After much anticipation, we finally know which countries have drawn the US Treasury department's ire for playing fast and loose with their currencies.

Late Tuesday, the Treasury department released its report on the foreign-exchange practices of its trading partners. No country was found to be manipulating their currencies, but the Treasury did announce some rule changes, putting more countries under scrutiny.

While the twice-yearly report normally comes in April and October, the Treasury's most recent edition came nearly two months late, stirring up several theories as to what exactly was holding things up. Some believed the Treasury was waiting until after the G20 summit in Osaka at the end of June, as the department has in the past used summits and ongoing negotiations as a reason for delay. Others pinned it on an internal debate among officials about how to go about evaluating Vietnam's penchant for intervening in its currency.