Governments’ borrowing costs hit further multi-decade highs as US-Iran peace hopes fade

# Why This Matters The convergence of escalating US-Iran tensions and soaring government borrowing costs creates a dangerous feedback loop with immediate economic consequences. When investors flee to safety, they dump government bonds, pushing yields higher—and governments that depend on consistent, affordable financing suddenly face sharply increased debt servicing costs, forcing painful choices between social spending and fiscal discipline. For developing nations already struggling with debt loads, these elevated borrowing rates can become prohibitively expensive, potentially triggering defaults or forcing austerity measures that destabilize economies and fuel social unrest. The Trump administration's apparent willingness to expand military operations in the region signals that geopolitical risk premiums could remain elevated for months, meaning businesses will delay investment decisions, central banks may hesitate to cut rates despite economic weakness, and the global economy could slow substantially even without actual conflict.