The pound tumbled on Monday as City traders took fright at a series of polls that appeared to show Britain heading for an EU exit in this month’s referendum. The cost of insuring against wild swings in the pound over the next month also jumped to a level not seen since the height of the financial crisis. Sterling fell by as much as 1.5 cents to below $1.44, adding to a decline of 2 cents last week that has illustrated the pressure on the UK currency since the remain camp’s lead in the polls began to evaporate. Hedging insurance against swings in the pound against the dollar has surged after a volatility benchmark ... (full story)