US Treasury bonds have long served as a refuge for investors during times of panic. But as President Donald Trump unleashes an assault on global trade, their status as the world’s safe haven is increasingly coming into question. Yields, especially on longer-term debt, have surged on the tariff announcements, raising fears that key foreign buyers could take their money elsewhere, in a form of buyers' strike. Our Managing Editor for FX and Rates, Rachel Evans, joins host Stephen Carroll to discuss.