The pound dived Friday morning as results in Britain's EU membership referendum showed the "Leave" camp posting big wins and bookmakers making the exit camp favourites.

Sterling briefly dropped to $1.3645, its lowest since early 2009, swinging wildly from earlier deals when it touched a 2016 high of $1.50.

The yen was under 100 against the dollar for the first time since November 2013, as fears about the vote's outcome pushed traders into Japan's currency, which is seen as safe haven in times of turmoil and uncertainty.