A tweet from Guy Elster, Walla Foreign Correspondent says:The full opening of the Straits of Hormuz is a prerequisite (a redline) of any deal with Iran according to comments from White House officials. So this does not give a positive feeling. Although there were reports of a memorandum of understanding, the president had not signed off on the deal. Crude oil is trading at $89.50. That's up $0.82 on the day. This article was written by Greg Michalowski at investinglive.com.