel tonnage so far this year as it absorbs more than double the amount of new capacity added by No. 2 carrier Maersk.