The news pushed the U.K.’s currency up—herding investors toward a cliff hours ahead of one of the largest crashes for any major currency since the birth of the modern global financial system. Trillions of dollars in asset values would be wiped off the books, but not just yet.
At 10:52 p.m., the pound rose above $1.50 and reached its highest mark in six months. A few minutes later, Ed Conway, the Sky News economics editor, appeared before a giant screen showing the spike. The pound had been tracking polls for months, Conway explained. Whether they were on couches in London or at trading desks in Chicago, people watching Sky or reading headlines sparked by its coverage had every reason to think Remain would prevail. But not quite everyone.
Behind the scenes, a small group of people had a secret—and billions of dollars were at stake. Hedge funds aiming to win big from trades that day had hired YouGov and at least five other polling companies, including Farage’s favorite pollster. Their services, on the day and in the days leading up to the vote, varied, but pollsters sold hedge funds critical, advance information, including data that would have been illegal for them to give the public. Some hedge funds gained confidence, through private exit polls, that most Britons had voted to leave the EU, or that the vote was far closer than the public believed—knowledge pollsters provided while voting was still underway and hours ahead of official tallies. These hedge funds were in the perfect position to earn fortunes by short selling the British pound. Others learned the likely outcome of public, potentially market-moving polls before they were published, offering surefire trades.
Excellent piece by Bloomberg