US Treasury yields have risen to nearly 5%, approaching their highest level in almost two decades, as investors fear inflation rates will remain high due to the ongoing Iran War and US trade policies. This has led to a global bond sell-off, with Asian and Australian bonds also seeing declines. The increase in Treasury yields suggests that investors are concerned about inflation and are selling government debt. As a result, US Treasury Secretary Scott Bessent's efforts to calm the market appear to have failed, sparking worries that Washington is acting like a weaker borrower. This development has significant implications for global politics and economies, with many experts describing these as "worrying times for bond markets". The recent surge in Treasury yields marks a shift away from the low-interest-rate environment of previous years.