Comments from an unnamed US official via Reuters are weighing on oil:US actions will continue to be performance-based and tied to Iran's implemntation of its commitmentsOnce a deal is announced to restore commercial shipping without impediments, the US will lift the blockade of Iranian portsThis sounds like real progress and oil prices are on the defensive... but I'm skeptical of any US messaging until a deal is done. This article was written by Adam Button at investinglive.com.