Following comments from key central bankers at an economic policy meeting in the United States boosted the sentiment yellow metals. Spot gold rose 0.5 percent to $1,297.60 an ounce, after reaching its highest since Aug. 18 at $1,298.58 earlier. At the meeting in Jackson Hole on Friday, Yellen made no Reference to U.S. monetary policy but instead focused on financial regulations, leading traders to expect a slowing in further interest rate hikes. Later in the day, European Central Bank Chief Mario Draghi said the bank's ultra-loose monetary...