Synopsis Just a few weeks ago, the bottlenecks at ports from Singapore to Los Angeles and Rotterdam were looking like short-term headaches and added costs during peak season. Now they’re threatening to act more like a brake on the global recovery. iStock In some cases, supply snarls are begetting demand drags: Some factories complain they can’t consider new orders until the clogged pipeline clears. Shocks to supply chains are engulfing a wider swath of the global economy as the pandemic rages on, threatening to stifle Asia’s trade-led recovery just as soaring freight rates make it harde...