Premarket: Global stocks, bond yields slide as U.S. tariffs ignite new trade battle

Stocks and bond yields slid on Tuesday as investors globally ducked for cover after the United States hit Canada, Mexico and China with steep tariffs, launching new trade conflicts with the top three U.S. trading partners. European stocks slid 1%, falling back from record highs, with shares of automakers, vulnerable to trade duties, losing 3%. Aerospace and defense stocks hit a record high, however. Government bond yields fell. U.S. 10-year Treasury yields dropped to their lowest since October at 4.115%, while yields on German 10-year bonds, a benchmark for the euro zone, also slid. Other riskier assets lost ground too,…