If you're searching for the definition of a swoon, you could do worse than look at the yen over the past two months. Worries that Japan will soon embark on a new aggressive round of
So why is the yen rallying now?
To some extent, traders who sold the yen against the dollar are just booking profits. But Sean Callow, a senior currency strategist at Westpac Bank, thinks something else might be at work.
"From our point of view, you can't make a fundamental case for the scale of the gains and the speed that we've seen in dollar-yen over the past couple of months," he told CNBC. "We're not going to be too surprised by any particular pullback."