United Parcel Service Inc (NYSE:UPS) just delivered a warning that global trade turbulence is far from behind us. During the third-quarter earnings call, CEO Carol Tomé revealed that the courier giant's China-to-U.S. trade lane fell sharply as new tariff rules took effect. "We saw an over 20% decline in that trade lane in the third quarter and expect that will continue into the fourth quarter," Tomé said.Track UPS stock here.Tariff Turmoil Hits Global Trade FlowsAt the center of the disruption is the elimin ...