Silver jumped to the highest in almost seven years and gold continued its march toward a record on expectations more stimulus is needed to help the global economy recover from the coronavirus pandemic. Investors have flocked to the precious metals on surging demand for havens amid a resurgence in virus cases, slowing growth and negative real interest rates in the U.S. After the success of a European rescue package this week, focus turns to negotiations between Republicans and Democrats on legislation to prop up the hobbled American economy. Holdings in exchange-traded funds backed by the metals are at an all-time high. Silver, used in manufactured products ranging from solar panels to electronics, is getting an added boost from supply concerns and bets on a rebound in industrial demand.