Gold has pulled in traders like never before on its way to the highest price in a year. Volume on the Comex in New York, the largest bullion futures exchange, hit a record in August as North Korean tensions and a weaker dollar boosted demand for the metal. Some 6.55 million contracts worth almost $900 billion now changed hands last month, more than when Donald Trump was elected U.S. president or during substantial price spikes and slumps.