XAU=GOL/ Oil prices also edged lower, with Brent crude LCOc1 down 0.62% at $91.59 a barrel, though the bigger news in oil markets was that ChevronCVX.N said it agreed to buy Hess HES.N for $53 billion in stock. Higher bond yields and the risk of a wider Mideast conflict soured investor sentiment at the start of a week full of major corporate earnings and key inflation data. Investors will be looking for any kind of signal from ECB President Christine Lagarde about how the rise in global bond yields might affect the outlook for euro zone monetary policy.