InvestmentsTop Global NewsMarketsReal Estate Tariffs, trade tensions worry Fortune 500 CEOs: US Chamber of Commerce By financialnews_rlv83x - December 18, 2019 0 134 Tariffs and trade tensions are a huge source of worry for U.S. companies, with nearly half of Fortune 500 companies referencing such concerns during last quarter’s earnings calls, the U.S. Chamber of Commerce said on Thursday.