US fiscal deterioration is increasingly becoming a key risk for global markets, with higher Treasury yields potentially putting pressure on equities and constraining the Federal Reserve's policy flexibility, Jefferies said in its latest research report.

The US Treasury moved on Wednesday to calm a bond market rattled by surging borrowing costs, doubling the size of its debt buybacks hours before separate figures confirmed that…

US Treasury's expanded buyback operations draw market criticism as 30-year yields hit 5.3%, with analysts warning unpredictable debt strategy