A U.K., Union Jack Flag flies in front of the Houses of Parliament, in London, U.K., on Monday, Feb. 15, 2016. U.K. lawmakers are not the only ones bracing for a tough few months before Britain's referendum on its European Union membership. A gauge of expected volatility for the pound near the highest since 2011 shows traders are expecting a rough ride too. Photographer: Jason Alden/Bloomberg via Getty Images
