As a decline in the dollar picks up speed, longtime bear Stephen Jen is convinced the US currency’s woes are only beginning.

Haven no more? Dollar 'smile' looks lopsided This week's steep dollar plunge may be more remarkable than it appears on first glance because the greenback has failed to respond positively to ...

That behaviour has long been known in currency markets as part of the dollar "smile". The basic idea is the greenback tends to rise in times of hot inflation and rising U.S. interest rates ...

Jen says the recent moves fit well with the “dollar smile“ framework he put forward more than two decades ago as a strategist at Morgan Stanley. The theory, which has caught on among some ...