Hedge fund managers were net sellers of petroleum-linked futures and options for a fifth week running last week as concerns about sanctions on Iran evaporated and investors refocused on economic worries. The net long position in the six most important petroleum-linked futures and options contracts was cut by a further 73 million barrels in the week to Oct. 30. Portfolio managers have been net sellers of 371 million barrels since the end of September, taking their net long position to the lowest level for 15 months, according to records published by regulators and exchanges. The sharpest sell-offs last week were in Brent (-54 million barrels) and U.S. gasoline (-11 million) with smaller reductions in NYMEX and ICE WTI (-2 million), U.S. heating oil (-4 million) […]