Experts say central banks are increasingly stuffing their vaults as an insurance policy in a volatile world Experts say central banks are increasingly stuffing their vaults as an insurance policy in a volatile world F ifteen minutes after takeoff, the call came for Serbia’s central bank governor: millions of dollars’ worth of gold bars, destined for a high-security Belgrade vault, had been left on the runway of a Swiss airport. In air freight – despite the extraordinary value of bullion – fresh