Hedge funds’ net-bullish position on Brent crude, a measure of how positive money managers are that prices will gain. : Hedge funds’ net-bullish position on Brent crude, a measure of how positive money managers are that prices will gain New York: Over the past four months, investor optimism that global crude prices will rise has slumped by almost half.Hedge funds’ net-bullish position on Brent crude, a measure of how positive money managers are that prices will gain, has plunged 49 per cent since early April as trade wars cloud the picture for oil consumption.