LONDON—For a startling moment on Friday, the British pound crashed. In just three minutes shortly after 7 a.m. Hong Kong time, the pound sank 6% to as low as $1.18, according to Thomson Reuters data. Some electronic platforms recorded scattered trades near $1.15. For the currency markets, where moves are recorded in thousandths of a penny, it seemed that currency traders were all hiding under their desks. But the most...

Source: Wall Street Journal October 07, 2016 13:55 UTC