Oil fell on Tuesday, as investor nervousness over next week’s vote on Britain’s possible European Union exit swept financial markets, eclipsing signs of a return to health for crude prices. Perceived safe-haven assets such as the Swiss franc and German Bunds rallied, while industrial commodities and equity markets, seen as more vulnerable to economic risk, fell after polls showed Britain’s “Leave” campaign leading before a referendum on EU membership.. This overshadowed a more upbeat forecast for oil demand growth from the International Energy Agency, which said the oil market is essentially balanced after two years of surpluses. [IEA/M] Brent crude oil futures fell by 69 cents to $49.66 a barrel by 0842 GMT, dropping for a fourth day in a row, while U.S. crude futures […]