Traders report a US investment bank ran USD/JPY from 89.65 to 90.08 on a mere $500 mln. Given the typical depth in USD/JPY, you have to try pretty hard to get a fill that bad. The buck is almost back at is starting point, now at 89.75. Must have been for a customer they are happy to lose, or perhaps a margin call for a lousy prime brokerage client…