Monday’s flight-to-safety trade into U.S. government debt was sending the 10-year Treasury yield below an important technical level and shattering the previous sense of calm that many investors and traders had about the threat of U.

Treasury yields were lower on Tuesday as investors digested some weak economic data that fueled a rush to safety, while also waiting details on U.S. President Donald Trump's tariff policy. The yield on the 10-year Treasury lost 8.