JEDDAH: GCC dollar sukuk and bond yields have surged to five-year highs as Iran war heightens risk perceptions, tightening liquidity and raising borrowing costs across regional debt markets, Fitch Ratings said. In a new report, the agency said the widening of spreads reflects a sharp shift in investor sentiment since the conflict began, exceeding volatility seen during recent geopolitical flashpoints and regulatory changes — though still falling short of the dislocation triggered by the COVID-19 pandemic.