Oil is on its way back to the 4-year ceiling; Gold and silver under interest rate pressure Global markets moved on Wednesday under the simultaneous influence of geopolitical developments in the Middle East and US interest rate expectations; Brent oil returned to a 4-year high by crossing $115, while gold and silver retreated after 2 sessions of growth. In the base metals market, copper remained above $6.6 per pound, and the continued boom in AI-related transactions supported demand for this metal.