The U.S. trade deficit widened in November from the lowest level since 2009 as imports rebounded and exports fell, highlighting wide monthly swings in response to the Trump administration’s vacillations on tariffs. The trade data have been prone to volatility related to the implementation of U.S. trade policy. That was the case again in November, with a surge in inbound shipments of pharmaceuticals and a slide in gold exports. The latest trade data will help economists firm up their estimates for fourth-quarter gross domestic product. On an inflation-adjusted basis, which filters into the real GDP measurement, the merchandise trade deficit widened to $87.1 billion in November, the largest in four months.