A measure of international trade often seen as a bellwether for the global economy has crashed to its lowest level ever, fueling fears we could be heading for another 2008-style crash. Back in November, the Baltic Dry Index dropped below 500 for the first time in recorded history, and it has kept falling ever since. On Wednesday morning it fell to a low of 369. To put that into perspective, the index was as high as 1,222 in August, and it has fallen 84% from a recent peak of 2,330 in late 2013. The Baltic Dry Index measures how much...